Microchip CSAC-SA45S Handleiding

Microchip Niet gecategoriseerd CSAC-SA45S

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SA.45s CSAC and RoHS CSAC

Opons 001 and 003

Chip-Scale Atomic Clock

microchip.com

Features

• Power consumption <120 mW

• Less than 17 cc volume,

1.6" × 1.39" × 0.45"

• 10 MHz CMOS-compatible output

• 1PPS output and 1PPS input for synchronization

• RS-232 interface for monitoring and control

• Short term stability (Allan Deviation) of 3.0 × 10–10 at τ =1

sec

• Applications1

• GPS receivers

• Backpack radios

• Anti-IED jamming systems

• Autonomous sensor networks

• Unmanned vehicles

• Underwater sensor systems

• Stability for various other communication and transmis-

sion applications

• RoHS-Compliant CSAC

• RoHS 2 (Directive 2011/65/EU)

• Wide storage temperature: 100 °C

The CSAC is not tested, qualied, or rated for space applications.

With an extremely low power consumption of <120 mW and

a volume of <17 cc, the Microchip SA.45s Chip Scale Atomic

Clock (CSAC) brings the accuracy and stability of an atomic

clock to portable applications for the rst time. The CSAC is

also available in a RoHS-compliant form.

The SA.45s provides RF and 1PPS outputs at standard CMOS

levels, with short-term stability (Allan Deviation) of 3.0 × 10

–10

at τ = 1 sec, typical longterm aging of <9 × 10–10/month, and

maximum frequency change of ±5 × 10–10 over an operating

temperature range of –10°C to 70°C.

The SA.45s CSAC accepts a 1PPS input that may be used to

synchronize the unit’s 1PPS output to an external reference

clock with ±100 ns accuracy. It also use the 1PPS input to

discipline its phase and frequency to within 1 ns and 1.0 ×

10–12, respectively.

A standard CMOS-level RS-232 serial interface is built in to

the SA.45s. This is used to control and calibrate the unit and

also to provide a comprehensive set of status monitors. The

interface is also used to set and read the CSAC’s internal

time-of-day clock.

Specicaons1

Electrical

RF Outputs

Frequency 10 MHz (option 001)

16.384 MHz (option 003)

Format CMOS

Amplitude 0 V to VCC

Load Impedance 1 MΩ

Quantity 1

1PPS Output

Rise/fall Time

(10%–90%) at Load

Capacitance 10 pF

<10 ns

Pulse Width 100 μs (Option 001)

97.656 μs (Option 003)

Level 0 V to VCC

Logic High (VOH) Min 2.80 V

Logic Low (VOL) Max 0.30 V

Load Impedance 1 MΩ

Quantity 1

1PPS Input

Format Rising edge

Low Level <0.5 V

High Level 2.5 V to VCC

Load Impedance 1 MΩ

Quantity 1

Serial Communications

Protocol RS-232

Format CMOS 0 V to VCC

Tx/Rx Impedance 1 MΩ

Baud Rate 57600

Built-In Test Equipment (BITE) Output

Format CMOS 0 V to VCC

Load Impedance 1 MΩ

Logic 0= Normal operation

1= Alarm

Power Input

Operating <120 mW

Warmup <140 mW

Input Voltage (VCC) 3.3 ± 0.1 VDC

1At input voltage VCC = 3.3 VDC

and ambient temperature = 25 °C, unless otherwise specied.

Environmental

Specication Details

Operating Temperature –10 °C to 70 °C

Maximum Frequency

Change over Operating

Temp Range (Maximum

Rate of Change 0.5 °C per

Minute)

±5 × 10–10

Frequency Change Over

Allowable Input Voltage

Range

±4 × 10–10

Magnetic sensitivity (≤2.0

Gauss) ±9 × 10–11/Gauss

Radiated Emissions

Compliant to FCC part 15,

Class B, when mounted properly

onto host PCB

Vibration

Maintains lock under MIL-STD-

810G, Operational, 7.7 grms per

Figure 514.7E-1. Category 24

Humidity 0%–95% RH per MIL-STD-810,

Method 507.4

Storage and Transport (Non-operating)

Temperature –55 °C to 85 °C

Temperature (RoHS-

Compliant) –55 °C to 100 °C

Vibration MIL-STD-810G, 7.7 grms per

Figure 514.7E-1. Category 24

Shock MIL-STD-202-213A, Condition E,

1000 g

Performance Parameters

Specication Details

Warm-up Time <180 s

Analog Tuning

Range: ±2.2 × 10–8

Resolution: 1 × 10–11

Input: 0 V–2.5 V into 100 kΩ

Digital Tuning Range: ±1 × 10–6

Resolution: 1 × 10–12

The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies.

Phase Noise (SSB)

Frequency Option 001 Option 003

1 Hz <–50 dBc/Hz <–46 dBc/Hz

10 Hz <–70 dBc/Hz <–66 dBc/Hz

100 Hz <–113 dBc/Hz <–104 dBc/Hz

1 kHz <–128 dBc/Hz <–128 dBc/Hz

10 kHz <–135 dBc/Hz <–135 dBc/Hz

100 kHz <–140 dBc/Hz <–140 dBc/Hz

Frequency Accuracy

Maximum Oset at

Shipment ±5 × 10–11

Maximum Retrace

(48 hrs O) ±5 × 10–10

1 PPS Sync ±100 ns

Aging

Type2SA.45s

Monthly <9 × 10–10

Yearly <1 × 10–8

After 30 days of continuous operation.

Short-Term Stability (Allan Deviaon)

Type SA.45s

τ = 1 s 3 × 10–10

τ = 10 s 1 × 10–10

τ = 100 s 3 × 10–11

τ = 1000 s 1 × 10–11

Physical

Type SA.45s

Weight <35 g (<1.23 oz)

Size 1.6" × 1.39" × 0.45"

MTBF >100,000 hours

RoHS RoHS 2 (Directive 2011/65/EU)

Solder

Type Details

Standard

Hand solder using 63/37 tin/lead solder

with maximum soldering tip of 329 °C

(625 °F)

RoHS-

Compliant

Hand solder using 96.5/3/0.5 tin/

silver/copper with maximum solder tip

temperature of 370 °C (698 °F) and a

dwell time of <5 s.

Ordering Informaon

Part Number Description Output

Frequency

090-02984-001 Chip-scale atomic clock

option 001 10 MHz

090-02984-003 Chip-scale atomic clock

option 003 16.384 MHz

090-03240-001

RoHS-compliant chip-

scale atomic clock option

001

10 MHz

090-03240-003

RoHS-compliant chip-

scale atomic clock option

003

16.384 MHz

Product specificaties

Merk:	Microchip
Categorie:	Niet gecategoriseerd
Model:	CSAC-SA45S

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