Renesas ZSSC3241DL3W

Overview

ZSSC3241DL3W from Renesas is a sensor signal conditioning IC (SSC) for high-accuracy amplification, digitization, and correction of resistive sensor signals-including bridge, half-bridge, Pt100, and external diode sensors-featuring 24-bit ADC resolution, 16-bit DAC output, I²C/SPI/OWI interfaces, and operation from −40°C to +125°C in a 24-QFN package. It enables calibrated smart sensor modules with dual-domain (analog + digital) outputs for industrial pressure and medical blood pressure sensing.

For engineers reviewing the ZSSC3241DL3W datasheet, ZSSC3241DL3W pinout, ZSSC3241DL3W application, or ZSSC3241DL3W equivalent, key selection considerations include supported sensor configurations (ratiometric/absolute/current-mode), programmable measurement scheduling, on-chip diagnostics (sensor connection, memory integrity), analog output options (0–1 V, 0–5 V, 4–20 mA), and dual-math-core compensation for offset, sensitivity, temperature drift, and nonlinearity.

Technical Context

The ZSSC3241DL3W integrates two independent math cores: a 24-bit main core for full sensor-signal correction (offset, gain, temp drift, nonlinearity) using NVM-stored coefficients, and a 16-bit support core for dual-domain analog/digital output optimization. Its analog front-end includes a programmable-gain amplifier (1.32–540 V/V) and configurable sensor supply (ratiometric VDDB = 1.68–1.80 V or current-mode bias 5–500 µA).

Digital interface flexibility includes SPI (up to 10 MHz), I²C (Standard/Fast/High-Speed modes), and OWI (up to 100 kbit/s), with three operational modes: wake-up-on-request, continuous/fast-response, and automatic cyclic measurement. Analog outputs support absolute voltage (0–1 V / 0–5 V), ratiometric (2.5–97.5% VDD), or 4–20 mA current loop-with dedicated FB and LDOctrl pins enabling external JFET regulation for supply voltages up to 48 V.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-QFN with wettable flanks (exposed thermal pad connected to VSS). Pinout validated per Renesas ZSSC3241 datasheet Rev. Feb.2.24, Page 6–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1452ACM+T and AD7798BRUZ, the ZSSC3241DL3W uniquely integrates dual math cores, reprogrammable NVM, triple-interface support, and analog output drivers - enabling fully autonomous smart sensors without host MCU intervention for correction or output generation.

Availability

ZSSC3241DL3W is available at Aetrix Electronics and suitable for industrial pressure sensing, medical blood pressure monitoring, HVAC temperature control, and white goods weight scale applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ZSSC3241DL3W 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 products for automotive, industrial, infrastructure, and IoT applications.

The ZSSC3241DL3W belongs to Renesas' Sensor Signal Conditioner product line, designed specifically for high-accuracy, low-power, multi-protocol smart sensor modules in harsh industrial and certified medical environments.

FAQ

What sensor types does the ZSSC3241DL3W support?

The ZSSC3241DL3W supports resistive bridge and half-bridge sensors, Pt100 RTDs, external temperature diodes, and resistive divider strings. It accommodates sensor impedances from 0.5 kΩ to 60 kΩ and offers programmable current-mode bias (5–500 µA) or ratiometric VDDB supply (1.68–1.80 V). The ZSSC3241DL3W's flexible front-end eliminates need for external excitation circuitry across these topologies.

Does the ZSSC3241DL3W include nonvolatile memory for calibration coefficients?

Yes, the ZSSC3241DL3W includes reprogrammable nonvolatile memory (NVM) that stores sensor-specific correction coefficients for offset, sensitivity, temperature drift, and nonlinearity. These coefficients are executed by the 24-bit math core during real-time signal conditioning. The ZSSC3241DL3W allows field updates via I²C, SPI, or OWI - enabling post-manufacturing calibration and recalibration without hardware changes.

What analog output options are available on the ZSSC3241DL3W?

The ZSSC3241DL3W supports three analog output configurations: absolute voltage (0–1 V or 0–5 V), VDD-ratiometric voltage (2.5–97.5% of VDD), and 4–20 mA current loop. Output selection is programmable via register settings, and the AOUT/OWI1 pin provides short-circuit protection (≤12 mA). The ZSSC3241DL3W also includes dedicated FB and LDOctrl pins to support external transistor regulation for current-loop supplies up to 48 V.

Can the ZSSC3241DL3W operate with supply voltages above 5.5 V?

Yes, the ZSSC3241DL3W supports supply voltages up to 48 V using an external transistor (e.g., JFET) controlled by the LDOctrl pin. In this configuration, the internal LDOctrl output regulates the external transistor to generate a stable 4.6–5.5 V VDD target level. This capability allows the ZSSC3241DL3W to interface directly with industrial 24 V or 48 V current-loop systems without external DC-DC converters - a feature not available in standard 2.7–5.5 V-only signal conditioners.

What diagnostic functions does the ZSSC3241DL3W provide?

The ZSSC3241DL3W integrates on-chip diagnostics for sensor connection integrity, broken-chip detection (chipping-check), and NVM memory integrity verification. These diagnostics execute at power-on and can be triggered during operation via the CHECK_DIAG command. Diagnostic status is reported through the EOC pin and digital registers. The ZSSC3241DL3W's diagnostics reduce system-level validation effort and improve field reliability - especially critical in medical and industrial safety applications.