Renesas ZSSC3241DI5B

Overview

ZSSC3241DI5B from Renesas Electronics is a sensor signal conditioning IC (SSC) for high-accuracy amplification, digitization, and digital correction of resistive sensor signals. It supports bridge/half-bridge sensors, Pt100, and external diode temperature sensors with on-chip current source biasing; features 24-bit ADC, 16-bit DAC, dual math cores (26-bit main + 16-bit support), and non-volatile memory for calibration coefficients; used in industrial pressure/flow sensing modules requiring ratiometric voltage or 4–20 mA analog output.

For engineers reviewing the ZSSC3241DI5B datasheet, ZSSC3241DI5B pinout, ZSSC3241DI5B application, or ZSSC3241DI5B equivalent, this page delivers verified technical context, real-world interface configurations (I²C/SPI/OWI), analog output modes (0–1 V, 0–5 V, ratiometric, current loop), diagnostic capabilities, and validated alternative options for smart sensor design.

Technical Context

The ZSSC3241DI5B implements a dual-domain signal path: its 24-bit ADC digitizes sensor signals after programmable-gain amplification (gain range 1.32–540 V/V), while two independent math cores execute sensor-specific correction algorithms-26-bit core for primary offset/sensitivity/temperature/nonlinearity compensation, and 16-bit core for secondary analog-output domain correction. Calibration coefficients are stored in reprogrammable NVM.

It supports three operational modes: wake-up-on-request, continuous/fast-response, and automatic cyclic measurement with scheduler-controlled energy/output-rate/safety trade-offs. Analog outputs include absolute (0–1 V / 0–5 V), VDD-ratiometric (2.5–97.5% VDD), and 4–20 mA current loop-each configurable independently of digital interface use.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-QFN with wettable flanks (exposed thermal pad connected to VSS). Pinout validated per Renesas datasheet Rev. Feb. 2024, Page 6–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7798 and ICM-20948, the ZSSC3241DI5B uniquely integrates sensor-specific correction math, reprogrammable NVM, and multi-mode analog outputs-enabling complete smart sensor functionality without host processor dependency.

Availability

ZSSC3241DI5B is available at Aetrix Electronics and suitable for industrial pressure transmitters, medical blood pressure monitors, HVAC temperature sensors, and white goods flow meters requiring stable component supply across long product lifecycles.

Supply support for ZSSC3241DI5B 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 specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and IoT markets.

The ZSSC3241DI5B belongs to Renesas' Smart Sensor Signal Conditioning product line, engineered specifically to replace discrete analog signal chains in high-accuracy resistive sensor applications-from factory automation to portable medical devices.

FAQ

What sensor types does the ZSSC3241DI5B support?

The ZSSC3241DI5B supports resistive bridge and half-bridge sensors, Pt100 RTDs, external temperature diodes, and resistive divider strings. Its programmable front-end accommodates sensor impedances from 0.5 kΩ to 60 kΩ and signal spans from 1 mV/V to 500 mV/V-making it compatible with most industrial and medical resistive sensing elements without external circuitry.

How does the ZSSC3241DI5B handle temperature compensation?

The ZSSC3241DI5B performs digital temperature compensation using a 26-bit math core that applies stored calibration coefficients to correct offset, sensitivity, and nonlinearity drift over temperature. It leverages both an on-chip temperature sensor and optional external sensing (via TEXT pin or bridge-as-thermistor configuration) to achieve ±0.25°C accuracy for Pt100-based systems across −40°C to +125°C.

Can the ZSSC3241DI5B generate both analog and digital outputs simultaneously?

Yes-the ZSSC3241DI5B supports concurrent analog and digital outputs. It can deliver ratiometric voltage (2.5–97.5% VDD) or 4–20 mA current loop output while simultaneously providing corrected digital results via I²C, SPI, or OWI. The dual math cores enable independent correction paths for each domain, ensuring analog and digital outputs remain fully aligned.

What is the role of the LDOctrl pin on the ZSSC3241DI5B?

The LDOctrl pin on the ZSSC3241DI5B provides a control signal to drive an external transistor (e.g., JFET or BJT), enabling operation with supply voltages up to 48 V. This extends the device's utility beyond the native 2.7–5.5 V range into industrial current-loop applications where higher headroom is required for 4–20 mA transmitter designs.

Does the ZSSC3241DI5B include built-in diagnostics?

Yes-the ZSSC3241DI5B integrates hardware diagnostics including sensor open/short detection, broken-chip verification, and NVM integrity checking. These functions execute autonomously during normal operation and report status via dedicated registers, supporting functional safety requirements in industrial and medical applications without host CPU intervention.