Renesas ZSSC3241 IC (SSC)

The ZSSC3241 is an enhanced sensor signal conditioning IC (SSC) for highly accurate amplification, digitization, and sensor-specific correction of resistive sensor signals. The ZSSC3241 provides best-in-class sensor-element adaptability, and it 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. A second, separate compensation for gain and 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 allows optimally applying various sensors for a broad range of applications.

The ZSSC3241 is part of our Gen 5 Sensor Signal Conditioner family with additional functions and features. It 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 ratio metric voltage, current-loop, or interrupt analog outputs are supported by the ZSSC3241. The analog output options and digital interface options (for calibration and/or a digital application inter¬face) can be combined.

Features

• Digital communication and calibration interfaces SPI, I2C, OWI
• Supports various sensor element configurations
• On-chip temperature sensor
• External temperature sensing supported
• Programmable 16-bit DAC with post-calibration feature
• (0V to 1V) or (0V to 5V) absolute voltage output
• VDD- ratiometric voltage output
• 4mA to 20mA current-loop output
• 0V to 10V absolute-voltage output
• Programmable measurement scheduler
• DAC Output Clipping
• Self-diagnostic coverage and system safety
• On-chip diagnostics

Benefits

• Accommodates nearly all resistive bridge sensor types (signal spans from 1mV/V up to 500mV/V)
• Integrated 26-bit calibration math digital signal processor (DSP)
• Fully corrected signal at digital output
• One-pass calibration minimizes calibration costs
• No external trimming, filter, or buffering components required
• Integrated reprogrammable non-volatile memory
• Excellent for high-performance sensing solutions
• Optimized for the highest accuracy

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

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