ZSSC3240BI5B

Overview

The ZSSC3240BI5B is a sensor signal conditioning integrated circuit designed for high-precision measurement of resistive sensors. It features a 24-bit analog-to-digital converter and an internal digital signal processor that performs 26-bit correction, including auto-zeroing, span adjustment, and first- and second-order temperature compensation using coefficients stored in non-volatile memory. The device supports bridge and half-bridge sensors, as well as Pt100 platinum resistance and diode-type thermometers via an on-chip current source. It operates within a voltage range of 2.7 V to 5.5 V and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a programmable measurement sequencer to multiplex between bridge, temperature, and diagnostic measurements.
• Provides amplification with a gain factor up to 540V/V to optimize the ADC input range before digitization.
• Includes an on-chip temperature sensor and supports external temperature sensing for comprehensive environmental monitoring.

Applications

• Pressure sensors utilizing resistive bridge elements
• Industrial process control instrumentation requiring high accuracy
• Medical devices needing precise temperature or pressure readings

Procurement Notes

Verify the specific suffix BI5B against official Renesas documentation to confirm package type and tape/reel specifications. Confirm availability status as some variants may be subject to discontinuation notices. Ensure compatibility with existing board layouts and software calibration tools provided by the manufacturer.

Selection Notes

Select this component when designing systems requiring direct interfacing with resistive sensors without external signal conditioning. Consider the ZSSC3241 if additional AFE configuration options or separate analog output post-scaling are required. Verify that the 24-bit resolution and internal DSP capabilities meet the system's linearity and drift requirements.

Part Context

The ZSSC3240BI5B belongs to the ZSSC3240 family of sensor signal conditioners from Renesas Electronics. This series is engineered to simplify sensor platform development by integrating amplification, digitization, and digital compensation into a single chip. The family targets applications demanding high flexibility and best-in-class performance in the sensing industry.

Replacement Considerations

The ZSSC3241 is noted as being 99% backward compatible with the ZSSC3240 series. It offers enhanced AFE configuration options and separate analog output post-scaling while maintaining the same die size and QFN24-pin-out layout. Verify pin compatibility and EEPROM differences before substitution.