ST L3G462A User Manual

± 625 dps full scale - 3-axis analog gyroscope

Features

■ ± 625 dps full scale

■ Wide supply voltage range 2.4 V to 3.6 V

■ Embedded power-down and sleep mode to

save power consumption and shorten turn-on time

■ Integrated temperature sensor

■ Embedded low pass filter

■ High shock survivability

■ Extended operating temperature range (-40 °C

to 85 °C)

■ ECOPACK

Applications

RoHS and “Green” compliant

L3G462A

MEMS motion sensor:

Preliminary data

LGA-16

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 L3G462A is available in a plastic land grid array (LGA) package and can operate within a temperature range from -40 °C to +85 °C.

(4x4x1.1 mm)

■ Gaming and virtual reality input devices

■ Motion control with MMI (man-machine

interface)

■ GPS navigation systems

■ Appliances and robotics

Description

The L3G462A is a low-power 3-axis angular rate sensor.

It includes a sensing element and an IC interface able to provide the measured angular rate to the external world through three analog outputs.

The sensing element is manufactured using a dedicated micromachining process developed by ST to produce inertial sensors and actuators on silicon wafers.

Table 1. Device summary

Order code Temperature range (°C) Package Packing

L3G462A -40 to +85 LGA-16 (4x4x1.1) Tray

L3G462ATR -40 to +85 LGA-16 (4x4x1.1) Tape and reel

March 2011 Doc ID 018584 Rev 1 1/11

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

www.st.com

Contents L3G462A

Contents

1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4.2 Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5 Sleep mode and power-down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.6 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2/11 Doc ID 018584 Rev 1

L3G462A Block diagram and pin description

1 Block diagram and pin description

1.1 Pin description

Figure 1. Pin connection

+Ω

OUT_Y

+Ω

OUT_P

GND

Res

MS2

+Ω

OUT_R

Res

(TOP VIEW) DIRECTIONS OF THE

DETECTABLE ANGULAR RATES

Table 2. Pin description

Pin# Name Function

1 NC Internally not connected

2 MS1 Mode selection pin 1

VCAP

GND

13 16

BOTTOM

VIEW

Vdd

Res

Vtemp

Vdd

OUT_P

OUT_R

NC MS1

Res

OUT_Y

AM09244V1

3 Res Reserved. Connect to GND

4 OUT_Y Yaw axis angular rate output

5 OUT_R Roll axis angular rate output

6 OUT_P Pitch axis angular rate output

7 Vdd Power supply

8 Res Reserved. Leave unconnected

9 Res Reserved. Leave unconnected

10 MS2 Mode selection pin 2

11 Res Reserved. Leave unconnected

12 GND 0 V supply voltage

13 GND 0 V supply voltage

14 CAP Charge pump capacitor connection pin

15 Vtemp Temperature sensor output

16 Vdd Power supply

Doc ID 018584 Rev 1 3/11

Mechanical and electrical specifications L3G462A

2 Mechanical and electrical specifications

2.1 Mechanical characteristics

Vdd = 3.0 V, T = 25 °C unless otherwise noted

Table 3. Mechanical characteristics

Symbol Parameter Test condition Min. Typ.

FS Measurement range ±625 dps

So Sensitivity 2 mV/dps

SoDr

Zrl Zero-rate level 1.5 V

OffDr

NL Non linearity

Sensitivity change vs. temperature

Zero-rate level change vs. temperature

(2)

(3)

Best fit straight line 0.5 % FS

(a)

(1)

Max. Unit

±0.017 %/°C

±0.04 dps/°C

dps/

Rn Rate noise density 0.017

BW Bandwidth 140 Hz

TSo

TOff

Temperature sensor sensitivity

Temperature sensor offset

-2 mV/°C

27 °C 640 mV

TonPD Turn-on time From PD to normal mode 150 ms

From sleep to normal

TonSl Turn-on time

mode (no external filter

10 ms

applied)

Top

1. Typical specifications are not guaranteed.

2. Min. and max. values have been estimated based on the measurements of the current gyros in production.

3. Guaranteed by design.

Operating temperature range

-40 +85 °C

a. The product is factory calibrated at 3.0 V. The operational power supply range is specified in Table 4.

4/11 Doc ID 018584 Rev 1

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