Renesas ZSSC3240CI1C

Overview

ZSSC3240CI1C from Renesas is a sensor signal conditioning IC designed for high-accuracy amplification, digitization, and correction of resistive sensor signals-including bridge, half-bridge, Pt100, and external diode sensors. It integrates a 24-bit programmable math core, nonvolatile memory for calibration coefficients, and supports I²C, SPI, and one-wire digital interfaces. Its analog outputs include 0–1 V / 0–5 V absolute voltage, VDD-ratiometric voltage, and 4–20 mA current loop-enabling smart sensor modules in industrial pressure and medical blood pressure monitoring.

For engineers reviewing the ZSSC3240CI1C datasheet, ZSSC3240CI1C pinout, ZSSC3240CI1C application, or ZSSC3240CI1C equivalent, key selection criteria include supported sensor resistance range (0.5 kΩ to 60 kΩ), operating temperature (−40°C to +125°C), supply voltage (2.7 V to 5.5 V), analog output flexibility, and integrated diagnostics for sensor connection and memory integrity.

Technical Context

The ZSSC3240CI1C implements a dual-stage PGA with 120 gain steps (1.32–540 V/V) and a 12–24-bit ADC supporting up to 13 kHz single-conversion rate. Its 24-bit sensor-signal-conditioning math core executes digital compensation for offset, sensitivity, temperature drift, and nonlinearity using coefficients stored in reprogrammable NVM.

Digital interface support includes SPI (up to 10 MHz), I²C (Standard/Fast/High-Speed modes), and OWI (up to 100 kbit/s), all configurable for calibration and/or host communication. Analog output options-voltage (0–1 V, 0–5 V, ratiometric), current loop (4–20 mA), and interrupt signaling-are fully programmable and combinable with digital interfaces.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZSSC3240CI1C, the AD7798 demands external processing for correction and output generation, while the ICM-20948 serves entirely different sensing domains; neither offers the integrated, field-programmable, analog-output-ready signal chain of the ZSSC3240CI1C.

Availability

ZSSC3240CI1C 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-lifecycle support, and traceable sourcing.

Supply support for ZSSC3240CI1C 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, infrastructure, and IoT markets.

The ZSSC3240CI1C belongs to Renesas' Sensor Signal Conditioning IC product line, engineered specifically to replace discrete analog front-ends and MCU-based compensation in high-accuracy resistive sensor systems - targeting industrial process control, medical instrumentation, and smart appliance designs.

FAQ

What sensor types does the ZSSC3240CI1C support?

The ZSSC3240CI1C supports resistive bridge and half-bridge sensors, Pt100 RTDs, external temperature diodes, and single-element resistive sensors powered by its on-chip current source. It accommodates sensor resistances from 0.5 kΩ to 60 kΩ and signal spans from 1 mV/V to 500 mV/V. The ZSSC3240CI1C also enables ratiometric and current-mode excitation configurations for optimal noise immunity and accuracy across these sensor types.

Does the ZSSC3240CI1C include nonvolatile memory for calibration data?

Yes, the ZSSC3240CI1C integrates reprogrammable nonvolatile memory (NVM) that stores sensor-specific calibration coefficients for offset, sensitivity, temperature drift, and nonlinearity correction. These coefficients are applied by the 24-bit math core during operation, enabling field-updatable, high-accuracy measurements without requiring external memory or MCU intervention. The ZSSC3240CI1C supports multiple calibration sessions and retains data across power cycles.

Can the ZSSC3240CI1C generate both digital and analog outputs simultaneously?

Yes, the ZSSC3240CI1C supports concurrent digital interface communication (I²C, SPI, or OWI) and analog output delivery - including voltage (0–1 V, 0–5 V, ratiometric) and 4–20 mA current loop. Its architecture allows simultaneous OWI data exchange and analog output streaming, eliminating bus contention. This capability is confirmed in the ZSSC3240CI1C datasheet's typical application examples and OWI timing diagrams.

What diagnostic functions are built into the ZSSC3240CI1C?

The ZSSC3240CI1C includes on-chip diagnostics for 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 diagnostic register (diagnosticreg[15:0]). These features reduce system-level safety certification effort and support functional safety requirements in industrial and medical applications using the ZSSC3240CI1C.

What is the maximum supply voltage the ZSSC3240CI1C can handle with external regulation?

The ZSSC3240CI1C operates natively from 2.7 V to 5.5 V, but supports extended supply ranges up to 48 V using its LDOctrl pin to drive an external transistor (e.g., JFET). When configured with external regulation, the ZSSC3240CI1C maintains internal VDD regulation within 4.6 V to 5.5 V, ensuring stable analog and digital performance regardless of input rail fluctuations. This capability is explicitly defined in the ZSSC3240CI1C datasheet's Section 6.7 and Table 37.