Overview

The ZSSC3240 is a sensor signal conditioning IC (SSC) for highly accurate amplification, digitization, and sensor-specific correction of resistive sensor signals. The ZSSC3240 is suitable for bridge and half-bridge sensors, as well as external voltage-source ele­ment and single-element sensors (e.g., Pt100 and external temper­ature sensor diodes) powered by an on-chip current source. Digital compensation of the sensor offset, sensitivity, temperature drift, and non-linearity is accomplished via a 26-bit math core running a correction algorithm with calibration coefficients stored in a non-volatile, reprogrammable memory. The programmable, integrated sensor front-end allows optimally applying various sensors for a broad range of applications. The ZSSC3240 provides measurement value readouts and programming capabilities via an I2C, SPI, or one-wire interface (OWI). Three different operation modes allow optimal development of digital, digital-analog, and analog-output smart sensor modules including wake-up on request, continuous-on/fast‑response, and automatic/cyclic sensor measurement operations. Absolute and ratiometric voltage, current-loop, or interrupt analog outputs are supported by the ZSSC3240. The analog output options and digital interface options (for calibration and/or a digital application inter­face) can be combined.

  • Digital communication and calibration interfaces:
    • SPI up to 10MHz
    • I2C (Standard, Fast, and High-Speed Mode)
    • One-wire-interface (OWI), up to 100kBit/s
  • Accommodates nearly all resistive bridge sensor types (signal spans from 1mV/V up to 500mV/V)
  • Supports different sensor element configurations:
    • Resistive bridge or half-bridge
    • Resistive divider string
    • Voltage source
  • On-chip temperature sensor
  • External temperature sensing supported, e.g. sensor-bridge as temperature detector, external diode, etc.
  • Support for Pt100 
  • Programmable 16-bit digital-to-analog-converter and output:
    • (0V to 1V) or (0V to 5V) absolute voltage output
    • VDD-ratiometric voltage output
    • 4mA to 20mA current-loop output supported 
    • 0V to 10V absolute-voltage output supported
  • On-chip voltage regulators for sensor supply, and IC operation
  • Support for VDD regulation by external JFET
  • 24-bit analog-to-digital converter and 26 bits digital-signal-conditioning math core
  • Reprogrammable, nonvolatile memory (NVM)
  • Programmable measurement scheduler for continuous sensing applications, with optimized balance of 
    • Energy consumption
    • Output update rate
    • Sensor-signal-conditioning accuracy
    • Self-diagnostic coverage and system safety
  • On-chip diagnostics:
    • Sensor connection
    • Broken-chip-check / chipping-check
    • Memory integrity

Documentation

Title Type Date
PDF1.49 MB
Datasheet
PDF986 KB
Application Note
PDF381 KB
Manual - Development Tools
PDF526 KB
Manual - Software
PDF2.93 MB
Overview
PDF642 KB
Technical Brief
PDF800 KB
Technical Brief

Design & Development

Boards & Kits

Support

Videos & Training

IDT Sensor Signal Conditioner (SSC) Evaluation Kit Overview

A brief introduction and overview of IDT's sensor signal conditioner evaluation kits. Evaluation kits generally consist of three parts: a communication interface board,  a device board, and a sensor simulator board - all connected together. A sophisticated software GUI accompanies the kit, enabling an engineer to learn how to use the part rapidly, do quick prototyping, and practice calibrations.

Presented by David Grice, applications engineer at IDT. For more information about IDT's sensor signal conditioner products, visit https://www.idt.com/ssc