Renesas ZSSC3241DI3R

Overview

ZSSC3241DI3R from Renesas Electronics is a sensor signal conditioning IC (SSC) for high-accuracy amplification, digitization, and digital correction of resistive sensor signals-including bridge, half-bridge, Pt100, and external diode sensors. It features a 24-bit ADC, dual 26-bit/16-bit math cores, nonvolatile memory for calibration coefficients, and supports I²C, SPI, and one-wire interfaces. Used in industrial pressure transducers requiring ±0.05% full-scale accuracy with ratiometric analog output.

For engineers reviewing the ZSSC3241DI3R datasheet, ZSSC3241DI3R pinout, ZSSC3241DI3R application, or ZSSC3241DI3R equivalent, key selection criteria include supported sensor configurations (0.5–60 kΩ), programmable analog outputs (0–1 V / 0–5 V / 4–20 mA), operating temperature range (−40°C to +125°C), and dual-domain (analog + digital) compensation capability.

Technical Context

The ZSSC3241DI3R implements a two-stage programmable-gain amplifier (PGA) with 120 gain steps (1.32–540 V/V) and configurable input common-mode range (0.70–1.00 V). Its analog front-end supports ratiometric or current-mode sensor excitation, with internal VDDB regulation at 1.75 V ±0.07 V and on-chip temperature sensing.

Digital signal processing includes a primary 24-bit sensor-signal-conditioning math core executing offset, sensitivity, temperature drift, and nonlinearity correction using NVM-stored coefficients. A secondary 16-bit math core enables independent analog-output correction-enabling simultaneous calibrated digital readouts and precision analog outputs without cross-domain interference.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-pin QFN with wettable flanks (RoHS-compliant, lead-free, exposed thermal pad connected to VSS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sensor signal conditioning applications.

Compared with ICM-20948 and AD7798, the ZSSC3241DI3R uniquely integrates complete sensor-specific correction, dual-domain outputs, and autonomous operation-reducing system-level design effort, PCB area, and firmware development for resistive sensor applications.

Availability

ZSSC3241DI3R is available at Aetrix Electronics and suitable for industrial pressure transducers, medical blood pressure monitors, automotive fluid level sensors, and consumer weight scales requiring stable component supply across long product lifecycles.

Supply support for ZSSC3241DI3R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT markets-with emphasis on functional safety and energy efficiency.

The ZSSC3241DI3R belongs to Renesas' Smart Sensor Signal Conditioning product line, designed specifically for high-accuracy, low-power, and autonomous calibration of resistive sensors in harsh environments.

FAQ

What sensor types does the ZSSC3241DI3R support?

The ZSSC3241DI3R supports resistive bridge sensors (full/half-bridge), Pt100 RTDs, NTC/PTC thermistors, and external diode temperature sensors. It accepts sensor impedances from 0.5 kΩ to 60 kΩ and signal spans from 1 mV/V to 500 mV/V-enabling direct interfacing without external amplification or biasing circuitry. The ZSSC3241DI3R's programmable PGA and dual excitation modes (ratiometric or current-source) ensure compatibility across this wide range.

Does the ZSSC3241DI3R require an external microcontroller to operate?

No-the ZSSC3241DI3R operates autonomously after initial programming. Its embedded 26-bit math core executes full sensor correction (offset, sensitivity, temperature drift, nonlinearity) using coefficients stored in on-chip NVM. Digital interfaces (I²C/SPI/OWI) are used only for calibration setup or readout; continuous measurement, scheduling, and analog output generation occur independently. The ZSSC3241DI3R eliminates need for host MCU intervention during normal operation.

Can the ZSSC3241DI3R generate both analog and digital outputs simultaneously?

Yes-the ZSSC3241DI3R supports true dual-domain operation. Its primary 26-bit math core delivers corrected digital results (S and T values) via I²C/SPI/OWI, while a dedicated 16-bit support math core independently conditions the analog output path. This architecture prevents digital correction artifacts from affecting analog output fidelity-enabling concurrent, fully calibrated 16-bit digital readouts and 14-bit analog voltage/current outputs without performance compromise.

How does the ZSSC3241DI3R handle high-voltage industrial applications beyond 5.5 V?

The ZSSC3241DI3R uses its LDOctrl pin to drive an external JFET or MOSFET, enabling regulated VDD operation from 7 V to 48 V-ideal for 4–20 mA current-loop systems. The FB pin provides feedback to maintain precise VDD target levels (4.6–5.5 V), while internal regulators isolate analog and digital domains. This topology allows the ZSSC3241DI3R to retain full functionality-including PGA, ADC, and DAC operation-under high-voltage industrial conditions without external level-shifting components.

What diagnostics does the ZSSC3241DI3R provide for functional safety compliance?

The ZSSC3241DI3R includes on-chip diagnostics covering sensor connection integrity, broken-chip detection (chipping-check), and NVM memory integrity verification. Diagnostic status is accessible via the CHECK_DIAG command and reported in the diagnosticreg[15:0] register. These features support ISO 26262 ASIL-B and IEC 61508 SIL-2 system-level safety requirements-enabling automated fault detection without external supervision. The ZSSC3241DI3R's diagnostics are active during all operational modes, including idle and cyclic measurement.