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[原创] IDT ZSSC4175汽车热电偶调理器解决方案

关键词:汽车电子 传感器 热电偶 ZSSC4175

时间:2019-07-29 11:03:56       来源:中电网

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.

ZSSC4175主要特性:

 Two differential thermocouple element inputs and an on-chiptemperature sensor, available for cold-junction compensationand temperature output
 Operating temperature range: -40℃ to 150℃
 Accuracy: up to 5K at 1000℃ hot junction
 Supports N-type thermocouples
 NVM memory for configuration, calibration data, andconfigurable measurement and conditioning functionality
 SENT output compliant to SAE J2716 JAN2010 (SENTRev.3) and APR2016 (SENT Rev.4) standard (refer tosection 7.6 for details)
 Supports output of one or more thermocouple signals andproduct identification via a single SENT interface connection
 End-of-line calibration process minimizes production costs
 No external trimming or components required
 Qualified according to AEC-Q100 Grade 0
 Enhanced diagnostic features for sensor module

ZSSC4175典型应用:

 Exhaust Systems

图1. ZSSC4175D框图

图2. ZSSC4175D-01基本电路图

图3. ZSSC4175D-01应用主信号通路图

图4. ZSSC4175D带SENT输出温度传感器应用案例电路图

评估板ZSSC41xx SSC EB

The ZSSC41xx SSC Evaluation Board (ZSSC41xx SSC EB) is the main board in the modular ZSSC41xx SSC Evaluation Kits. These kits aredesigned for sensor module evaluation, laboratory setup, and module calibration development for the ZSSC41xx Sensor Signal ConditionerICs (SSC), including the ZSSC4151, ZSSC4161, ZSSC4162, ZSSC4165, ZSSC4169 and ZSSC4175 (i.e., the device under test). Unlessotherwise noted, all references to the ZSSC41xx apply to these products.

Refer to the product-specific kit user manuals for the specific contents, hardware setup details, software setup, basic operation, and order codesfor the kits. Refer to the product-specific software manuals for full instructions for using the software for communication, calibration, configuration,and evaluation of the device under test (DUT). These manuals and the product-specific software are available for download on the IDT webpages for the specific products (see section 5).

The ZSSC41xx SSC Evaluation Kits contain the SSC Communication Board (SSC-CB), the ZSSC41xx SSC Evaluation Board, and the SensorReplacement Board (SSC-SRB). These boards can be connected in the following configurations:

 The kit can be set up using the Sensor Replacement Board in place of a real sensor only for demonstration purposes as illustrated inFigure 1 (see details in section 2.1).

 The user’s sensor can be connected on the KL1/KL2/KL3 screw terminals (see Figure 2) on the ZSSC41xx SSC Evaluation Board insteadof using the Sensor Replacement Board.

 The “Sensor 1” or “Sensor 2” headers can be used to connect through the Evaluation Board to a complete user’s module (including theuser’s sensor, ZSSC41xx DUT, and external circuit); in this case, do not use the 24-QFN socket or Sensor Replacement Board.

Note: Sensor 2 is not applicable to the ZSSC4151.
Note: The SSC Communication Board (SSC-CB) must be version 4.1 with the current firmware version (see section 5) to function properly withthe ZSSC41xx SSC Evaluation Board.

Note: On delivery, the ZSSC41xx SSC Evaluation Board has a “dummy” IC in the socket that must be replaced with an actual ZSSC41xx DUT.
Refer to Figure 1 for the location of pin 1 for proper IC orientation.

图5.评估板ZSSC41xx SSC EB外形图

图6.评估板ZSSC41xx SSC EB概述图

图7.评估板ZSSC41xx SSC EB电路图
评估板ZSSC41xx SSC EB材料清单:



图8.评估板ZSSC41xx SSC EB PCB设计图:丝印

图9.评估板ZSSC41xx SSC EB PCB设计图:顶层

图10.评估板ZSSC41xx SSC EB PCB设计图:底层
详情请见:
https://www.idt.com/document/dst/zssc4175d-01-datasheet
https://www.idt.com/document/man/zssc41xx-ssc-evaluation-board-reference-guide
IDT_ZSSC4175D-01-Datasheet_DST_20190607.pdf
IDT_ZSSC41xx-Evaluation-Bd-Ref-Guide_MAN_20190513.pdf

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