Description:

The SC7A20H is a high-precision digital three-axis accelerometer chip featuring richer built-in functions, lower power consumption, smaller size, and more accurate measurement. The chip communicates with the MCU via an I²C/SPI interface, and acceleration measurement data can be acquired through interrupts or polling. The INT1 and INT2 interrupt pins provide a variety of internally auto-detected interrupt signals, adapting to various motion detection scenarios. Interrupt sources include 6D/4D orientation detection interrupt signals, free-fall detection interrupt signals, sleep and wake-up detection interrupt signals, and single-click and double-click detection interrupt signals. The chip incorporates a high-precision calibration module that accurately compensates for the sensor's offset error and gain error. Four adjustable full-scale measurement ranges of ±2G, ±4G, ±8G, and ±16G enable flexible measurement of external acceleration, with output data rates selectable between 1.56 Hz and 4.27 kHz. The chip's built-in self-test function allows customers to verify system functionality during system testing, eliminating the need for complex turntable testing.

Key Features:

Wide voltage range: 1.71V–3.6V

1.8V-compatible digital I/O

Power supply current as low as 2µA@1.8V@1.56Hz in low-power mode

±2G/±4G/±8G/±16G dynamic full-scale range

12-bit data output

I²C/SPI digital output interface

6D/4D orientation detection

Free-fall detection

Single-click/multi-click detection and motion detection

Programmable interrupt generation circuit

Embedded self-test function

Embedded FIFO

10000g high-G shock resistance

Applications:

Mobile phones and tablets

Indoor navigation

Image rotation

Motion-activated user interface

Gaming