This document describes a ±2.5g - 10g two-axis low-g micromachined accelerometer, which features signal conditioning, a 1-pole low pass filter, temperature compensation, and sensitivity selection. It has the characteristics of low cost, low power consumption, sleep mode, and high shock survivability, making it suitable for various applications.
The MMA6271QT is a micromachined, two‑axis capacitive accelerometer that includes on‑chip signal conditioning, a 1‑pole low‑pass filter, temperature compensation, and a selectable‑gain (g‑Select) feature for 2.5 g, 3.3 g, 6.7 g or 10 g sensitivities. It operates from 2.2 V to 3.6 V and can draw as little as 500 pA in active mode, with a sleep‑mode current of only 3 pA, making it suitable for battery‑powered handheld devices.
Typical applications include free‑fall detection in laptops, motion sensing for phones and PDAs, tilt‑compensated e‑compass navigation, gaming motion control, and vibration/shock sensing. The document also provides pin descriptions, PCB layout guidelines, mechanical dimensions, and handling precautions for reliable integration into consumer and automotive designs.
| Supply Voltage | 2.2 V – 3.6 V |
|---|---|
| Supply Current (active) | 500 pA typ. |
| Sleep Mode Current | 3 pA typ. |
| Package | 16‑lead QFN 6 mm × 6 mm × 1.45 mm |
| Operating Temperature Range | -40 °C to +125 °C (device) / 40 °C to +105 °C (specified) |
The device offers four selectable sensitivities—2.5 g, 3.3 g, 6.7 g, and 10 g—set via the g‑Select pins.
In sleep mode the accelerometer draws as little as 3 pA typical current.
The MMA6271QT operates from 2.2 V up to 3.6 V.