A3G4250D sensor Datasheet

A3G4250D Datasheet, PDF, Equivalent


Part Number

A3G4250D

Description

MEMS motion sensor

Manufacture

STMicroelectronics

Total Page 30 Pages
Datasheet
Download A3G4250D Datasheet


A3G4250D
A3G4250D
MEMS motion sensor:
3-axis digital output gyroscope
Features
Wide supply voltage: 2.4 V to 3.6 V
±245 dps full scale
I2C/SPI digital output interface
16-bit rate value data output
8-bit temperature data output
Two digital output lines (interrupt and data
ready)
Integrated low and high-pass filters with user-
selectable bandwidth
Ultra-stable over temperature and time
Low-voltage-compatible IOs (1.8 V)
Embedded power-down and sleep mode
Embedded temperature sensor
Embedded FIFO
High shock survivability
Extended operating temperature range (-40 °C
to +85 °C)
ECOPACK® RoHS and “Green” compliant
AEC-Q100 qualification
Applications
In-dash car navigation
Telematics, e-Tolling
Motion control with MMI (man-machine
interface)
Appliances and robotics
LGA-16 (4x4x1.1 mm3)
Description
The A3G4250D is a low-power 3-axis angular rate
sensor able to provide unprecedented stability at
zero rate level and sensitivity over temperature
and time. It includes a sensing element and an IC
interface capable of providing the measured
angular rate to the external world through a
standard SPI digital interface. An I2C-compatible
interface is also available.
The sensing element is manufactured using a
dedicated micro-machining process developed by
STMicroelectronics to produce inertial sensors
and actuators on silicon wafers.
The IC interface is manufactured using a CMOS
process that allows a high level of integration to
design a dedicated circuit which is trimmed to
better match the sensing element characteristics.
The A3G4250D has a full scale of ±245 dps and
is capable of measuring rates with a user-
selectable bandwidth.
The A3G4250D is available in a plastic land grid
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)
A3G4250D
-40 to +85
A3G4250DTR
-40 to +85
Package
LGA-16 (4x4x1.1 mm3)
LGA-16 (4x4x1.1 mm3)
Packing
Tray
Tape and reel
February 2012
Doc 022768 Rev 3
1/44
www.st.com
44

A3G4250D
Contents
Contents
A3G4250D
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


Features A3G4250D MEMS motion sensor: 3-axis digi tal output gyroscope Features ■ Wide supply voltage: 2.4 V to 3.6 V ■ ±2 45 dps full scale ■ I2C/SPI digital o utput interface ■ 16-bit rate value d ata output ■ 8-bit temperature data o utput ■ Two digital output lines (int errupt and data ready) ■ Integrated l ow and high-pass filters with user- sel ectable bandwidth ■ Ultra-stable over temperature and time ■ Low-voltage-c ompatible IOs (1.8 V) ■ Embedded powe r-down and sleep mode ■ Embedded temp erature sensor ■ Embedded FIFO ■ Hi gh shock survivability ■ Extended ope rating temperature range (-40 °C to +8 5 °C) ■ ECOPACK® RoHS and “Green compliant ■ AEC-Q100 qualification Applications ■ In-dash car navigatio n ■ Telematics, e-Tolling ■ Motion control with MMI (man-machine interface ) ■ Appliances and robotics LGA-16 ( 4x4x1.1 mm3) Description The A3G4250D i s a low-power 3-axis angular rate senso r able to provide unprecedented stability at zero rate level and sensitivity over temperature and time. It incl.
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