ZSSC3123AA6C

Overview

The ZSSC3123AA6C 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 of 100 uA. It features digital compensation for sensor offset, sensitivity, and temperature drift using internal calibration coefficients stored in non-volatile EEPROM. The IC supports I2C, Serial, and SPI interfaces and offers open-drain or push-pull outputs.

Feature Summary

• CMOS integrated circuit designed for accurate capacitance-to-digital conversion
• Digital compensation of sensor offset, sensitivity, and temperature drift via internal DSP
• Configurable for single and differential capacitive sensors up to 10pF input capacitance
• Built-in sleep mode reduces current consumption to less than 1 uA

Applications

• Humidity sensing applications
• Weight scales and load sensing
• Liquid-level gauges
• MEMS-based pressure sensors for hydraulic-control systems

Procurement Notes

Verify the specific suffix AA6C against official Renesas documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints and interface requirements 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 low power consumption are required for capacitive sensor interfaces. Consider the ZSSC3123 family for its digital compensation capabilities which eliminate the need for external trimming components. Evaluate the available packages, such as die or TSSOP, based on assembly constraints and density requirements.

Part Context

The ZSSC3123 series belongs to Renesas' capacitive sensor signal conditioners, expanding upon previous ZMDI designs. It integrates a CMOS process with digital signal processing for precise sensor correction. The series includes variants like ZSSC3122 and ZSSC3123, offering pin-to-pin compatibility and flexible output options for various industrial and consumer applications.

Replacement Considerations

The ZSSC3122 is noted as pin-to-pin compatible within the same family. Verify functional equivalence regarding interface protocols and compensation algorithms when substituting. Consult official datasheets for any differences in maximum capacitance or accuracy specifications between variants.