Renesas ZSSC3240CI2B

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 mathcore
• Reprogrammable, nonvolatile memory (NVM)
• Programmable measurement scheduler for continuous sensing applications, with an 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