Microchip MCP4725 Handleiding

Microchip Niet gecategoriseerd MCP4725

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2007-2022 Microchip Technology Inc. and its subsidiaries DS20002039E
MCP4725
Features
• 12-Bit Resolution
• On-Board Nonvolatile Memory (EEPROM)
• ±0.2 LSB DNL (typical)
• External A0 Address Pin
• Normal or Power-Down Mode
• Fast Settling Time: 6 µs (typical)
• External Voltage Reference (VDD)
• Rail-to-Rail Output
• Low Power Consumption
• Single-Supply Operation: 2.7V to 5.5V
• I2C Interface:
- Eight Available Addresses
- Standard (100 kbps), Fast (400 kbps), and
High-Speed (3.4 Mbps) Modes
• Small 6-Lead SOT-23 and DFN Package Options
• Extended Temperature Range: -40°C to +125°C
Applications
• Set Point or Offset Trimming
• Sensor Calibration
• Closed-Loop Servo Control
• Low Power Portable Instrumentation
• PC Peripherals
• Data Acquisition Systems
Block Diagram
General Description
The MCP4725 is a low-power, high accuracy, single
channel, 12-bit buffered voltage output Digital-to-
Analog Converter (DAC) with nonvolatile memory
(EEPROM). Its on-board precision output amplifier
allows it to achieve rail-to-rail analog output swing.
The DAC input and configuration data can be
programmed to the nonvolatile memory (EEPROM) by
the user using I2C interface command. The nonvolatile
memory feature enables the DAC device to hold the
DAC input code during power-off time, and the DAC
output is available immediately after power-up. This
feature is very useful when the DAC device is used as
a supporting device for other devices in the network.
The device includes a Power-on-Reset (POR) circuit to
ensure reliable power-up and an on-board charge
pump for the EEPROM programming voltage. The
DAC reference is driven from VDD directly. In power-
down mode, the output amplifier can be configured to
present a known low, medium, or high resistance
output load.
The MCP4725 has an external A0 address bit selection
pin. This A0 pin can be tied to VDD or VSS of the user’s
application board.
The MCP4725 has a two-wire I2C compatible serial
interface for standard (100 kHz), fast (400 kHz), or high
speed (3.4 MHz) mode.
The MCP4725 is an ideal DAC device where design
simplicity and small footprint is desired, and for
applications requiring the DAC device settings to be
saved during power-off time.
The device is available in a small 6-pin SOT-23 and
DFN package.
Resistive
Power-on
Reset
Charge
Pump
EEPROM
I2C Interface Logic
Input
Register
DAC Register
Op
Amp
Power-down
Control
VDD
VSS
SCL SDA
VOUT
A0
String DAC
12-Bit Digital-to-Analog Converter with EEPROM Memory
MCP4725
DS20002039E-page 2
2007-2022 Microchip Technology Inc. and its subsidiaries
Package Types
3
VDD
SCL
SDA
VSS
A0
SOT-23-6
VOUT
2
1
4
5
6
MCP4725
SDA
SCL V SS
VDD
1
2
3
6
5
4
VOUT
A0
6-Lead DFN
Note: The DFN package features an Exposed Pad on
the bottom of the package.
See Table 3-1 for pin descriptions.
2007-2022 Microchip Technology Inc. and its subsidiaries DS20002039E-page 3
MCP4725
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
VDD...................................................................................6.5V
All inputs and outputs w.r.t V
SS .................–0.3V to VDD+0.3V
Current at Input Pins ....................................................±2 mA
Current at Supply Pins ...............................................±50 mA
Current at Output Pins ...............................................±25 mA
Storage Temperature ...................................-65°C to +150°C
Ambient Temp. with Power Applied ..............-55°C to +125°C
ESD protection on all pins   6 kV HBM, 400V MM
Maximum Junction Temperature (T
J) ......................... +150°C
† Notice: Stresses above those listed under “Absolute
Maximum ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation
of the device at these or any other conditions above those
indicated in the operation listings of this specification is not
implied. Exposure to maximum rating conditions for
extended periods may affect device reliability
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply at V
DD = + 2.7V to 5.5V, VSS = 0V,
RL = 5 kΩ from VOUT to VSS, CL = 100 pF, TA = -40°C to +125°C. Typical values are at +25°C.
Parameter Sym. Min. Typ. Max. Units Conditions
Power Requirements
Operating Voltage VDD 2.7 — 5.5 V
Supply Current IDD — 210 400 µA Digital input pins are
grounded, Output pin (VOUT)
is not connected (unloaded),
Code = 000h
Power-Down Current IDDP — 0.06 2.0 µA VDD = 5.5V
Power-On-Reset
Threshold Voltage
VPOR — 2 — V
DC Accuracy
Resolution n 12 — — Bits Code Range = 000h to FFFh
INL Error INL — ±2 ±14.5 LSB Note 1
DNL DNL -0.75 ±0.2 ±0.75 LSB Note 1
Offset Error VOS 0.02 0.75 % of FSR Code = 000h
Offset Error Drift ΔVOS /°C — ±1 — ppm/°C -45°C to +25°C
— ±2 — ppm/°C +25°C to +85°C
Gain Error GE -2 -0.1 2 % of FSR Code = FFFh,
Offset error is not included.
Gain Error Drift ΔGE/°C — -3 — ppm/°C
Output Amplifier
Phase Margin pM
— 66 — Degree(°) CL = 400 pF, RL =
Capacitive Load Stability CL — — 1000 pF RL = 5 kΩ, Note 2
Slew Rate SR — 0.55 — V/µs
Short Circuit Current ISC — 15 24 mA VDD = 5V, VOUT = Grounded
Output Voltage Settling
Time
TS — 6 — µs Note 3
Note 1: Test Code Range: 100 to 4000.
2: This parameter is ensured by design and not 100% tested.
3: Within 1/2 LSB of the final value when code changes from 1/4 to 3/4 (400h to C00h) of full scale range.
4: Logic state of external address selection pin (A0 pin).

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MCP4725

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