深圳市中立信电子科技有限公司

MMA9555LR1

加速计 Motion Sensing Platform Pedometer with auto wake and auto sleep for power savings

The MMA9555LR1 intelligent motion-sensing pedometer is an extension of the MMA955xL intelligent sensor platform. This device incorporates a 3-axis MEMS accelerometer, signal conditioning, data conversion, and a 32-bit microcontroller. This intelligent motion-sensing sensor provides sophisticated pedometer functionality, activity level and six directional orientation monitoring.

Features MMA9555LR1

• High resolution 3-axis accelerometer with 16-bit ADC (0.061 mg/LSB @ 2 g)

• Selectable g range (±2/4/8 g) and output data rates (488 Hz–3.8 Hz)

• One slave SPI or I2C interface operating at up to 2 Mbps for communication with the host processor

• 1.8 V supply voltage low power consumption

• 2 μA typical current at stop mode

• 117 μA for pedometer running at active and 92 μA at suspend

• 87 μA when six-direction detection mode

Typical Applications MMA9555LR1

This low-power, intelligent sensor is optimized for use in portable and mobile consumer products such as:

• Pedometers, wearable devices, smart watches, wristband

• Sleep monitoring

• Smart earphone

• Health monitoring