ADXL190

a FEATURES iMEMS® Single Chip IC Accelerometer 40 Milli-g Resolution Low Power 2 mA 400 Hz Bandwidth +5.0 V Single Supply Operation 2000 g Shock Survival APPLICATIONS Shock and Vibration Measurement Machine Health Shipping Recorders Military Fuze, Safe and Arm Low Cost ؎100 g Single Axis Accelerometer with Analog Output ADXL190* FUNCTIONAL BLOCK DIAGRAM TP (DO NOT CONNECT) +VS 2 5k⍀ DEMODULATOR CLOCK 9 +VS 0.1␮F ADXL190 GAIN AMP SENSOR VOUT BUFFER AMP 25k⍀ SELF-TEST COM ZERO g ADJUST GENERAL DESCRIPTION The ADXL190 is a complete acceleration measurement system on a single monolithic IC. It contains a polysilicon surfacemicromachined sensor and signal conditioning circuitry to implement an open-loop acceleration measurement architecture. The ADXL190 is capable of measuring both positive and negative accelerations up to ± 100 g, making it suitable for shock and vibration measurement. Typical noise floor is 4 mg/√Hz allowing signals below 40 milli-g to be resolved. The ADXL190 can measure both dynamic accelerations, (typical of vibration) or static accelerations, (such as inertial force or gravity). The ADXL190 has a two-pole Bessel switched-capacitor filter. Bessel filters, sometimes called linear phase filters, have a step response with minimal overshoot and a maximally flat group delay. The –3 dB frequency of the poles is preset at the factory to 400 Hz. These filters are also completely self-contained and buffered, requiring no external components. The product fea...