ZSSC3123AI3B

Overview

The ZSSC3123AI3B is a capacitive sensor signal conditioner with digital output, manufactured by Renesas Electronics. It operates within a supply voltage range of 2.3 V to 5.5 V and draws a typical operating current of 100 uA. The device supports I2C, Serial, and SPI interfaces for data communication. It features differential input types and provides open drain or push-pull outputs capable of sourcing up to 20 mA. Designed for high-temperature environments, it functions reliably between -40°C and +125°C. The component is supplied as an unwaferized die in a gel pack, intended for SMD/SMT installation.

Feature Summary

• CMOS integrated circuit designed for accurate capacitance-to-digital conversion
• Supports piece-wise first and second order sensor compensation algorithms
• Includes internal temperature compensation reference eliminating external components
• Configurable for capacitive sensors with maximum target input capacitance of 10pF

Applications

• Capacitive sensor signal conditioning in IoT applications
• Chip-on-board assembly requiring low-cost, high-density integration
• Systems requiring digital compensation for sensor offset and sensitivity drift

Procurement Notes

Verify the specific suffix AI3B corresponds to the wafer/unwaferized die configuration and gel pack packaging. Confirm that the development kit ZSSC3123KITV1.0 is available for calibration procedures. Ensure compatibility with the host microcontroller's voltage levels and interface protocols before finalizing procurement orders.

Selection Notes

Select this component when a single-channel capacitive sensor interface with digital output is required. It is suitable for designs needing operation across a wide temperature range up to 125°C. Consider the die package format if direct bonding to sensors is planned. Verify power consumption requirements against the 100 uA typical operating current specification.

Part Context

This part belongs to the ZSSC3123 series of capacitive sensor signal conditioners. It complements Renesas' broader portfolio of sensor solutions and MCUs. The series is designed to simplify sensor integration by handling amplification, digitization, and correction internally.

Replacement Considerations

The ZSSC3122 is noted as pin-to-pin compatible with the ZSSC3123 series. Verify functional differences and application circuit requirements when considering substitution between these models.