The ADXL212 is a high precision, low power, complete dual axis accelerometer with signal conditioned, duty cycle adjusted, PWM output.
The ADXL212 is a high‑precision, low‑power dual‑axis accelerometer in an 8‑lead LCC package. It provides PWM‑modulated digital outputs whose duty cycles are proportional to acceleration, allowing direct measurement by a microcontroller without an ADC. Bandwidth can be set from 0.5 Hz to 500 Hz with a single external capacitor, and the device operates from 3 V to 5.25 V.
Typical applications include automotive tilt alarms, vehicle dynamic control, electronic stability programs, navigation, platform stabilization, and motion detection. The datasheet includes pin descriptions, absolute maximum ratings, thermal resistance data, performance curves, and an ordering guide.
| Measurement Range | +2 g |
|---|---|
| Sensitivity (typical) | 12.5 %/g |
| Zero‑g Duty Cycle (typical) | 50 % |
| Noise Density (typical) | 500 pg/√Hz rms |
| Bandwidth (typical) | 500 Hz |
| Operating Voltage Range | 3.0 V – 5.25 V |
| Quiescent Supply Current | 0.7 mA – 1.1 mA |
| Turn‑On Time | 19 ms |
| Temperature Range (operating) | -40 °C – +85 °C |
| Shock Survival | 3500 g |
The ADXL212 operates from 3.0 V up to 5.25 V.
The zero‑g bias output is ratiometric to the supply voltage and is nominally 50 % at any supply voltage.
At 5 V the typical sensitivity is 12.5 % per g.
Yes, when both axes are level with the earth, the device can measure roll and pitch tilt using the acceleration vectors.