ZSSC3123AA1B

Overview

The ZSSC3123AA1B is a capacitive sensor signal conditioner manufactured by Renesas Electronics. It provides 14-bit resolution and ±0.25% accuracy over a wide range of sensor capacitances and temperatures. The device operates on a supply voltage between 2.3 V and 5.5 V with an operating current as low as 60 uA. It features digital compensation for sensor offset, sensitivity, and temperature drift via an internal DSP. The IC supports I2C, SPI, PDM, or alarm outputs and includes an internal temperature compensation reference.

Feature Summary

• Digital compensation of sensor offset, sensitivity, and temperature drift using internal calibration coefficients stored in non-volatile EEPROM.
• Configurable for capacitive sensors up to 10pF with a sensitivity of 125aF/LSB, supporting both single-ended and differential configurations.
• Built-in sleep mode reduces current consumption to less than 1 uA at temperatures up to 85°C.
• Layout customized for die-die bonding with sensors to enable low-cost, high-density chip-on-board assembly.

Applications

• Capacitive position sensing
• Proximity detection systems
• Level measurement applications

Procurement Notes

Verify the specific suffix AA1B against official Renesas documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints and communication protocols before procurement. Confirm availability through authorized distributors as lead times may vary based on production schedules.

Selection Notes

Select this component when high accuracy and digital compensation are required for capacitive sensors. It is suitable for designs needing low power consumption and flexible output interfaces like I2C or SPI. Consider the ZSSC3123 series for applications requiring precise calibration without external trimming components.

Part Context

The ZSSC3123AA1B belongs to the ZSSC3123 family of capacitive sensor signal conditioners. This series integrates a CMOS circuit for accurate capacitance-to-digital conversion and sensor-specific correction. It is designed to replace traditional analog conditioning circuits by providing digital output and onboard calibration capabilities.

Replacement Considerations

The ZSSC3122 is pin-to-pin compatible with the ZSSC3123 series. Verify functional differences regarding maximum input capacitance and sensitivity settings when substituting. Consult the datasheet for specific electrical parameter comparisons between variants.