IDT ZSSC4175汽车热电偶调理器解决方案

IDT公司的ZSSC4175是用于有SENT输出的汽车传感器信号调理器,失调,灵敏度,温度漂移和非线性的数字补偿由16位RISC微控制器来完成.效准系数和配置数据存储在ZSSC4175D-01的非易失存储器,这在汽车应用中是可靠的.测量值则通过数字SENT接口来提供.而SENT接口能使热电偶调理数据经由最快通路发送,而补充数据则由串行数据信息(SDM)通路发送.ZSSC4175D-01和校准设备能进行到底数字通信,因此噪音灵敏度大大降低,而数字校准不需要外部设备或激光进行调整从而保持低的装配成本.工作温度-40℃到150℃,支持N型热电偶.精确度在1000℃热结时高达5K.SENT输出和SAE J2716 JAN2010 (SENTRev.3)以及APR2016 (SENT Rev.4)标准兼容.主要用在汽车排气系统.本文介绍了ZSSC4175主要特性,框图和基本电路图,应用主信号通路图和应用电路图,以及评估板ZSSC41xx SSC EB主要特性,电路图,材料清单和PCB设计图.
The ZSSC4175D-01 is a member of IDT’s family of CMOSintegrated circuits for highly accurate amplification and sensorspecificcorrection of two signals from thermocouple elements.Digital compensation of offset, sensitivity, temperature drift, andnonlinearity is accomplished via a 16-bit RISC microcontroller.Calibration coefficients and configuration data are stored in theZSSC4175D-01 nonvolatile memory (NVM), which is reliable inautomotive applications.
Measured values are provided via a digital SENT interface. TheSENT interface enables transmission of conditioned thermocoupledata via its Fast Channel as well as transmission of supplementarydata via its Serial Data Message (SDM) Channel (also referred toas the “slow” channel) using only one output pin. End-of-linecalibration is also supported through this output pin via a One-WireInterface (OWI). The ZSSC4175D-01 and the calibrationequipment communicate digitally, so the noise sensitivity is greatly reduced. Digital calibration helps keep assembly cost low as notrimming by external devices or lasers is needed.
The ZSSC4175D-01 is optimized for automotive environments byover-voltage and reverse-polarity protection circuitry, excellentelectromagnetic compatibility, and multiple diagnostic features...