Chip Atomic Clock

Product Overview

Features:

Lightweight and compact

Low power consumption

Small size

Wide operating temperature

SA.45 compatible

Key Specifications:

Frequency Accuracy: Better than 5E-11

Frequency Drift Rate: Better than 3E-11/day

Supply Voltage: +3.3 V

Power-on Characteristics: Lock within 4 minutes

External Second Synchronization: 1PPS synchronization accuracy ≤ 50ns

Holdover Performance: Better than 5us (24-hour acclimation, 24-hour holdover)

Dimensions: 41 x 35 x 12 mm³

Weight: Less than 40g

Steady-state Power Consumption: ≤ 130mW (room temperature)

Startup Power Consumption: ≤ 200mW

Operating Temperature: -10°C to +70°C

Main Applications:

Portable measuring instruments, submarine detectors, marine exploration equipment

Technical Indicators

	Performance Indicator	QT40G CPT Atomic Clock	QT45 Chip-Scale Clock	QT55 CPT Clock	QT31 Clock
1	Output Frequency	10 MHz	10 MHz 16.384 MHz 20 MHz 24.576 MHz	10 MHz	10 MHz
2	Factory Frequency Offset	≤±5E-11	≤±5E-11	≤±5E-11	≤±5E-11
	Frequency Stability	≤1E-10/s ≤3E-11/10s ≤1E-11/100s	≤3E-10/s ≤1E-10/10s ≤3E-11/100s	≤5E-11/s ≤3E-11/10s ≤1E-11/100s	≤5E-11/s ≤1.8E-11/10s ≤7E-12/100s
4	Frequency Drift Rate	≤1E-11/24h	≤3E-11/24h	≤5E-12/24h	≤5E-12/24h
	After 1 Day of Operation	≤8E-10	≤1E-9	≤1E-9	≤4E-11
5	Frequency Temperature Coefficient	(-5~60°C)	(-55~+80°C)	(-10~+70°C)	(-40~80°C)
		≤2E-10 (+20~+40°C)
6	Frequency Accuracy (Locked to External 1PPS after 2h)	≤±1E-12/24h	≤±1E-12/24h	≤±1E-12/24h	—
7	Lock Time at Startup	≤5 min	≤4 min	≤10 min	≤7 min (at room temp) ≤15 min (-5°C)
8	Holdover Performance (after 24h disciplining)	≤3μs/24h	≤5μs/24h	≤1μs/24h	—
9	Power Consumption	Steady: ≤2W (3.3V) Peak: ≤5W (3.3V)	Steady: <130 mW (3.3V)	Steady: <3W (12V) Peak: ≤14W (12V)	Steady: ≤6W (5V) Peak: ≤20W (5V)
10	Operating Temperature	-55~+80°C	-10~+70°C	-40~+80°C	-5~+60°C
11	Dimensions (mm)	41 × 35 × 12	41 × 35 × 12	50.8 × 50.8 × 17.8	50.8 × 50.8 × 25

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