ST L3G4IS User Manual
three-axis digital output gyroscope for gaming and OIS
LGA-16
(4x4x1 mm)
Features
■ Three selectable full-scales (250/500/2000
dps) for gaming applications
■ ± 65 dps full-scale for OIS applications
■ Independent I
■ Embedded temperature sensor
■ Integrated low- and high-pass filters with user-
selectable bandwidth
■ Wide supply voltage range: 2.4 V to 3.6 V
■ Low voltage-compatible IOs (1.8 V)
■ Power-down and sleep mode for smart power
saving
■ Embedded FIFO (first-in first-out buffer)
■ ECOPACK
Applications
2
C and SPI digital interfaces
®
RoHS and “Green” compliant
L3G4IS
MEMS motion sensor:
Preliminary data
scale can be activated by powering two separate
pins, the internal ASIC blocks automatically detect
and enable the selected device configuration.
The unique sensing element is manufactured
using a dedicated micro-machining process
developed by STMicroelectronics to produce
inertial sensors and actuators on silicon wafers.
The L3G4IS is available in a plastic land grid array
(LGA) package and can operate within a
temperature range of -30 °C to +85 °C.
■ Gaming and virtual reality input devices
■ Optical image stabilization
■ Motion control and gesture recognition
■ GPS navigation systems
Description
The L3G4IS is the first three-axis MEMS
gyroscope that enables both user interface and
image stabilization applications at the same time.
Thanks to two different independent reading
chains and digital interfaces, the L3G4IS delivers
previously unseen levels of flexibility to the end
user.
Each reading chain and the corresponding full-
Table 1. Device summary
Order code Temperature range (°C) Package Packing
L3G4IS -30 to +85 LGA-16 (4x4x1) Tray
L3G4ISTR -30 to +85 LGA-16 (4x4x1) Tape and reel
December 2011 Doc ID 022612 Rev 1 1/24
This is preliminar y information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
www.st.com
24
Contents L3G4IS
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Working mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 User interface mode specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Image stabilization (OIS mode) specifications . . . . . . . . . . . . . . . . . . . 13
5.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1 Power supply configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1.1 Configuration 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1.2 Configuration 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.3 Configuration 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.4 Configuration 4 (case use) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 Doc ID 022612 Rev 1
L3G4IS List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 8. Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 9. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 11. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 12. External components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 13. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Doc ID 022612 Rev 1 3/24
List of figures L3G4IS
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. L3G4IS electrical connections and external component values . . . . . . . . . . . . . . . . . . . . . 16
Figure 4. L3G4IS power supply configuration 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 5. L3G4IS power supply configuration 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6. L3G4IS power supply configuration 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 7. L3G4IS power supply configuration 4 (case use) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8. LGA-16: mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4/24 Doc ID 022612 Rev 1
L3G4IS Block diagram and pin description
AM10234V1
MEMS SENSOR
MUX
MUX
C -
converter
V
SC filter
ADC
Digital
filters
SPI
BW Selection
Actuation Interface
C -
converter
V
SC filter
ADC
Digital
filters
I2C
BW Selection
Actuation Interface
Full scale
Selection
FIFO
OIS Reading Chain
UI Reading Chain
AM10235v1
(TOP VIEW)
DIRECTIONS OF THE
DETECTABLE
ANGULAR RATES
X
Vdd_IO_SPI
SCL
SDA
GND
CS_OIS
SCL_OIS
SDI/SDO_OIS
Res
INT
DRDY
Res
Res
Cap
HAVdd
AVdd
Reg
1
8
12
5
49
13 16
+ Ω
Z
+Ω
X
BOTTOM
VIEW
+Ω
Y
1 Block diagram and pin description
Figure 1. Block diagram
1.1 Pin description
Figure 2. Pin connection
Doc ID 022612 Rev 1 5/24
Block diagram and pin description L3G4IS
Table 2. Pin description
Pin# Name Function
1 Vdd_IO_SPI Power supply for I/O pins of the PSPI interface
2SCLI
3SDAI
4 GND 0 V power supply
5 Reserved Leave unconnected
6 DRDY Data ready signal (open drain pad)
7 INT Programmable interrupt (open drain pad)
8 Reserved Leave unconnected
9 Reserved Leave unconnected
10 SDI/SDO_OIS Data-in, data-out line for SPI interface
11 SCL_OIS Clock line for SPI interface
12 CS_OIS SPI chip select line
13 Reg Capacitance connection pin for internal regulator
2
C serial clock (SCL)
2
C serial data (SDA)
14 Cap Capacitance connection pin for internal charge pump
15 HAVdd Power supply for OIS mode
16 AVdd Power supply for user interface mode
6/24 Doc ID 022612 Rev 1
L3G4IS Terminology
2 Terminology
2.1 Sensitivity
An angular rate gyroscope is a device that produces a positive-going digital output for
counter-clockwise rotation around the sensitive axis considered. Sensitivity describes the
gain of the sensor and can be determined by applying a defined angular velocity to it. This
value changes very little over temperature and time.
2.2 Zero-rate level
Zero-rate level describes the actual output signal if there is no angular rate present. The
zero-rate level of precise MEMS sensors is, to some extent, a result of stress to the sensor
and therefore the zero-rate level can slightly change after mounting the sensor onto a
printed circuit board or after exposing it to extensive mechanical stress. This value changes
very little over temperature and time.
Doc ID 022612 Rev 1 7/24
Working mode selection L3G4IS
3 Working mode selection
The L3G4IS can be used for user interface and image stabilization applications. Depending
on the power supply provided and dedicated internal bits configuration, the L3G4IS is able
to keep both reading chains active allowing the user to exploit the advantages of high
resolution on low full-scale and low current consumption on high full-scale at the same time
through SPI and I
Table 3. Operating mode
AVdd AVdd_OIS Operating mode I2C interface SPI interface
OFF OFF Gyro off Not available Not available
ON OFF UI
2
C digital interfaces.
Read/Write UI
registers
Not available
OFF ON OIS Not available
ON ON OIS/UI
Read/Write UI
registers
Read/Write OIS
registers
Read/Write OIS
registers
When either AVdd or HAVdd are removed they must be connected to GND for proper
working of the device.
8/24 Doc ID 022612 Rev 1
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