原标题：TI TIDA-01471 PLC模拟输入IEPE震动传感器接口参考设计

　　TI公司的TIDA-01471是PLC模拟输入综合压电(IEPE)震动传感器接口参考设计,具有单路IEPE传感器模拟输入,24位转换效率,20kHz信号带宽,可编数据速率265 kSPS到 32 kSPS,可调增益-12dB到18dB,可编程激励电流2-20mA,±10-V AC输入,250-kΩ输入阻抗,工作温度–40℃ - 85℃,主要用在PLC,DCS模拟和混合输入模块,模拟信号调理/发送器,震动开关,数据采集和测量系统.本文介绍了参考设计TIDA-01471主要特性和指标,框图和测试建立图,电路图,材料清单和PCB设计图.

　　Industrial vibration sensing is a crucial process incondition monitoring, which is necessary for predictivemaintenance. An integrated electronic piezoelectric(IEPE) sensor is the most common vibration sensorused in the industrial environment. The TIDA-01471design is a full analog front end for the IEPE sensorinterface and demonstrates how to achieve flexiblehigh-resolution, high-speed conversion with low-powerand small-footprint implementation.

　　IEPE vibration sensor interface circuits are high-resolution, high-speed-specialized sensor interfacecircuits used in a range of industrial control products, including high-end measurement and dataacquisition (DAQ) systems, vibration switches, conditioners, and transmitters, as well as dedicated analoginput modules for programmable logic controllers (PLCs). The IEPE vibration sensor interface is anessential part of the condition monitoring platforms offered by top PLC and distributed control systems(DCSs) manufacturers. The range of existing IEPE sensor interface products extend from single channelto 12 or more channels for high-end systems. The bandwidth ranges from 1 kHZ up to 100 kHz with20 kHz as the most common bandwidth setting. The sampling frequency ranges from 25 kSPS up to100 kSPS, with a resolution of 16 bits to 24 bits.

　　参考设计TIDA-01471主要特性:

　　• Single-Channel IEPE Sensor Analog Input

　　• 24-Bit Conversion Resolution

　　• 20-kHz Signal Bandwidth

　　• Programmable Data Rate: 265 kSPS to 32 kSPS

　　• Adjustable Gain: –12 dB to 18 dB

　　• Programmable Excitation Current: 2 mA to 20 mA

　　• ±10-V AC Input, 250-kΩ Input Impedance

　　• –40℃ to 85℃ Operating Temperature Range

　　• Diagnostics: Wire-Break, Short-Circuit Detection,and Short-Circuit Protection

　　参考设计TIDA-01471应用:

　　• PLC, DCS Analog, and Mixed Input Module

　　• Analog Signal Conditioner/Transmitter

　　• Vibration Switch

　　• Data Acquisition and Measurement Systems

　　图1.参考设计TIDA-01471外形图

　　参考设计TIDA-01471主要指标:

　　图2.参考设计TIDA-01471框图

　　图3.参考设计TIDA-01471测试建立图

　　参考设计TIDA-01471材料清单: