GENERAL DESCRIPTION

The ADXL195/ADXL295 are dual spectrum accelerometers that measure baseband acceleration in up to two axes (XL-X and XL-Y), as well as high frequency (HF) acceleration energy. Identical, independent X and Y sense structures are implemented to achieve the best possible fail-safe performance.

FEATURES

Single-axis (ADXL195) and dual-axis (ADXL295) configurations

±120 g baseband acceleration channel

   12-bit resolution at 62.5 mg/LSB

   512 kHz data interpolation rate

40 gAVG high frequency signal processing channel

   10-bit resolution at 83.3 mg avg/LSB

   128 kHz data interpolation rate

Sensor frequency response down to dc

On-demand electromechanical self-test

On-demand HF signal injection self-test

Fully differential circuitry for high resistance to EMI/RFI

Independent x- and y-axis sense structures for robust

   FMEA performance

Independent x- and y-axis arming thresholds

Low noise

   1 LSB rms (12-bit baseband acceleration channel)

   2 LSB rms (10-bit high frequency acceleration channel)

Qualified for automotive applications

Temperature range: −40°C to +105°C

3.3 V and 5 V operation

APPLICATIONS

  Enhanced crash sensing

  Shock detection