Renesas Electronics ZSSC3241 Sensor Signal Conditioner ICs

Renesas Electronics ZSSC3241 Sensor Signal Conditioner ICs are optimized for highly accurate amplification, digitization, and sensor-specific correction of resistive sensor signals. The ZSSC3241 SSC offers best-in-class sensor-element adaptability and is designed for bridge/half-bridge sensors and external voltage-source element/single-element sensors powered by an on-chip current source.

The Renesas ZSSC3241 ICs utilize a 26-bit math core operating a correction algorithm with calibration coefficients stored in a non-volatile, reprogrammable memory. This algorithm allows for digital compensation of the sensor offset, sensitivity, temperature drift, and nonlinearity. A second, separate compensation for gain/offset and digital-output independent analog-output correction is supported for optimum adaptability of dual-domain (analog and digital) sensor solutions. The programmable, integrated sensor front-end enables optimally employing various sensors for various applications.

The ZSSC3241 supplies measurement value readouts and programming capabilities through an I²C, SPI, or one-wire interface (OWI). Three operation modes permit the optimal development of digital, digital-analog, and analog-output smart sensor modules. These include wake-up on request, continuous-on/fast-response, and automatic/cyclic sensor measurement operations. The ZSSC3241 supports absolute and ratiometric voltage, current-loop, or interrupt analog outputs. The analog output and digital interface options (for calibration and a digital application interface) can be combined.

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
- V_DD-ratiometric voltage output
- 4mA to 20mA current-loop output supported

On-chip voltage regulators for sensor supply and IC operation
Support for extra regulation by an external transistor, for example, JFET
Programmable 24-bit sensor-signal-conditioning (main) mathcore
Programmable 16-bit signal-conditioning (support) mathcore for dual-domain sensor-applications
Reprogrammable, nonvolatile memory (NVM)
Programmable measurement scheduler for continuous sensing applications, with an optimized balance of:
- Energy consumption
- Output update rate
- Self-diagnostic coverage and system safety
Programmable analog-output clipping
On-chip diagnostics:
- Sensor connection
- Broken-chip-check / chipping-check
- Memory integrity

Applications

Calibrated, continuously operating sensors with digital interface and/or analog output: (absolute or ratiometric) voltage or current loop output
Enables smart digital sensors for energy-efficient solutions
Pressure, flow, and level sensing

Industrial applications, e.g. process/factory automation
Consumer / white goods, e.g., HVAC, weight scales
Medical applications, e.g. blood pressure, continuous smart health monitors

Specifications

Supply voltage, V_DDof 2.7V to 5.5V; with external transistor, for example JFET of 5V to 48V
-40°C to +125°C operating temperature range

0.5kΩ to 60kΩ supported sensor elements
Available as die on wafers or 4mm² 24-QFN with wettable flanks, allowing visual inspection of QFN reflow quality

Renesas Electronics ZSSC3241 Sensor Signal Conditioner ICs

Features

Applications

Specifications

Basic Application Diagram

Block Diagram

Typical Application Examples

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