ADI ADIS1625x低功耗陀螺仪方案

ADI公司的ADIS16250/ADIS16255是采用ADI iMEMS传感器技术的完整的角速率测量系统. ADIS1625x嵌入了信号处理解决方案,具有14位数字陀螺仪传感器输出和12位数字温度传感器输出,工作温度-40度到85度C,可广泛用在仪表控制,平台控制和稳定,运动控制和分析,航空仪表,导航,图像稳定以及机器人等.本文介绍了ADIS1625x低功耗陀螺仪的主要特性, 方框图以及ADIS1625x/PCB评估板电路图,PCB布局图和所用元件列表.

ADIS16250:  Programmable Low Power Gyroscope
The ADIS16250/ADIS16255 are complete angular rate measurement systems 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 ADIS16250/ADIS16255 provide factory-calibrated and tunable digital sensor data in a convenient format that can be accessed using a simple SPI serial interface. The ADIS16255 additionally provides an extended temperature calibration. 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: ±80°/sec, ±160°/sec, and ±320°/sec. Unique characteristics of the end system are accommodated easily through several built-in features, including a single-command auto-zero recalibration function, as well as configurable sample rate and frequency response. Additional features can be used to further reduce system complexity, including:

ADIS1625x主要特性:
Yaw rate gyroscope with digital range scaling ±80°/sec, ±160°/sec, and ±320°/sec settings
14-bit digital gyroscope sensor outputs
12-bit digital temperature sensor output
Calibrated sensitivity and bias +25°C
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
System power dissipation can be optimized via the ADIS16250/ ADIS16255 power management features, including an interrupt-driven wake-up. The ADIS16250/ADIS16255 are 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.



图1. ADIS1625x方框图

ADIS1625x主要应用:
Instrumentation control
Platform control and stabilization
Motion control and analysis
Avionics instrumentation
Navigation
Image Stabilization
Robotics

ADIS1625x/PCB评估板
The ADIS16250/PCB, ADIS16251/PCB, and ADIS16255/PCB are simple evaluation boards that provide convenient access to the ADIS16250, ADIS16251, ADIS16255 using a standard 2 mm, 2 × 6, connector interface. These connectors can be accessed using a variety of cable options, including standard 1 mm ribbon cables. The ADIS1625x/PCB is designed to be evaluated in an existing digital platform (such as MCU, DSP, FPGA, PLD) or as part of the ADISEVAL system. Four mounting holes (sized for 2-56 or 2 mm screws) have been provided to secure the board during evaluation.

评估板主要特性:
Base evaluation system for various iSensor products SPI Interface Cabling Evaluation software

评估板包括:
ADISUSBZ PCB
A-to-B USB Cable, 6 feet
Two 2mm stainless steel screws
12-pin, 2mm ribbon cable (ADIS16xxx/PCBZ)
iSensor® Documentation CD



图2.ADIS1625x/PCB评估板外形图



图3. ADIS1625x/PCB评估板电路图



图4. ADIS1625x/PCB评估板布局图



表1. ADIS1625x/PCB元件列表t