Microchip MD1730 Handleiding


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2016 Microchip Technology Inc. DS20005586B-page 1
MD1730
Features
8-Channel Ultrasound Continuous Waveform
(CW) Transmitter with Integrated Beamformer
CW Output ±1V to ±6Vp-p with Low RON
-160 dbc/Hz Ultra-Low Phase Noise at 1 kHz
Offset and 5 MHz
8-Bit Programmable Per-Channel Beamforming
Phase Delay
8-Bit Programmable Dividers for CW Frequency
with Input Clock Frequency up to 250 Mhz
Input Clock Compatible with LVDS/SSTL or
Single-Ended LVCMOS
LVCMOS 2.5V Logic for the Control I/O pins
Fast SPI Interface Supports up to 200 MHz
SPI Interface Supports Daisy Chaining and
Broadcasting Mode
Applications
Medical Ultrasound Imaging System for
Cardiovascular Application
Ultrasound Fetal Heart Monitoring Device
Ultrasound Flow Meter
Programmable Array Pattern Generator
General Description
The MD1730 is an 8-channel ultra-low phase noise CW
transmitter with integrated beamformer. It is designed
for medical ultrasound imaging systems requiring
high-performance CW Doppler mode. The MD1730
has a dedicated signal path designed to minimize
phase noise to the output. In addition, it has a
high-speed SPI interface that enables CW
beamforming features. The outputs of the MD1730 can
swing up to ±6V and each output has a separate
programmable phase delay. Additionally, by
programming the internal frequency divider register,
the MD1730 can output different CW frequencies from
a single clock source. For instance, when the input
clock frequency is 160 MHz and the frequency divider
is set to 16, an output CW frequency of 5 MHz can be
obtained with a phase delay step size of 6.25 ns, which
translates to an angular resolution of 11.25 degrees.
Package Type
2
CLKN
VLL
EN
CBE1
SDO
CKB1
SPIB
CBE0
CKB0
GND
CLKP
EP
1
3
4
6
7
8
9
37
5
10
GND
TXRW
VGP
MD1730
6x6x0.9 mm 36-lead VQFN*
* Includes Exposed Thermal Pad (EP); see Table 3-1.
VDD
SCK
CSN
SDI
11 1512 13 14 181716
26
27
25
24
22
21
20
19
23
36 35 3134 33 28293032
VGN
CNF
VCW-
CPF
V
CW+
CW2
CW3
CW0
CW1
VGN
CW4
CW5
CW6
CW7
CNF
VCW-
CPF
VCW+
8-Channel Ultra-Low Phase Noise
Continuous Waveform Transmitter with Beamformer
MD1730
DS20005586B-page 2 2016 Microchip Technology Inc.
Block Diagram
0 to +
VC W+
C W0
VP F
VNF
+10V
VG P
E N
+2.5V
VL L
TXR W
S P IB
S DI
C S N
S C K
C L K N
C L K P
LVDS / S S T L
C loc k Input
S P I
&
R egis ters
G ND
C W1
MD1730
Thermal
P ad
-10V
S UB
V L L
C L K
C K B 0
C W7
VP F
VNF
0 to -
VC W-
VCW +
VCW -
HIZ[7: 0]
C P F
VP F
VNF
C NF
S DO
Q
MS B
D
0
C K B 1
C B E 1
V L L
C B E 0
+5V
VDD
VG N
C L K
P HD 7~0[7: 0] C WF D[7: 0]
P HD1[7: 0] C WF D[7: 0]
E NAE NA
Q
C L K C L K
Q
P HD7[7: 0] C WF D[7: 0]
E NA
E NA
Q
C L K C L K
Q
8
64
C L K
S C K
VCW +
VCW -
1uF
1uF 2.2uF
2.2uF
1uF
1uF
1uF
1uF
P HD0[7: 0] C WF D[7: 0]
E NA
E NA
Q
C L K C L K
Q
C W2
C W3
C W4
C W5
C W6
6V
6V
2016 Microchip Technology Inc. DS20005586B-page 3
MD1730
MD1730 CW Output via HV2201 Application Block Diagram
+10V
V
GP
+2 to +6V
VCW+
CW0
VPF
VNF
EN
+2.5V
V
LL
TXRW
SPIB
SDI
CSN
SCK
CLKN
CLKP
LVDS / SSLT
Clock Input
SPI
&
Registers
GND
CW1
MD1730
Thermal
Pad
-10V
SUB
VLL
CLK
CKB0
CW7
VPF
VNF
-2 to -6V
VCW-
VCW+
VCW-
HIZ[7:0]
CPF
VPF
VNF
CNF
SDO
Q
MSB
D
0
CKB1
CBE1
VLL
CBE0
+5V
V
DD
V
GN
CLK
PHD7~0[7:0] CWFD[7:0]
PHD1[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
PHD7[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
PHD0[7:0] CWFD[7:0]
ENAENA
Q
CLK CLK
Q
8
64
CLK
SCK
VCW+
VCW-
XDCR
XDCR
D
LE
CL
SW0
D
LE
CL
SW1
D
LE
CL
SW2
D
LE
SW6
D
LE
CL
SW7
CLK
8-BIT
SHIFT
REGISTER
DIN
DOUT
LEVEL
SHIFTERS
OUTPUT
SWITCHES
VNN VPP CLR LE GND VDD
LATCHES
CL
TX7
EN
SEL
POS
NEG
B/CW
LVL[3:2]
POS[3:2]
NEG[3:2]
VDD2
High Speed
Gate Buers
VDD2
VDD1
VDD1
VSS
VDD1
High Speed
Gate Buers
Control
Logic and
Level
Transla-
tion
GND
MD1715
1 of 2-ch
TC8020
6 of 12-FET
+10V
VDD2
+10V
VDD1
+10V
AVD D
+90V
SP1
+50V
SP2
-90V
SN1
-50V
DP1
DN1
DP2
DN2
SN2
SP3
SN3
DP3
DN3
GP1
GN1
GP2
GN2
GP3
GN3
OP1
ON1
OP2
ON2
OP3
ON3
-10V
VSS
-10V
AVSSPADGND PAD VSUB
TX0
VDD2
High Speed
Gate Buers
VDD2
VDD1
VDD1
VSS
VDD1
High Speed
Gate Buers
Control
Logic and
Level
Transla-
tion
MD1715
1 of 2-ch
TC8020
6 of 12-FET
+10V
VDD2
+10V
VDD1
+10V
AVD D
+90V
SP1
+50V
SP2
-90V
SN1
-50V
DP1
DN1
DP2
DN2
SN2
SP3
SN3
DP3
DN3
GP1
GN1
GP2
GN2
GP3
GN3
OP1
ON1
OP2
ON2
OP3
ON3
-10V
VSS
-10V
AVSSPADGND PAD VSUB
HV2201
8-ch HV Analog Switch
EN
SEL
POS
NEG
B/CW
LVL[1:0]
POS[1:0]
NEG[1:0]
GND
B/CW LE +3.3V-100V +100V
CW/ B
CW_START
FPGA
FPGA
MD1730
DS20005586B-page 4 2016 Microchip Technology Inc.
NOTES:
2016 Microchip Technology Inc. DS20005586B-page 5
MD1730
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Positive Logic Supply (VLL)........................................................................................................................ -0.5V to +3.0V
Positive Supply Voltage (V
DD ).................................................................................................................... -0.5V to +6.0V
Positive Supply Voltage (V
GP ).................................................................................................................. -0.5V to +13.5V
Negative Supply Voltage (VGN)................................................................................................................ +0.5V to -13.5V
CW Output Positive Supply Voltage (VCW+) ............................................................................................... -0.5V to +12V
CW Output Negative Supply Voltage (VCW-)............................................................................................... +0.5V to -12V
All Digital Inputs (VIN)................................................................................................................................. -0.5V to +3.0V
CW Outputs (VOUT)...................................................................................................................................... -12V to +12V
Operating Ambient Temperature ................................................................................................................. C to +85°C
Maximum Junction Temperature ................................................................................................................. 0°C to +85°C
Storage Temperature ............................................................................................................................................ +125°C
Thermal Resistance Junction to Ambient (Ɵ
JA, JESD51-5)..................................................................................25°C/W
Thermal Resistance Junction to Bottom Cu Pad (Ɵ
JB, JESD51-5) ....................................................................6.4°C/W
Thermal Resistance Junction to Package Top (ƟJC, JESD51-5).......................................................................13.5°C/W
ESD Rating All Pins ............................................................................................................................................. ±1.0 kV
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at those or any other conditions above those indicated in the
operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods
may affect device reliability.
TABLE 1-1: INPUT/OUTPUT PIN DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VLL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Operating Supply
Logic Supply Voltage VLL 2.35 2.50 2.65 V (VGP+|VCW-|) 10V
(VGN+|VCW+|) 10V
TA
= 0 to +85°C, Note 2
VDD Supply Voltage VDD 4.75 5.0 5.25 V
Positive Supply Voltage VGP 8.0 10 12 V
Negative Supply Voltage VGN -12 -10 -8.0 V
CW Output Positive Supply VCW+ 1.0 — 6.0 V
CW Output Negative Supply V
CW- -6.0 — -1.0 V
VLL Quiescent Current I
LLQ 0.02 0.1 mA EN = 0, f
CLK = fSCK = 0
All logic input no transit
VDD Quiescent Current IDDQ 0.15 0.2 mA
VGP Quiescent Current IGPQ 1.0 2.0 µA
VGN Quiescent Current IGNQ 33 45 µA
VCW+ Quiescent Current I
CW+Q 26 45 µA
VCW- Quiescent Current I
CW-Q 6 10 µA
VLL Enabled Current ILLEN 6.0 9.0 mA EN = 1, f
SCK = 120 MHz
TXRW = 0, SDI = 0,
SDO no load.
VDD Enabled Current IDDEN 0.2 0.3 mA
VGP Enabled Current IGPEN 2.0 3.0 mA
VGN Enabled Current IGNEN 2.0 3.0 mA
VCW+ Enabled Current I
CW+EN 2.0 3.0 mA
VCW- Enabled Current I
CW-EN 2.0 3.0 mA
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
MD1730
DS20005586B-page 6 2016 Microchip Technology Inc.
VLL Current at CW 5MHz ILL5 2.5 3.0 mA EN = 1, fCLK = 80 MHz,
TXRW = 1, CW 5 MHz,
no load 8-channel
VDD Current at CW 5MHz IDD5 1.0 2.0 mA
VGP Current at CW 5MHz IGP5 6.0 10 mA
VGN Current at CW 5MHz IGN5 12 18 mA
VCW+ Current at CW 5MHz ICW+5 26 35 mA
VCW- Current at CW 5MHz ICW-5 21 30 mA
SPI & Logic
Input Logic High Voltage VIH 0.8 VLL — VLL V 2.5V LVCMOS
Input Logic Low Voltage V
IL 0 0.2 VLL V
Input Logic High Current IIH 1.0 µA
Input Logic Low Current I
IL — µA
SPI and Logic Input Capacitance C
IN 4.5 pF Note 1
Output Logic High Current I
OH mA 2.5V LVCMOS
Output Logic Low Current IOL — mA
SDO Output Logic High Voltage VOH V with 5 pF load
SDO Output Logic Low Voltage V
OL — 0.35 V
TABLE 1-2: SPI AND LOGIC AC ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Output Rise Time tr 0.65 ns 1.5 pF load, Note 1
Output Fall Time tf 0.65 —
Output Rise Propagation Delay t
dr 2.8 ns CLK rise 50% to output
50%, after latency.
Note 1
Output Fall Propagation Delay tdf 3.0 —
Delay Time Matching tdm ±0.5 ±1.0 ns Channel to channel,
Note 1, fCLK = 80 MHz
SDI Valid to SCK, Setup Time t
10.6 1.0 ns Note 1
SCK To SDI Data Hold Time t
22.0 — — ns
SCK High Time % of 1/fCLK t345 55 % Note 2
SCK Low Time % of 1/fCLK t445 — 55 %
CSN Hi-Time t52-cycle SCK Note 2
SCK Rise to CSN Rise t6 2.0 ns Note 1
CSN Low to SCK Rise t7 0.8 — ns
SDO Valid from SCK Rise t8 3.1 4.0 ns SPIB = 0, 1.5 pF Load,
Note 1
CSN Rise to SCK Rise t9 2.0 ns Note 1
CSN Rise to TXRW or SPIB Rise t10 9-cycle SCK Note 2
TXRW or SPIB Fall to CSN Fall t11 1-cycle
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
TABLE 1-1: INPUT/OUTPUT PIN DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
2016 Microchip Technology Inc. DS20005586B-page 7
MD1730
SDO to SDI Valid Delay t12 2.3 3.0 ns SPIB = 1, 1.5 pF Load,
Note 1
TXRW Rise to CLKP Rise t13 2.5 ns Note 1
Latency to CW Wave Rise t14 2-cycle CLK After TXRW = 1,
PHD=0, Note 2
Latency CSN Rise to TXRW Fall t15 2-cycle CLK Note 2
SCK Clock Frequency fSCK 200 MHz Note 1
EN Off Time tEN-Off 20 30 ns Note 2
EN On Time tEN-On 150 300 µs 2.0 µF on CPF/CNF,
Note 2
TABLE 1-3: CLOCK BUFFER OUTPUTS AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Clock Output Frequency
Range
fCKB 40 160 250 MHz Note 1
Clock Output Duty Cycle D% 45 55 % Note 2
CKB0,1 Rise Time trb 0.6 1.0 ns fCLK = 80 Mhz, 1.5 pF
load, Note 1
CKB0,1 Fall Time tfb — 0.5 1.0
Output Rise Propagation
Delay
tdrb 2.0 3.0 ns CLK rise to CKB, 50%,
Note 1
Output Fall Propagation
Delay
tdfb — 2.0 3.0
CBE Enable Time tcbe 2.1 3.0 CBE to CLK rise, 50%,
Note 1
CKB0,1 Output logic high VOHCKB — VLL V Note 2
CKB0,1 Output Logic low VOLCKB GND V Note 2
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
TABLE 1-4: CW OUTPUTS DC/AC ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
CW Output Peak to Peak Voltage VCWOUT -6.0 - +6.0 V
CW Output Rise Propagation Delay tdrCW 4.0 6.0 ns TxCLK 50% to CWx
10%, after latency,
Note 1
CW Output Fall Propagation Delay tdfCW 4.0 6.0
CW Output Maximum Current ICW± ±250 ±300 mA VCW± = ±5.0V, 0.1
load, Note 1
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
TABLE 1-2: SPI AND LOGIC AC ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
MD1730
DS20005586B-page 8 2016 Microchip Technology Inc.
Static Output Resistance PFET RONCW 7.5 12 RON at VCW± = ±5.0V,
ICW± = ±100 mA load,
Note 1
Static Output Resistance NFET 6.5 11
Change in RDS(ON) with
Temperature
RONCW 1.0 %/C VCW± = ±5.0V, Note 2
CW Phase Resolution REPhase 1 CLK Note 2
CW Phase Noise NPhase -160 — dBC/
Hz
CW 5 MHz,
1 kHz Offset, Note 1
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
TABLE 1-4: CW OUTPUTS DC/AC ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
TABLE 1-5: LVDS / SSTL CLOCK INPUTS AC / DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
LL = +2.5V, VGP = +10V, VGN = -10V, VCW+ = +6.0V,
VCW- = -6.0V, VDD = +5V, TA= 25°C.
Parameters Sym. Min. Typ. Max. Units Conditions
CLKP/CLKN Clock Frequency fCLK 40 160 250 MHz Note 1
Clock Input Slew Rate tCSR 1.0 V/ns Note 2
Control/Data Input Slew Rate tDSR 1.0 — V/ns
Single Ended Clock Input
SSTL Reference Voltage VREFS 1.13 1.25 1.38 V Note 1
DC Input Logic High VIH(DC) VREFS +0.15 — VLL +0.3 V Note 1
DC Input Logic Low VIL(DC) -0.3 — VREFS -0.15 V Note 1
AC Input Logic High VIH(AC) VREFS +0.31 V VREF = 0.5VLL, Slew
rate 1.0 V/ns, Note 1
AC Input Logic Low V
IL(AC) - — VREFS -0.31 V
Differential Clock Input
AC Differential Cross Point VX(AC) 0.5VLL -0.2 — 0.5VLL+0.2 V CLK and CLK, Note 1
DC Input Max Swing Voltage VSWING(DC) 0.3 — VLL +0.6 V Note 1
AC Differential Input Voltage VSWING(AC) 0.62 — VLL +0.6 V Note 1
DC Input Signal Voltage VIN(DC) -0.3 — VLL +0.3 V Note 1
CLKP/CLKN Slew Rate SLEW 1.0 V/ns Note 2
Note 1: Characterized only; not 100% tested in production.
2: Design Guidance Only (DGO).
2016 Microchip Technology Inc. DS20005586B-page 9
MD1730
NOTES:
MD1730
DS20005586B-page 10 2016 Microchip Technology Inc.
2.0 TYPICAL PERFORMANCE CURVES
FIGURE 2-1: IDD vs. Temperature.
FIGURE 2-2: IVGP vs. Temperature.
FIGURE 2-3: IVCW+ vs. Temperature.
FIGURE 2-4: IVLL vs. Temperature.
FIGURE 2-5: IVGN vs. Temperature.
FIGURE 2-6: IVCW- vs. Temperature.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VDD = 5.0V,
fCLK = 80 MHz,
fCW = 5 MHz,
8-ch, no-load
0
1
2
3
4
5
6
7
8
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VGP = 10V,
fCLK= 80 MHz,
fCW = 5 MHz,
8-ch, no-load
0
5
10
15
20
25
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VCW+ = 5V,
fCLK= 80 MHz,
fCW = 5 MHz,
8-ch, no-load
0
0.5
1
1.5
2
2.5
3
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VDD = 2.5V,
fCLK= 80 MHz,
fCW = 5 MHz,
8-ch, no-load
0
1
2
3
4
5
6
7
8
9
10
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VGN = -10V,
fCLK= 80 MHz,
fCW = 5 MHz,
8-ch, no-load
0
5
10
15
20
25
0 10 20 30 40 50 60 70 80 90 100
Current (mA)
Temperature (°C)
VCW- = -5V,
fCLK= 80 MHz,
fCW = 5 MHz,
8-ch, no-load
2016 Microchip Technology Inc. DS20005586B-page 11
MD1730
FIGURE 2-7: IVDD vs. CW Output
Frequency.
FIGURE 2-8: IVCW+ vs. CW Output
Frequency.
FIGURE 2-9: IVCW- vs. CW Output
Frequency.
FIGURE 2-10: IVLL vs. CW Output
Frequency.
FIGURE 2-11: IVGN vs. CW Output
Frequency.
FIGURE 2-12: IVGP vs. CW Output
Frequency.
0
0.5
1
1.5
2
2.5
3
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
VDD = 5V,
8-ch, 220 pF,
1 kȍ
0
50
100
150
200
250
300
350
400
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
VCW+ = 5V,
8-ch, 220 pF,
1 kȍ
0
50
100
150
200
250
300
350
400
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
VCW- = -5V,
8-ch, 220 pF,
1 kȍ
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
VLL = 10V,
8-ch, 220 pF,
1 kȍ
-1
1
3
5
7
9
11
13
15
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
0
1
2
3
4
5
6
7
8
9
10
0 2 4 6 8 10 12
Current (mA)
CW Frequency (MHz)
VGP = 10V,
8-ch, 220 pF,
1 kȍ
MD1730
DS20005586B-page 12 2016 Microchip Technology Inc.
FIGURE 2-13: Typical CW Output Phase Noise Curves.
Phase Noise (dBc/Hz)
Offset Frequency (kHz)
2016 Microchip Technology Inc. DS20005586B-page 13
MD1730
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
6x6 VQFN Symbol Pin Function
1 EN Device Enable Input. When EN = 0, the SPI and the internal regulator are disabled. The
device is enabled when EN = 1. Note that the EN pin has no control over the clock
buffers, as the clock buffers have their dedicated enable pins.
2 CLKP Positive Input of the Internal System Clock and is compatible with LVDS/SSTL. For
LVCMOS 2.5V input refer to Figure 4-8.
3 CLKN Negative Input of the Internal System Clock and is compatible with LVDS/SSTL. For
LVCMOS 2.5V input refer to Figure 4-8.
4 VLL +2.5V Positive Voltage Power Supply, it requires a 1.0 µF decoupling capacitor to GND
5, 33 GND Ground, 0V
6 VDD +5V Positive Voltage Power Supply, it requires a 1.0 µF decoupling capacitor to GND
7 SCK Serial Peripheral Interface (SPI) clock input
8 CSN Serial Peripheral Interface (SPI) chip-select. CSN is an active-low signal.
9 SDI Serial Peripheral Interface (SPI) data input
10 SDO Serial Peripheral Interface (SPI) data output
11, 35 CBE0-1 The clock buffer enable pin. When CBEn = 0, the corresponding clock buffer is
disabled. The clock buffer is enabled otherwise.
12, 34 CKB0-1 2.5V Single-ended Clock Buffer output pins
13 TXRW CW Transmission Control pin. When TXRW = 0, the SPI is enabled for read/write.
When TXRW = 1, the SPI is disabled and the CW transmission is started.
14, 23 VGN -10V Negative Voltage Power Supply, it requires a 2.2 µF capacitor to GND. The V
GN
supply is also the substrate and should be the most negative supply to the chip.
15, 31 CNF Negative Floating Supply Bypass Capacitor pin. Connects 1 µF/10V capacitor between
this pin and the VCW- pin.
16, 30 VCW- -1V to -6V Negative Voltage Power Supply for the CW output, it requires a 1.0 µF
decoupling capacitor per pin to GND
17, 29 CPF Positive Floating Supply Bypass Capacitor pin. Connects 1 µF/10V capacitor between
this pin and the VCW+ pin.
18, 28 VCW+ +1V to +6V Positive Voltage Power Supply for the CW output. It requires a 1.0 µF
decoupling capacitor per pin to GND.
19, 20, 21,
22, 24, 25,
26, 27
CW0-7 Channel 0-7 CW Waveform Output
32 VGP +10V Positive Voltage Power Supply, it requires a 2.2 µF decoupling capacitor to GND
36 SPIB SPI Broadcasting Mode pin. When SPIB = 1, the broadcast mode is enabled.
37 EP Exposed Thermal Pad (EP); must be connected to GND
MD1730
DS20005586B-page 14 2016 Microchip Technology Inc.
NOTES:
2016 Microchip Technology Inc. DS20005586B-page 15
MD1730
4.0 DEVICE DESCRIPTION
4.1 Operation Description
The MD1730 is an 8-channel ultra-low phase noise
monolithic CW transmitter. It consists of an SPI
interface to program internal phase delay registers and
frequency dividers to facilitate CW beamforming. It
supports differential LVDS/SSTL and single-ended
2.5V LVCMOS clock inputs. The MD1730's output path
is designed to provide ultra-low phase noise and can
swing up to ±6V. The following sections provide a
detailed overview of MD1730's feature set and
operation.
4.2 Using The Built-in Clock Buffers
The MD1730 has two built-in single ended clock output
buffers. The MD1730 can accept LVDS, SSTL25 and
LVCMOS 2.5V clock at its input and provide a
single-ended output buffered clock. The clock buffers
are independent of the chip's main EN pin and each
output clock buffer can be enabled or disabled
separately using the CBE0 or CBE1 pin. The maximum
clock frequency of the buffers is 250 MHz. The output
timing diagram for the clock buffers is shown in
Figure 4-5. As shown in the diagram CKB0 and CKB1,
clock outputs are only dependent on CBE0 and CBE1
respectively. This feature makes it convenient to drive
the TX pulser retiming clock input, such as the HV7321.
Using the built in clock buffers will save the cost of
additional buffers, reduce PCB area, simplify the
system clock distribution design and improve power
savings as well.
4.3 SPI Registers Description
REGISTER 4-1: SPI CONTROL REGISTER DESCRIPTION
Data Bits Description
W/R The W/R is the read write control bit. When W/R = 1, the SPI writes the data provided at the
addressed register. When W/R = 0, the SPI reads the data stored from the appropriate register.
The read operation is disabled when SPIB = 1.
CWFD<7:0> The CWFD<7:0> register stores the divisor value for setting the CW output frequency. The CW
output frequency is set by using the equation (f
CW = fCLK/(2*CWFD)) except CWFD = 0. For
CWFD = 0 the CW output frequency is fCW = fCLK/2*512. The CW output frequency ranges from
(fCLK /512) fCW (fCLK /2). The register's initial value is 0.
PHDCH<7:0> PHDCH<7:0> sets the phase delay for each individual channel. The equation for the output delay
time is PHD<7:0>/fCLK + 2/fCLK once TXRW goes high. The register initial value is 0. Refer to
Figure 4-4 for further details.
HIZCH HIZCH bit enables the channel output when the corresponding bit is . The channel is disabled 0
and its’ output becomes high Z when the corresponding bit is 1. The default register value is 0.
Note: CH denotes channel number 0 to 7.
MD1730
DS20005586B-page 16 2016 Microchip Technology Inc.
REGISTER 4-2: SPI REGISTER ADDRESS AND CONTROL BITS
4.4 Serial Peripheral Interface (SPI)
The MD1730’s SPI is used to program the phase delay
and frequency divider registers. The SPI supports
writing at speed up to 200 MHz and the MSB is shifted
in first. SPI interface supports two operating modes:
daisy chain mode and broadcasting mode.
When SPIB = 0, the MD1730 is in daisy chain mode. In
this mode, it supports both read and write operations.
When SPIB = 1 the chip enters the “Broadcasting”
mode. In this mode, the SDI data shifts into the shift
register as well as to the SDO output. In this mode, the
user can write the same register of different daisy
chained chips with the same value in a single write
transaction. However, when SPIB = 1 the read
operation is disabled. To verify the written data for each
chip, the user can revert SPIB = 0 and perform a
normal read operation.
4.4.1 SPI WRITE OPERATION EXAMPLES
The following is a 1-byte writing example for the
register at ADD = 0011b with the data
D<7:0> = 01010101 when SPIB = TXRW = 0.
1. The Write operation starts with setting CSN to
low.
2. The SCK clock is used to shift in the following
SDI data:
W/R SPI Register ADD<3:0> Write or Read Data <7:0>
D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1 = Write
0 = Read
MSB first.
(See
Section 4.3
and
Section 4.4)
0 0 0 0 Channel 0 phase delay PHD0<7:0>
0 0 0 1 Channel 1 phase delay PHD1<7:0>
0 0 1 0 Channel 2 phase delay PHD2<7:0>
0 0 1 1 Channel 3 phase delay PHD3<7:0>
0 1 0 0 Channel 4 phase delay PHD4<7:0>
0 1 0 1 Channel 5 phase delay PHD5<7:0>
0 1 1 0 Channel 6 phase delay PHD6<7:0>
0 1 1 1 Channel 7 phase delay PHD7<7:0>
1 0 0 0 HIZ7 HIZ6 HIZ5 HIZ4 HIZ3 HIZ2 HIZ1 HIZ0
1 0 0 1 CW frequency divisor number CWFD<7:0>
Note: Power-On or EN = 0 sets all the registers to 0.
TABLE 4-1: PHD<7:0> PHASE DELAY TIME REGISTER DESCRIPTION
PHD<7:0> Delay Time to Start Transmitting
00000000 0/fCLK (Power-on default)
00000001 1/fCLK
00000010 2/fCLK
......... ........
11111110 254/fCLK
11111111 255/fCLK
TABLE 4-2: CWFD<7:0> CW FREQUENCY DIVIDER REGISTER DESCRIPTION
CWFD[7:0] Transmit CW Frequency fCW
00000000 fCLK/512 (Power-on default)
00000001 fCLK/2
00000010 fCLK/4
00000011 fCLK/6
......... ........
11111110 fCLK/508
11111111 fCLK/510
Note: The selected CW frequency is same for all the CW0~7 outputs: f
CW = fCLK/2*CWFD. The CW frequency
applies to all channels.
2016 Microchip Technology Inc. DS20005586B-page 17
MD1730
D12 = 1, W/R bit set equal to high for write
operation.
ADD<11:8> = 0011b, address for channel-3’s
phase delay register.
D<7:0> = 01010101b, data to be written into
channel-3’s phase delay register.
The SDI data is shifted in at the rising edge of
SCK.
3. Once the complete data has been shifted in, the
CSN should be taken high to finish the writing
operation. The SDI data is latched into
channel-3’s phase delay register on the rising
edge of the CSN signal. CSN has to be kept high
for a minimum of 2-SCK cycles for the data to be
written into the appropriate register.
In the case of eight chips daisy chained together as
shown in Figure 4-3, there should be 13 x 8 = 104
cycles of SCK before the CSN is taken high.
The MD1730 can also be used in the Broadcasting
mode to write several daisy chained chips with the
same data. The Broadcasting mode can be used to
reduce the time required to write the SPI if several
MD1730 chips need the same data. The following is a
1-byte writing example for the register at the address
location ADD = 0011b with data D<7:0> =01010101b
while the MD1730 is set to broadcasting mode.
1. The write operation starts with setting CSN to
low with TXRW = 0 and SPIB = 1.
2. The SCK clock is used to shift in the following
SDI data to the first MD1730 chip:
D12 = 1, W/R bit set equal to high for write
operation.
ADD<11:8> = 0011b, address for the
channel-3’s phase delay register.
D<7:0> = 01010101, data to be written into the
channel-3’s phase delay register.
The SDI data is shifted in at the rising edge of
SCK.
In Broadcasting mode, the same set of data
shifted into the first chip’s SDI is sent to all the
MD1730 chips along the daisy chain. As shown
is Figure 4-3 when SPIB = 1 an internal switch
connects the SDI and SDO directly.
3. Once the complete data has been shifted in, the
CSN should be taken high to finish the writing
operation. The SDI data is latched into each
chip’s channel-3 phase delay register on the
rising edge of the CSN signal. CSN has to be
kept high for a minimum of 2-SCK cycles for the
data to be written into the appropriate register.
4.4.2 SPI READ OPERATION EXAMPLES
The following is a 2-byte reading example from the
register at ADD = 0011b (Channel-3’s phase delay
register) when SPIB = TXRW = 0.
1. The read operation starts with setting CSN to
low.
2. The SCK clock is used to shift in the following
SDI data:
D12 = 0, W/R bit set equal to high for read
operation.
ADD<11:8> = 0011b, address for channel-3’s
phase delay register.
D<7:0> = X, for a Read operation the data field
is don’t’ care.
The SDI data is shifted in at the rising edge of
SCK.
3. Once the complete data has been shifted into
the SPI the CSN is taken high. While CSN is
high the MD1730 fetches the data located at
ADD<11:9> = 0011b and places it in its internal
shift register.
4. Once the complete data has been shifted in, the
CSN should be taken high to finish the reading
operation. While CSN is high the MD1730
fetches the data located at ADD<11:9> = 0011b
and places it in its internal shift register. CSN
has to be kept high for a minimum of 2-SCK
cycles for the data to be fetched and placed into
the internal shift register.
5. The CSN is taken low and during the next 13
SCK clock cycles, the fetched data in the
internal shift register is clocked out on the rising
edge of SCK from the SDO of the MD1730.
MD1730
DS20005586B-page 18 2016 Microchip Technology Inc.
FIGURE 4-1: SPI Register Read/Write Timing with SPIB = 0, TXRW = 0.
FIGURE 4-2: SPI Register Broadcasting Write Timing with SPIB = 1, TXRW = 0.
Note: When in SPIB = 1 mode, the SPI register READ operations are not available.
D12 D0
D1D11
SCK
SDI
CSN
SDO
t1
t2
t3 t4
t5t7
t8
t6
t9
SPIB
t10t11
TXRW
D12 D0
D1D11
SCK
SDI
CSN
SDO
t1
t2
t3 t4
t5t7
t12
t6
t9
SPIB
t10t11
TXRW
D12 D0
D1D11
2016 Microchip Technology Inc. DS20005586B-page 19
MD1730
FIGURE 4-3: Multiple MD1730 Devices SPI Daisy Chain Connections.
4.5 CW0~7 Output Timing
The CW output waveform transmission timing is crucial
to an ultrasound imaging system. Any small timing
variations on the output can degrade the phase noise
performance. The MD1730’s internal circuitry is
designed to ensure ultra-low phase noise. Figure 4-4
shows an example of the output waveform timing
diagram. The chip is enabled by taking the EN pin high.
Then using the SPI, channel-0’s and channel-1’s phase
delay registers (PHD0<7:0> and PHD1<7:0>) are
programmed with delays of 2 and 3 respectively. The
rest of the channels are set to a high impedance state
by programming the HIZ<7:0> register with data
11111100b. Furthermore, the frequency divider
register (CWFD<7:0>) is set to 4. After completing the
SPI operation the transmission starts by asserting
TXRW high. The phase delay counter starts counting
down after a two CLK cycle latency. This is illustrated in
Figure 4-4 for channel 0 and channel 1. In channel 0’s
case, the phase delay starts counting down from 2 to 0
after the latency and once the delay reaches 0 on the
next rising edge of CLK, the positive output appears on
the pin CW0. Based on the value of the CWFD<7:0>
register, after 4-CLK cycles the CW0 output toggles to
the negative supply rail. Subsequently, after 4-CLK
cycles at the negative rail, the output switches back
again to the positive supply rail, completing one full CW
output wave cycle. This process continues until the
TXRW pin deasserts low, which shuts the transmission
off and forces the channel into a high impedance state.
This same procedure applies to channel 1, which is
also depicted in Figure 4-4.
FIGURE 4-4: CW0~7 Output Timing Diagram.
SDI SDO
SCK CSN
TXRW
13bit Shift Reg.
SPIB
D0
Q12
0'
U2U8
TXRW
SCK
CSN
SDI
FPGA
SDO
U1
SPIB
0'
SDI SDO
SCK CSN
13bit Shift Reg.
SPIB
D0
Q12
0'
SDI SDO
SCK CSN
13bit Shift Reg.
SPIB
D0
Q12
CW0
VCW+
tdrCW tdfCW
VCW-
t13
CLKP
Hi Z
CW end
tdrCW
CW = HiZCH
(fCLK)
TXRW
PHD0 7:0 !
(Phase Delay
Time for Ch0)
TXRW
(if PHD0=2) 0
EN EN=1
tEN_ON
1
2
t14
(3-cycle CLK)
PHD1 7:0 !
(Phase Delay
Time for Ch1)
(if PHD1=3) 12
3
CW1
VCW+
VCW-
Hi Z CW = HiZCH
0
tdrCW
tdfCW
tdrCW
-1
-1
PHD 7:0 Start !
Count Down
(if CWFD[7:0]=4)
MD1730
DS20005586B-page 20 2016 Microchip Technology Inc.
FIGURE 4-5: Clock Buffers CKB0/1 Output Timing Diagram.
4.6 MD1730 Working with Two HV7321
The diagrams shown in Figure 4-6 and Figure 4-7
illustrate the MD1730 driving two HV7321s.
When the HV7321 is operated in the specific mode,
CW MODE = 1, along with the MD1730, the following
steps should be taken to ensure the combination
settings work correctly:
6. Apply all power supply rails to both chips and set
HV7321’s OEN = REN = PWS = 1 along with
MD1730’s EN = 1 to enable both chips. Set all
other control logic pins to zero.
7. Adjust the VCW+ and VCW- power supplies to
the required peak-to-peak voltage levels for CW
output transmission. Please note that a higher
peak-to-peak transmission voltage will result in
the MD1730 dissipating more power. The power
dissipation on the MD1730 is proportional to the
square of the peak-to-peak voltage.
8. Assert HV7321’s MODE pin high.
9. Program the MD1730 with the desired CW
frequency divider and delay settings for CW
transmission.
10. To place a channel in receive mode, set the
corresponding pins SEL, NEG, POS = 011b on
the HV7321. To place a channel to CW Transmit
mode, set the corresponding pins SEL, NEG,
POS to any other combination other than 011b
on HV7321. This will put that channel of the
HV7321 high voltage Tx output in High Z mode,
but turn the channel’s CWSW on.
In the case user wants a channel not in High Z or CW
Transmit mode, then similarly, to set the channel of
HV7321 to High Z and also set the MD1730’s
corresponding bit in the HIZ register to 1.
11. Once the system is ready to perform CW
Doppler measurement, assert TXRW high to
start the CW transmission on the selected
channels.
CKB0
tdrb tdfb
CLKP
(fCLK)
CKB1
CBE0
CBE1
trb trb
tcbe
2016 Microchip Technology Inc. DS20005586B-page 21
MD1730
FIGURE 4-6: MD1730 Works with Two HV7321 4-Channel ±80V 2.6A 5-Level Ultrasound Pulsers.
V
C W -
-1 to -6V
G ND T her.
PAD
-10V
S UB
V
G N
C NF
E N
C W 0
VNF
C L KP
C L KN
S DO
S DI
C S N
S P I
S C K
C W 3
VP F
C W
F re. Dvdr
& P hase
Delay
C W 2
C W 1
T X RW
HIZ[ 7:0]
VLL
C L K
C L K
C B E 1
C K B0
C h0
S P IB
LV DS CL K
C B E 0 ,1
VLL
C B E 0
C K B1
U1 MD1730
V C W +
V C W -
+10V
V
G P
+2.5V
V
LL
+1 to +6V
V
C W +
+5V
V
DD
C P F
C h7
C W 4
C W 7
C W 6
C W 5
VNF
VP F
V C W +
V C W -
C h1~6
X0
0 to+80V
V P F 1
VNN1
V P P 1
R G ND
T X 0
-0 to-80V
V P P 0
VNN0
0 to-80V
0 to+80V
1 of 4 C hannels
+5V
V
DD
Decode
&
Level
S hift
C W IN0
NE G 0
S E L0
NE G 3
S E L3
C W IN3 U2 HV 7321
G ND
OT P N
+2.5V
V
LL
P W S
P O S 3
VS UB
S UB
MODE
R E N
C L K
P O S 0
T X 1-3
R X1-3
R x0
R X0
V P F 0
V N F 0
V N F 1
R G ND
R T ZS W
C W S W
T R S W
R XDMP
T R S W
+10V
V
G P
-10V
OE N
V
G N
C W IN2
C W IN1
T x F P G A I /O s
To
Oth er
ICs
C T R N [3 :0 ]
OT P
DT [63:0]
X4
0 to+80V
V P F 1
VNN1
V P P 1
R G ND
T X 0
-0 to-80V
V P P 0
VNN0
0 to-80V
0 to+80V
1 of 4 C hannels
+5V
V
DD
Decode
&
Level
S hift
C W IN0
NE G 0
S E L0
NE G 3
S E L3
C W IN3 U3 HV 7321
G ND
OT P N
+2.5V
V
LL
P W S
P O S 3
VS UB
S UB
MODE
R E N
C L K
P O S 0
T X 1-3
R X1-3
R x4
R X0
V P F 0
V N F 0
V N F 1
R G ND
R T ZS W
C W S W
T R S W
R XDMP
T R S W
+10V
V
G P
-10V
OE N
V
G N
C W IN2
C W IN1
+2.5V
To
Oth er
ICs
To
Oth er
ICs
MD1730 & 2x HV7321 Diagram
MD1730
DS20005586B-page 22 2016 Microchip Technology Inc.
FIGURE 4-7: MD1730 Working with Two HV7321 Pulsers Pinout and Package.
4.7 CW Transmission Clock
The input clock of the MD1730, used for CW
transmission, can be connected either differentially or
single-ended. Figure 4-8 shows the LVDS differential
implementation for the transmission clock. Here the
CLKP and the CLKN pins are directly driven by a LVDS
clock buffer. It is highly recommended that a
multiple-output LVDS clock buffer IC is used, such as
the SY89832U, and that a 100 termination resistor is
placed very close to the CLKP and CLKN pins. For
successful transmission of the LVDS signal over
differential traces, the following guidelines should be
followed while laying out the PCB board:
To ensure minimal reflections and to maintain the
receiver’s common-mode noise rejection, keep
the differential traces as short as possible
between the clock buffer IC and the CLKP/CLKN
pins of the MD1730.
To reduce skew, the electrical lengths between
differential LVDS traces should be identical. The
arrival of one differential signal before the other
will create a phase difference between the signal
pairs, which would create clock skew and impair
the system performance.
Minimize the number of vias or other
discontinuities in the signal path. To avoid
discontinuities, arcs or 45-degree traces are
recommended instead of 90-degree turns.
Any parasitic loading, such as capacitance, must
be present in equal amounts on each differential
line.
Figure 4-9 illustrates the two cases for the MD1730
used in a single-ended configuration. In these cases,
one of the clock input pins, CLKP or CLKN, is
connected to the VLL/2 voltage level and bypassed to
ground with a 0.1 uF bypass capacitor. Each bypass
capacitor must be placed very close to the MD1730.
The other clock input pin connects to the main clock
line. The PCB traces on the clock line must be
designed for a 50 impedance with respect to the PCB
ground place. Also, the clock pin must be terminated
with a small 50 SMT resistor.
Generally, the LVCMOS input configuration provides
better CW phase noise performance due to its higher
amplitude swing as compared to the LVDS
configuration. However, if the user needs a very high
frequency clock transmission, such as 160 MHz-
240 MHz range for a higher phase delay resolution,
then LVDS should be used because it provides a better
PCB clock trace distribution.
CPF1
VPP1
TX3
RXO3
RGND
RXO1
TX1
CPOS
CNEG
T X2
RXO2
RGND
RXO3
T X3
VPP1
CPF1
CWIN0
SEL1
NEG1
POS1
CWIN1
SEL2
NEG2
POS2
CWIN2
SEL3
REN
VLL
GND
CLK
PWS
OEN
POS0
NEG0
SEL0
MODE
VD D1
GDN
VGN
VPP0
VPP0
CPF0
CNF0
VN N0
VN N0
VN N2
VN N1
CNF1
NEG3
POS3
CWIN3
OTP1
VD D1
GND
VGP
VPP0
VPP0
CFP0
VN F0
VN N0
VN N0
VN N2
VN N1
CNF 1
CPF1
VPP1
T X3
RXO3
RGND
RXO1
TX1
CPOS
CNEG
TX2
RXO2
RGND
RXO3
TX3
VPP1
CPF1
CWIN0
SEL1
NEG1
POS1
CWIN1
SEL2
NEG2
POS2
CWIN2
SEL3
REN
VLL
GND
CLK
PWS
OEN
POS0
NEG0
SEL0
MODE
VD D1
GDN
VGN
VPP0
VPP0
CPF0
CNF0
VN N0
VN N0
VN N2
VN N1
CNF1
NEG3
POS 3
CWIN3
OTP1
VD D1
GND
VGP
VPP 0
VPP 0
CFP0
VN F0
VN N0
VN N0
VN N2
VN N1
CNF 1
,sϳϯϮϭ
9x9mm
QFN-64
,sϳϯϮϭ
9x9mm
QFN-64
To Probe & Rx LNA
CW 0
CK B0
CW 2
CW 3
CW 4
CW 5
CW 6
CK B1
EN
VD D
VC W+
CP F
VCW-
CN F
VC W+
CP F
VC W-
CN F
GN D
CLKW
CLKE
CSE
SC K
SD I
SD O
CB E1
VG PVG N
DϭϳϯϬ
6x6mm
QFN-36
TXRW
CW 1
CW 7
VG N
VLL
CB E0
SP IB
GN D
2016 Microchip Technology Inc. DS20005586B-page 23
MD1730
FIGURE 4-8: LVDS Differential Transmission Clock.
FIGURE 4-9: LVCMOS Single-Ended Transmission Clock.
100
VCC
0'
U
2
U
4
U
10'0'
EN
TXRW TXRW
TXRW
TXRW
EN ENEN
EN
CLKP CLKN CLKP CLKN CLKP CLKN
Differ tial LVDSHQ 
Clock Line-Pair
CLK Buffer
2.5V
VLL
2.5V
VLL
2.5V
VLL
2.5V
Clock
Source
(from FPGA)
Q0
Q1
... ...
Q3
IN
100 100
SY89832U
GND
GND GND
GND
2.5V
CLK0
U2
U10'
TXRWEN
U4
0'
PL133-47
CLK Buffer
EN
TXRW TXRW
TXRW
EN EN
EN
0'
CLKP CLKNCLKP CLKN CLKP CLKN
1.25V
DC
0.1 F 0.1 F 0.1 F
Single-Ended
LVCMOS Clock Line
VLL
2.5V
VLL VLL
2.5V 2.5V
80-150MHz
Clock OSC.
(from FPGA)
REF CLK1
CLK3
GND 33ohm
2.5V
CLK0
U2
U10'
TXRWEN
U4
0'
PL133-47
CLK Buffer
EN
TXRW TXRW
TXRW
EN EN
EN
0'
CLKP CLKNCLKP CLKN CLKP CLKN
1.25V
DC
0.1 F 0.1 F 0.1 F
Single-Ended
LVCMOS Clock Line
VLL
2.5V
VLL VLL
2.5V 2.5V
80-150MHz
Clock OSC.
(from FPGA)
REF CLK1
CLK3
GND 33ohm
GND GND GND
GND GND GND
MD1730
DS20005586B-page 24 2016 Microchip Technology Inc.
NOTES:
2016 Microchip Technology Inc. DS20005586B-page 25
MD1730
5.0 PACKAGING INFORMATION
5.1 Package Marking Information
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC® designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
36-Lead VQFN (6x6x0.9 mm) Example
XXXXXXXX
XXXXXXXX
YYWWNNN
PIN 1 PIN 1
MD1730
1624256
3
e
MD1730
DS20005586B-page 26 2016 Microchip Technology Inc.
B
A
0.10 C
0.10 C
0.10 C A B
0.05 C
(DATUM B)
(DATUM A)
C
NOTE 1
1
2
N
2X
TOP VIEW
SIDE VIEW
BOTTOM VIEW
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
Note:
NOTE 1
0.10 C A B
0.10 C A B
0.10 C
0.08 C
Microchip Technology Drawing C04-272B-M2 Sheet 1 of 2
2X
36X
D
E
1
2
N
(A3)
A
A1
D2
E2
L36X b
e
K
36-Terminal Very Thin Plastic Quad Flatpack No-Lead (M2) - 6x6x1.0mm Body [VQFN]
SMSC Legacy "Sawn Quad Flatpack No-Lead [SQFN]"
SEATING
PLANE
2016 Microchip Technology Inc. DS20005586B-page 27
MD1730
Microchip Technology Drawing C04-272B-M2 Sheet 2 of 2
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
Note:
Number of Terminals
Overall Height
Terminal Width
Overall Width
Overall Length
Terminal Length
Exposed Pad Width
Exposed Pad Length
Terminal Thickness
Pitch
Standoff
Units
Dimension Limits
A1
A
b
D
E2
D2
A3
e
L
E
N
0.50 BSC
0.20 REF
3.60
3.60
0.50
0.18
0.80
0.00
0.25
6.00 BSC
0.60
3.70
3.70
0.90
0.02
6.00 BSC
MILLIMETERS
MIN NOM
36
3.80
3.80
0.75
0.30
1.00
0.05
MAX
K 0.550.45 -
REF: Reference Dimension, usually without tolerance, for information purposes only.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
1.
2.
3.
Notes:
Pin 1 visual index feature may vary, but must be located within the hatched area.
Package is saw singulated
Dimensioning and tolerancing per ASME Y14.5M
Terminal-to-Exposed-Pad
36-Terminal Very Thin Plastic Quad Flatpack No-Lead (M2) - 6x6x1.0mm Body [VQFN]
SMSC Legacy "Sawn Quad Flatpack No-Lead [SQFN]"
MD1730
DS20005586B-page 28 2016 Microchip Technology Inc.
RECOMMENDED LAND PATTERN
Dimension Limits
Units
C2
Optional Center Pad Width
Contact Pad Spacing
Optional Center Pad Length
Contact Pitch
Y2
X2
3.80
3.80
MILLIMETERS
0.50 BSC
MIN
E
MAX
5.60
Contact Pad Length (X36)
Contact Pad Width (X36)
Y1
X1
1.10
0.30
Microchip Technology Drawing C04-2272B-M2
NOM
SILK SCREEN
1
2
36
C1Contact Pad Spacing 5.60
Thermal Via Diameter V
Thermal Via Pitch EV
0.30
1.00
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Notes:
Dimensioning and tolerancing per ASME Y14.5M
For best soldering results, thermal vias, if used, should be filled or tented to avoid solder loss during
reflow process
1.
2.
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
Note:
EV
EV
C2
C1
X2
Y2
E
X1
Y1
G1
ØV
G2
36-Terminal Very Thin Plastic Quad Flatpack No-Lead (M2) - 6x6x0.9 mm Body [VQFN]
SMSC Legacy "Sawn Quad Flatpack No-Lead [SQFN]"
Contact Pad to Center Pad (X36) G1 0.35
Space Between Contact Pads (X32) G2 0.20
2016 Microchip Technology Inc. DS20005586B-page 29
MD1730
APPENDIX A: REVISION HISTORY
Revision B (November 2016)
The following is the list of modifications:
Updated Section “Product Identification
System”.
Minor typographical corrections.
Revision A (September 2016)
Original Release of this Document.


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MD1730

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