Renesas ZSSC3241DL5B

Overview

ZSSC3241DL5B from Renesas is a sensor signal conditioning IC (SSC) for resistive sensors, delivering 24-bit ADC resolution, 16-bit DAC output, and dual-domain (analog + digital) correction of offset, sensitivity, temperature drift, and non-linearity via 26-bit math core. It supports bridge/half-bridge, Pt100, and external diode sensors with on-chip current source, operating from 2.7V to 5.5V across –40°C to 125°C in industrial pressure, flow, and medical sensing systems.

For engineers reviewing the ZSSC3241DL5B datasheet, ZSSC3241DL5B pinout, ZSSC3241DL5B application, or ZSSC3241DL5B equivalent, key selection criteria include its programmable measurement scheduler, triple digital interface (I²C/SPI/OWI), ratiometric or absolute analog outputs (0–1V / 0–5V / 4–20mA), and support for external JFET regulation up to 48V.

Technical Context

The ZSSC3241DL5B integrates two independent math cores: a 24-bit primary core for full sensor correction (S/T outputs) and a 16-bit support core enabling simultaneous analog-output correction-critical for dual-domain smart sensor modules. Its analog front-end includes a PGA with 120 gain steps (1.32–540 V/V), configurable for ratiometric or current-mode sensor supply.

Digital interfaces operate concurrently: SPI at up to 10 MHz, I²C in High-Speed Mode, and OWI at 100 kbit/s-with AOUT/OWI1 serving as shared analog output or OWI data line. Diagnostics cover sensor connection, chipping check, memory integrity, and EOC interrupt signaling with hysteresis-configurable thresholds.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-QFN with wettable flanks (exposed thermal pad connected to VSS). Pinout validated per Renesas datasheet Figure 1 and Table 1 (Feb. 2024).

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 ZSSC3241DL5B uniquely integrates dual math cores, triple digital interfaces, and programmable high-voltage regulation-enabling fully autonomous, field-updatable smart sensors with zero host MCU dependency for correction or output generation.

Availability

ZSSC3241DL5B is available at Aetrix Electronics and suitable for industrial pressure sensing, medical blood pressure monitoring, smart flow metering, and white goods temperature control requiring stable component supply and long-term production continuity.

Supply support for ZSSC3241DL5B 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 SoC solutions for automotive, industrial, and IoT markets.

The ZSSC3241DL5B belongs to Renesas' Sensor Signal Conditioning IC product line, designed specifically for high-accuracy, low-power, self-contained smart sensor modules requiring autonomous correction and multi-interface flexibility.

FAQ

What is the maximum sensor resistance supported by the ZSSC3241DL5B?

The ZSSC3241DL5B supports resistive sensor elements from 0.5 kΩ to 60 kΩ, as confirmed in the Recommended Operating Conditions table (Page 8). This range covers standard Pt100 RTDs, NTC/PTC thermistors, and full/half-bridge configurations used in industrial and medical sensing applications. The on-chip current source and PGA architecture ensure stable biasing and signal amplification across this full span without external components.

Does the ZSSC3241DL5B support both ratiometric and absolute analog voltage outputs?

Yes, the ZSSC3241DL5B supports both output types via its programmable 16-bit DAC. Absolute outputs include 0–1 V and 0–5 V ranges, while ratiometric output delivers 2.5–97.5% of VDD. Configuration is set through the Aout_setup register (Section 6.5.3.2), and all modes maintain 13–16-bit resolution with ≤150 µs settling time. The ZSSC3241DL5B's dual-domain correction ensures accuracy is preserved regardless of output mode selected.

Can the ZSSC3241DL5B operate with supply voltages above 5.5 V?

Yes-the ZSSC3241DL5B supports extended supply operation from 5 V to 48 V using an external transistor controlled by the LDOctrl pin. When enabled, the internal LDOctrl circuit regulates VDD to a target level between 4.6 V and 5.5 V (Table 4), allowing safe integration into 24 V or 48 V industrial current-loop systems. This capability is explicitly documented in Section 6.7 and Table 38 of the datasheet.

How does the ZSSC3241DL5B handle temperature compensation for external sensors?

The ZSSC3241DL5B supports external temperature sensing via the TEXT pin, which provides a 150 Ω-protected current drive for diodes or RTDs. It also uses the bridge itself as a temperature detector in ratiometric configurations. Compensation is applied using the same 26-bit math core that corrects sensor output-enabling simultaneous, correlated correction of signal and temperature drift without host intervention. Calibration coefficients for both channels are stored separately in NVM.

What diagnostic functions are built into the ZSSC3241DL5B?

The ZSSC3241DL5B includes on-chip diagnostics for sensor connection integrity, broken-chip detection (chipping-check), and NVM memory integrity verification. These are accessible via the CHECK_DIAG command and reported in the diagnosticreg[15:0] register (Table 18). Diagnostics execute automatically during startup and can be triggered on-demand, supporting IEC 61508 functional safety requirements for industrial and medical applications without external supervision.