ADXL50

The ADXL50 is a complete acceleration measurement system on a single monolithic IC. Three external capacitors and a +5 volt power supply are all that is required to measure accelerations up to ± 50 g. Device sensitivity is factory trimmed to 19 mV/g, resulting in a full-scale output swing of ±0.95 volts for a ±50 g applied acceleration. Its zero g output level is +1.8 volts. A TTL compatible self-test function can electrostatically deflect the sensor beam at any time to verify device functionality.

For convenience, the ADXL50 has an internal buffer amplifier with a full 0.25 V to 4.75 V output range. This may be used to set the zero-g level and change the output sensitivity by using external resistors. External capacitors may be added to the resistor network to provide 1 or 2 poles of filtering. No external active components are required to interface directly to most analog-to-digital converters (ADCs) or microcontrollers.

The ADXL50 uses a capacitive measurement method. The analog output voltage is directly proportional to acceleration, and is fully scaled, referenced and temperature compensated, resulting in high accuracy and linearity over a wide temperature range. Internal circuitry implements a forced-balance control loop that improves accuracy by compensating for any mechanical sensor variations.

The ADXL50 is powered from a standard +5 V supply and is robust for use in harsh industrial and automotive environments and will survive shocks of more than 2000 g unpowered.

The ADXL50 is available in a hermetic 10-pin TO-100 metal can, specified over the 0°C to +70°C commercial, and 40°C to +85°C industrial temperature ranges. Contact factory for availability of devices specified for operation over the 40°C to +105°C automotive temperature range.