MSQA Series Digital Output Quartz Flexible Accelerometer

Overview
This series of products is based on traditional quartz flexible accelerometers, highly integrating the current-frequency conversion circuit with the servo circuit of the quartz accelerometer to achieve a digital servo closed-loop circuit. The products feature frequency output, small size, high precision, and strong anti-interference capabilities, and can be applied to high-precision rotary modulation systems.

Features
● High precision, high stability
● Frequency output
● Miniaturization
● It has a built-in SMC18B20 temperature sensor output.

Physics/Electricals
● External dimensions: Φ 22 mm x 24 mm
● Weight: ≤ 30g
● Operating temperature: -55~+85 ℃
● Operating voltage: ±(12~18)VDC
● Insulation resistance: 50MΩ, @50VDC
● Power consumption: ≤700mw@±15VDC
● Current consumption: <25mA@±15VDC
● Random vibration (without power): 6.06 grams, (20-2000) Hz
● Impact (without power): 100g, 8-12ms, halfsine

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PIN definition

No.	PIN	Definition
1	ML	Accelerometer output
2	lfin	Current input
3	Vs-	Negative power supply
4	Vs+	Positive power supply
5	AGND	Ground
6	F+	Frequency output +
7	F-	Frequency output -
8	DQ	Temperature output

Specifications

Series Items	G	Z	Y	D	unit
Measurement range	±2/20/35/50/60/90/120				g
Frequency Standard	256/512/1024				kHz
Bias	≤±4	≤±5	≤±5	≤±7	mg
Bias temperature coefficient (-55~+85 ℃ )	≤±15	≤±30	≤±50	≤±80	μg / ℃
Monthly composite error of bias (55 ℃ , 1 month, 1σ)	≤15	≤30	≤50	≤80	μg
Full-temperature bias repeatability	≤15	≤30	≤50	≤80	μg
Scale factor	Determined based on range and frequency standard
Scale factor temperature coefficient (-55~+85 ℃ )	≤±15	≤±30	≤±50	≤±80	ppm/ ℃
Scale factor monthly composite error (55 ℃ 1 month, 1σ)	≤15	≤30	≤50	≤80	ppm
Scale factor, full-temperature repeatability	≤15	≤30	≤50	≤80	ppm
Nonlinearity in a 1g gravitational field	≤±15	≤±25	≤±30	≤±50	ppm
Asymmetry of scale factors (positive and negative)	≤±500				ppm
Second-order nonlinear coefficients	≤2× 10⁻⁵				g/g2
Startup time	≤3				s
0g Startup repeatability	≤20		≤30		μg
1g startup repeatability	≤20		≤30		μg
Threshold	≤5				μg
Resolution	≤5				μg
Bandwidth	≥800				Hz (-3dB)

Tomda Technologies Co., Limited