ITG3200 Просмотр технического описания (PDF) - Unspecified

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ITG3200

The ITG-3200 triple-axis MEMS gyroscope

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ITG-3200 Product Specification

Document Number: PS-ITG-3200A-00-01.4

Revision: 1.4

Release Date: 03/30/2010

5 Functional Overview

5.1 Block Diagram

Optional

1

CLOCK

X Gyro

Y Gyro

Z Gyro

Clock

ADC

ADC

ADC

ITG-3200

Signal

Conditioning

Signal

Conditioning

Signal

Conditioning

Interrupt

Status

Register

Config

Register

Sensor

Register

FIFO

Interrupt

I2C Serial

Interface

12

INT

9

AD0

23

SCL

24 SDA

Temp

Sensor

ADC

Factory Cal

Charge

Pump

Bias & LDO

20

13

8

18

10

CPOUT

VDD VLOGIC GND REGOUT

5.2 Overview

The ITG-3200 consists of the following key blocks and functions:

Three-axis MEMS rate gyroscope sensors with individual 16-bit ADCs and signal conditioning

I2C serial communications interface

Clocking

Sensor Data Registers

Interrupts

Digital-Output Temperature Sensor

Bias and LDO

Charge Pump

5.3 Three-Axis MEMS Gyroscope with 16-bit ADCs and Signal Conditioning

The ITG-3200 consists of three independent vibratory MEMS gyroscopes, which detect rotational rate about the X

(roll), Y (pitch), and Z (yaw) axes. When the gyros are rotated about any of the sense axes, the Coriolis Effect causes a

deflection that is detected by a capacitive pickoff. The resulting signal is amplified, demodulated, and filtered to

produce a voltage that is proportional to the angular rate. This voltage is digitized using individual on-chip 16-bit

Analog-to-Digital Converters (ADCs) to sample each axis.

The full-scale range of the gyro sensors is preset to ±2000 degrees per second (°/s). The ADC output rate is

programmable up to a maximum of 8,000 samples per second down to 3.9 samples per second, and user-selectable low-

pass filters enable a wide range of cut-off frequencies.

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