ZSSC3240BI3R

Overview

The ZSSC3240BI3R is a sensor signal conditioning integrated circuit manufactured by Renesas Electronics. It provides amplification and 24-bit digitization for bridge and half-bridge resistive sensors, followed by 26-bit sensor-specific correction in a math core that handles auto-zero, span, and first- and second-order temperature compensation from coefficients stored in non-volatile memory. The device features a programmable measurement sequencer that multiplexes between bridge, temperature, or diagnostic measurements. Individual measurements are offset compensated and amplified with a gain factor of up to 540V/V to optimize the ADC input range. The conditioned output values are available via standard digital interfaces, as an absolute or ratiometric analog voltage, or a standard industrial current loop.

Feature Summary

• Integrates a 24-bit analog-to-digital converter with a 26-bit math core for advanced sensor-specific correction including auto-zero, span, and temperature compensation.
• Features a programmable measurement sequencer capable of multiplexing between bridge, temperature, and diagnostic measurements.
• Supports flexible output configurations including digital interfaces, absolute or ratiometric analog voltages, and standard industrial current loops.

Applications

• Signal conditioning for pressure sensors utilizing resistive bridge elements
• Sensor platforms requiring high-accuracy amplification and digitization of resistive signals
• Industrial sensing applications demanding linearized and temperature-compensated outputs

Procurement Notes

The ZSSC3240BI3R is classified as an End-of-Life product. Renesas Electronics has issued a discontinuance notification indicating that the manufacturer will cease production. Current availability is limited, and procurement should account for potential supply constraints associated with obsolete components.

Selection Notes

This component is designed for resistive bridge and half-bridge sensors. It offers high flexibility for sensor platform development with best-in-class performance metrics. Engineers should verify compatibility with existing calibration coefficient storage requirements and ensure the PQFN-24 package fits the target PCB layout constraints.

Part Context

The ZSSC3240 belongs to the ZSSC3240 series of sensor signal conditioners. It shares the same die size and pad layout as the ZSSC3241, which is backward compatible but includes additional AFE configuration options and optimized EMC behavior. The ZSSC3240KIT serves as the official evaluation board for this device.

Replacement Considerations

The ZSSC3241 is a pin-compatible enhancement with 99% backward compatibility. It retains the same QFN24-pin-out and die size while adding features like programmable DAC output clipping and separate AOUT post-scaling math.