Programmable Low Power Gyroscope

ADIS16251

Rev. A

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FEATURES

Yaw rate gyroscope with digital range scaling

±20°/sec, ±40°/sec, and ±80°/sec settings

14-bit digital gyroscope sensor outputs

12-bit digital temperature sensor output

Calibrated sensitivity and bias

In-system, auto-zero for bias drift calibration

Digitally controlled sample rate

Digitally controlled frequency response

Dual alarm settings with configurable operation

Embedded integration for short-term angle estimates

Digitally activated self-test

Digitally activated low power mode

Interrupt-driven wake-up

SPI-compatible serial interface

49 Hz sensor bandwidth

Auxiliary 12-bit ADC input and 12-bit DAC output

Auxiliary digital input/output

Single-supply operation: 4.75 V to 5.25 V

2000 g powered shock survivability

APPLICATIONS

Instrumentation control

Platform control and stabilization

Motion control and analysis

Avionics instrumentation

Navigation

Image stabilization

Robotics

FUNCTIONAL BLOCK DIAGRAM

SCLK

DIN

DOUT

DIO1 DIO2

SPI

PORT

TEMPERATURE

SENSOR

SELF-TEST

POWER

MANAGEMENT

AUXILIARY

I/O

ALARM

DIGITAL

CONTROL

SIGNAL

CONDITIONING

AND

CONVERSION

CALIBRATION

AND

DIGITAL

PROCESSING

ADIS16251

VCC

FILT

RATE

COM

AUX

ADC

AUX

DAC VREF

GYROSCOPE

SENSOR

RST

CS

Figure 1.

GENERAL DESCRIPTION

The ADIS16251 is a complete angular rate, measurement sys-

tem, available in a single compact package enabled by Analog

Devices, Inc. iSensor™ integration. By enhancing Analog Devices

iMEMS® sensor technology with an embedded signal processing

solution, the ADIS16251 provides factory-calibrated and tunable

digital sensor data in a convenient format that can be accessed

using a simple SPI serial interface. The SPI interface provides

access to measurements for the gyroscope, temperature, power

supply, and one auxiliary analog input. Easy access to calibrated

digital sensor data provides developers with a system-ready

device, reducing development time, cost, and program risk.

The device range can be digitally selected from three different

settings: ±20°/sec, ±40°/sec, and ±80°/sec. Unique charac-

teristics of the end system are accommodated easily through

several built-in features, including a single-command auto-zero

recalibration function, as well as a configurable sample rate and

frequency response. Additional features can be used to further

reduce system complexity, including:

•

Configurable alarm function

•

Auxiliary 12-bit ADC and DAC

•

Two configurable digital I/O ports

•

Digital self-test function

System power dissipation can be optimized via the ADIS16251

power management features, including an interrupt-driven

wake-up. The ADIS16251 is available in an 11 mm × 11 mm ×

5.5 mm, laminate-based, land grid array (LGA) package with a

temperature range of −40°C to +85°C.