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Preliminary Technical Data
FEATURES
Yaw rate gyro 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 rate/threshold limits 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
Programmable Low Power Gyroscope ADIS16251
FUNCTIONAL BLOCK DIAGRAM
AUX ADC AUX DAC VREF
ADIS16250
TEMPERATURE SENSOR GYROSCOPE SENSOR CS SPI PORT SCLK DIN SELF-TEST VCC DIGITAL CONTROL DOUT
RATE FILT
SIGNAL CONDITIONING AND CONVERSION
CALIBRATION AND DIGITAL PROCESSING
POWER MANAGEMENT
ALARM
AUXILIARY I/O
COM RST DIO0 DIO1
06070-001
Figure 1.
APPLICATIONS
Instrumentation control Platform control and stabilization Motion control and analysis Avionics instrumentation Navigation Image stabilization Robotics
GENERAL DESCRIPTION
The ADIS16251 is a complete, angular rate measurement system available in a single compact package enabled by Analog Devices 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 systemready 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 characteristics of the end system are accommodated easily through several built-in features, including a single-command
Rev. PrA
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auto-zero recalibration function, as well as 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.
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ADIS16251 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Recommended Layout ..................................................................... 7 Typical Performance Characteristics ............................................. 8 Theory of Operation ........................................................................ 9 Overview........................................................................................ 9 Relative Angle Estimate ............................................................... 9
Preliminary Technical Data
Temperature Sensor ......................................................................9 Auxiliary ADC FunctIon......................