A3G4250D STMicroelectronics

A3G4250D MEMS motion sensor: 3-axis digital output gyroscope Features Wide supply voltage: 2.4 V to 3.6 V 245 dps full scale 2 I C/SPI digital output interface 16-bit rate value data output 3 LGA-16 (4x4x1.1 mm ) 8-bit temperature data output Two digital output lines (interrupt and data ready) Integrated low and high-pass filters with user- Description selectable bandwidth The A3G4250D is a low-power 3-axis angular rate Ultra-stable over temperature and time sensor able to provide unprecedented stability at Low-voltage-compatible IOs (1.8 V) zero rate level and sensitivity over temperature and time. It includes a sensing element and an IC Embedded power-down and sleep mode interface capable of providing the measured Embedded temperature sensor angular rate to the external world through a 2 Embedded FIFO standard SPI digital interface. An I C-compatible interface is also available. High shock survivability The sensing element is manufactured using a Extended operating temperature range (-40 C dedicated micro-machining process developed by to +85 C) STMicroelectronics to produce inertial sensors ECOPACK RoHS and Green compliant and actuators on silicon wafers. AEC-Q100 qualification The IC interface is manufactured using a CMOS process that allows a high level of integration to Applications design a dedicated circuit which is trimmed to better match the sensing element characteristics. In-dash car navigation The A3G4250D has a full scale of 245 dps and Telematics, e-Tolling is capable of measuring rates with a user- Motion control with MMI (man-machine selectable bandwidth. interface) The A3G4250D is available in a plastic land grid Appliances and robotics array (LGA) package and can operate within a temperature range of -40 C to +85 C. Table 1. Device summary Order code Temperature range (C) Package Packing 3 A3G4250D -40 to +85 LGA-16 (4x4x1.1 mm)Tray 3 A3G4250DTR -40 to +85 LGA-16 (4x4x1.1 mm ) Tape and reel February 2012 Doc 022768 Rev 3 1/44 www.st.com 44Contents A3G4250D Contents 1 Block diagram and pin description . 6 1.1 Pin description 6 2 Mechanical and electrical characteristics 9 2.1 Mechanical characteristics . 9 2.2 Electrical characteristics 10 2.3 Temperature sensor characteristics . 10 2.4 Communication interface characteristics . 11 2.4.1 SPI - serial peripheral interface . 11 2.4.2 I2C - inter IC control interface 12 2.5 Absolute maximum ratings 13 2.6 Terminology . 14 2.6.1 Sensitivity 14 2.6.2 Zero-rate level 14 2.6.3 Stability over temperature and time 14 2.7 Soldering information 14 3 Main digital blocks . 15 3.1 Block diagram 15 3.2 FIFO . 15 3.2.1 Bypass mode . 15 3.2.2 FIFO mode . 16 3.2.3 Stream mode . 17 3.2.4 Retrieve data from FIFO 18 4 Application hints . 20 5 Digital interfaces . 22 5.1 I2C serial interface 22 5.1.1 I2C operation . 23 5.2 SPI bus interface . 24 5.2.1 SPI read . 25 5.2.2 SPI write 26 2/44 Doc 022768 Rev 3