Features
- 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
Description
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.
Parameters
| Attributes | Value |
|---|---|
| Function | Resistive SSC |
| Automotive Qual. | No |
| Supply Voltage (V) | - |
| Input Type | Single-bridge |
| Interface | I2C, SPI, Alarm, Ratiometric Voltage, Absolute Voltage, Current Loop, OWI |
| Adj. Analog Gain | - |
| Resolution (bits) | 24 |
| Sample Rate Max (KHz) | 2.91 |
| Temp. Range (°C) | -40 to 85°C, -40 to 125°C |
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