Document
I3G4250D
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Features
Wide supply voltage: 2.4 V to 3.6 V Selectable full scale (245/500/2000 dps) 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
MEMS motion sensor: 3-axis digital output gyroscope
Datasheet - production data
Applications
Industrial applications
Navigation systems and telematics
Motion control with MMI (man-machine interface)
Appliances and robotics
Description
The I3G4250D 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 application through a standard SPI digital interface. An I2C compatible interface is also available.
The sensing element is manufactured using a dedicated micromachining 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 characteristics of the sensing element.
The I3G4250D has a selectable full scale (±245/±500/±2000 dps) and is capable of measuring rates with a user-selectable bandwidth.
The I3G4250D is available in a plastic land grid array (LGA) package and can operate within a temperature range of -40 °C to +85 °C.
Order code I3G4250D I3G4250DTR
Table 1. Device summary
Temperature range (°C)
Package
-40 to +85 -40 to +85
LGA-16 (4x4x1.1 mm3) LGA-16 (4x4x1.1 mm3)
Packing Tray
Tape and reel
April 2015
This is information on a product in full production.
DocID027628 Rev 2
1/43
www.st.com
Contents
Contents
I3G4250D
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Mechanical and electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Communication interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4.1 2.4.2
SPI - serial peripheral interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 I2C - inter IC control interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.6 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.6.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.6.2 Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.6.3 Stability over temperature and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.7 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 Main digital blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.2 FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.1 Bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.2.2 FIFO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.2.3 Stream mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2.4 Retrieving data from FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Digital interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.1 I2C serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.1 I2C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..