MXD202

The MXD202 is a very low cost dual-axis acceleration sensor on a monolithic IC. With no moving parts, the device is extremely reliable and is manufactured on a submicron CMOS process enabling small geometries and small die size, resulting in low overall cost and high functionality. The MXD202 is primarily designed for applications requiring high performance and where overall system cost is a driving factor in component selection. The MXD202 measures acceleration with a full-scale range of up to ± 2.0g and produces a PWM digital signal output. Sensor is shipped with a duty cycle period of 10 milli- Seconds (100 Hz). Special order sensors are available with a duty cycle period of 2.5 milli-Seconds (400 Hz).Typical noise floor is .01% Duty CycleHz, allowing signals below 1.0 milli-g to be resolved. Frequency response extends to 40 Hz. The frequency response can be extended to 160 Hz with the implementation of a simple external circuit.

The MXD202 is a dc accelerometer with the capability to measure both ac acceleration, (typical of vibration) or dc accelerations, (such as inertial force or constant, gravity-induced accelerations).

The MXD202 offers digital output signals which duty cycles (ratio of pulse width to period) are proportional to the acceleration in each of the axes of sensitivity. The outputs can be measured directly with a microprocessor counter, eliminating the need for A/D converter or glue logic. The output duty cycle is programmable over a wide range of sensitivity. MXD202 offers a calibrated temperature sensor output with a positive temperature coefficient of 5.0 mV/. This device can be temperature compensated easily. The change in sensitivity over the temperature range 40 to 125 is predictable and follows the physical gas laws. The following equation can be used to predict the sensitivity at any given temperature:S_IN X (T_IN)^2.67 = S_FIN X (T_FIN)^2.67 (Temperature in °K) See Application Note (AN-00MX-001).

The MXD202 is available in a metal can (TO-100) or a surface mount (L_CC); both are hermetic and are specified over the temperature range -40 to 125.