GA100 Single Axis, Closed-Loop Accelerometer

The Gladiator Technologies GA100 is a high-performance, single-axis MEMS accelerometer featuring advanced closed-loop force-rebalance technology for precision inertial sensing applications.

The GA100 uses a closed-loop feedback system that applies a rebalance force to the proof mass, compensating for inertial forces generated by external acceleration. This architecture delivers excellent bias stability, scale factor linearity and reduced vibration rectification error.

With a ±15 g measurement range, low noise and multiple performance configurations, the GA100 is designed for demanding aerospace, defense, navigation, stabilization and precision motion measurement applications.

Key Features

Closed-Loop MEMS Technology – Advanced force-rebalance architecture for precise acceleration measurement and improved stability.
Single-Axis Measurement – ±15 g sensing range across all GA100 configurations.
Ultra-Low Noise – VRW as low as 20 µg/√Hz for precision inertial sensing.
Excellent Bias Repeatability – Long-term bias repeatability as low as 250 µg.
Outstanding Short-Term Stability – As low as 7/60 µg.
High Scale Factor Stability – Long-term scale factor performance as low as 400 ppm.
High Bandwidth – Greater than 300 Hz for dynamic motion measurement.
Reduced Vibration Rectification – As low as 25 µg/g² RMS.
Factory-Calibrated Performance – Calibrated temperature range from -55°C to +95°C.
Digital SPI Interface – Enables integration into advanced inertial sensing systems.

GA100 Technical Specifications

Performance Specifications

Parameter	GA100-015-100A	GA100-015-100B	GA100-015-100C	GA100-015-100D
Measurement Range	±15 g	±15 g	±15 g	±15 g
Long-Term Bias Repeatability	2 mg	1 mg	500 µg	250 µg
Short-Term Stability*	20/200 µg	14/150 µg	14/100 µg	7/60 µg
VRW	40 µg/√Hz	25 µg/√Hz	25 µg/√Hz	20 µg/√Hz
Temperature Sensitivity	400 µg/°C	300 µg/°C	200 µg/°C	150 µg/°C
Temperature Residual Error	350 µg	200 µg	200 µg	150 µg
Turn-On to Turn-On Repeatability*	250 µg	100 µg	50 µg	50 µg
Long-Term Scale Factor	700 ppm	600 ppm	500 ppm	400 ppm
Short-Term Scale Factor Stability	150 ppm	150 ppm	100 ppm	100 ppm
Bandwidth	>300 Hz	>300 Hz	>300 Hz	>300 Hz
Vibration Rectification	40 µg/g² RMS	25 µg/g² RMS	25 µg/g² RMS	25 µg/g² RMS

GA100 Closed-Loop vs. GA50 Open-Loop – Which Accelerometer Should You Choose?

The key difference between the GA100 and GA50 lies in how acceleration is measured.

The GA100 uses closed-loop force-rebalance technology, continuously applying a feedback force to keep the sensing mass near its reference position. This architecture is particularly attractive for precision inertial applications where bias stability, scale factor performance and vibration rectification error are critical. The GA100 offers a ±15 g measurement range, digital SPI interface and bandwidth greater than 300 Hz.

The GA50 uses open-loop MEMS technology, measuring the displacement of the sensing mass without an active force-rebalance mechanism. Its compact design, low power consumption and analog output make it attractive for space-constrained systems. With ±5 g, ±40 g and ±70 g options, it also provides greater flexibility in measurement range.

Which one should you choose?

Choose GA100 when closed-loop operation, digital integration and demanding stability requirements are priorities.
Choose GA50 when ultra-low noise, compact size, low power consumption or a wider measurement range are more important.

Neither technology is universally superior. The best choice depends on the specific accuracy, dynamic range, environmental and integration requirements of the application.

Environmental Specifications

Parameter	Specification
Operating Shock	40 g, 11 ms, half-sine
High Shock	500 g, 1 ms, half-sine
Operating Vibration	12 g RMS (20 Hz to 2 kHz)
Calibrated Temperature Range	-55°C to +95°C
Non-Operating Temperature Range	-55°C to +100°C

Electrical & Mechanical Specifications

Parameter	Specification
Input Voltage	+5.0 V ±0.25 V
Current Consumption	50 mA
Data Interface	SPI
Mass	<7 g
Dimensions	23 × 23 × 7.9 mm
US Export Classification	7A994
ITAR Status	Non-ITAR