Renesas ZSSC3240CC3R

Overview

ZSSC3240CC3R from Renesas is a sensor signal conditioning IC (SSC) for resistive sensors, performing high-accuracy amplification, 24-bit ADC digitization, and digital correction of offset, sensitivity, temperature drift, and non-linearity via a 26-bit math core. It supports bridge/half-bridge, Pt100, and external diode sensors with on-chip current source biasing, and delivers calibrated outputs via I²C/SPI/OWI interfaces. Used in industrial pressure transducers requiring ±0.01% FSO accuracy and ratiometric voltage output.

For engineers reviewing the ZSSC3240CC3R datasheet, ZSSC3240CC3R pinout, ZSSC3240CC3R application, or ZSSC3240CC3R equivalent, this page provides verified technical context, real-world interface timing (SPI up to 10 MHz, I²C High-Speed Mode), analog output options (0–1 V, 0–5 V, 4–20 mA), diagnostic coverage (sensor connection, memory integrity, chipping check), and confirmed alternative part selection guidance.

Technical Context

The ZSSC3240CC3R integrates a programmable-gain amplifier (1.32–540 V/V, ±2.5% gain error), a 12–24-bit ADC (ENOB up to 18.1 bits), and a 13–16-bit DAC with <150 µs settling time. Its 26-bit math core executes sensor-specific correction algorithms using coefficients stored in reprogrammable NVM.

It supports three operational modes - wake-up-on-request, continuous/fast-response, and automatic cyclic measurement - with scheduler-controlled trade-offs among energy consumption (as low as 3.5 µA avg), update rate (up to 2.91 kHz), and self-diagnostic coverage. Analog outputs include absolute voltage (0–1 V / 0–5 V), VDD-ratiometric (2.5–97.5% VDD), and 4–20 mA current loop with FB feedback.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-QFN with wettable flanks (RoHS-compliant, JEDEC MS-012 variant). Exposed thermal pad (Pin 25) must be connected to VSS for thermal dissipation and EMC robustness.

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 ZSSC3240CC3R uniquely integrates sensor-specific correction math, reprogrammable NVM, multiple analog output topologies, and comprehensive on-chip diagnostics - enabling certified smart sensor modules without external computation or output circuitry.

Availability

ZSSC3240CC3R is available at Aetrix Electronics and suitable for industrial pressure transducers, medical blood pressure monitors, HVAC temperature sensors, and white goods load cells requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for ZSSC3240CC3R 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 sensor interface solutions for industrial, automotive, and IoT applications.

The ZSSC3240CC3R belongs to Renesas' Smart Sensor Signal Conditioning product line, designed specifically to replace discrete signal chains in high-accuracy resistive sensor systems with a single, programmable, and safety-aware IC.

FAQ

What sensor types does the ZSSC3240CC3R support?

The ZSSC3240CC3R supports resistive bridge and half-bridge sensors, Pt100 RTDs, external temperature diodes, and resistive divider strings. It accommodates sensor resistances from 0.5 kΩ to 60 kΩ and signal spans from 1 mV/V to 500 mV/V. The ZSSC3240CC3R uses its on-chip current source to bias external elements and its internal temperature sensor for compensation - all confirmed in the official Renesas datasheet Section 6.2.4 and Table 12.

Does the ZSSC3240CC3R support both digital and analog outputs simultaneously?

Yes, the ZSSC3240CC3R supports concurrent digital interface operation (I²C/SPI/OWI) and analog output (voltage or current loop). For example, it can deliver a 4–20 mA output while accepting calibration commands via I²C - confirmed by Figure 21 (current loop topology) and Section 6.5.4 (interrupt signaling with analog output active) in the datasheet. The AOUT/OWI1 pin functions as dual-purpose, and OWI2in enables separate communication during current-loop use.

What is the maximum sensor excitation voltage the ZSSC3240CC3R can provide?

The ZSSC3240CC3R provides an internally regulated VDDB supply of 1.68–1.80 V for ratiometric bridge excitation. When using external transistor regulation via the LDOctrl pin, the IC supports total supply voltages up to 48 V - enabling high-voltage sensor excitation while maintaining internal analog rail stability. This is specified in Table 3 (Recommended Operating Conditions) and Section 6.7 (External LDO) of the Renesas datasheet.

How does the ZSSC3240CC3R handle temperature compensation?

The ZSSC3240CC3R performs full digital temperature compensation using its on-chip temperature sensor and/or external sources (e.g., bridge-as-thermistor, TEXT-driven diode). Correction coefficients for offset, sensitivity, and non-linearity vs. temperature are stored in reprogrammable NVM and applied by the 26-bit math core. This capability is documented in Section 6.6.3 (Digital Sensor-Signal-Conditioning Mathematics) and Table 35 (24-bit SSC Coefficients format).

Is the ZSSC3240CC3R pin-compatible with earlier ZSSC32xx variants?

No - the ZSSC3240CC3R is not pin-compatible with prior ZSSC32xx family members such as ZSSC3230 or ZSSC3216. Pin assignments differ significantly (e.g., RESQ is Pin 7 on ZSSC3240CC3R but unused on ZSSC3230; LDOctrl appears only on ZSSC3240). The datasheet confirms unique pin mapping in Figure 1 and Table 1, and Renesas does not list any drop-in replacements in its ordering information or migration guides.