ZSSC3123AI7R

Overview

The ZSSC3123AI7R is a low-voltage capacitive sensor signal conditioner with digital output, manufactured by Renesas Electronics. It provides accurate capacitance-to-digital conversion and sensor-specific correction for capacitive sensors with maximum target input capacitance of 10pF. The device features sampling rates as fast as 0.7ms at 8-bit resolution, 1.6ms at 10-bit, 5.0ms at 12-bit, and 18.5ms at 14-bit. It achieves accuracy up to ±0.25% full-scale output over the temperature range of -20°C to 125°C at supply voltages of 3V or 5V (±10%). The component operates within a supply voltage range of 2.3V to 5.5V, consumes 100µA of operating current, and supports I2C, Serial, and SPI interfaces in a TSSOP-14 package.

Feature Summary

• Digital compensation of sensor offset, sensitivity, and temperature drift using internal algorithms and non-volatile EEPROM storage.
• Configurable for both single-ended and differential capacitive sensors with programmable capacitance span and offset.
• Internal temperature compensation reference eliminates the need for external components.
• Layout optimized for die-die bonding with sensors to enable low-cost, high-density chip-on-board assembly.

Applications

• Capacitive position sensing
• Capacitive level detection
• Capacitive touch interfaces

Procurement Notes

Verify the specific suffix 'AI7R' against the manufacturer's official datasheet to confirm the TSSOP-14 tape and reel packaging configuration. Ensure that the ordering quantity aligns with the standard reel size requirements specified in the procurement documentation. Cross-reference the RoHS compliance status and lead time estimates directly with authorized distributors prior to finalizing purchase orders.

Selection Notes

Select this component when designing systems requiring precise digital correction for capacitive sensors without external trimming. It is suitable for applications demanding high accuracy across wide temperature ranges and low power consumption. Consider the available interface options and the need for on-chip calibration data storage when evaluating alternative signal conditioners.

Part Context

This part belongs to the ZSSC3123 series of capacitive sensor signal conditioners. It is pin-to-pin compatible with other variants in the family, such as the ZSSC3122, allowing for flexible design integration. The series is designed to simplify the interface between capacitive sensors and microcontrollers by handling signal conditioning and digital communication internally.

Replacement Considerations

The ZSSC3122 is documented as a pin-to-pin compatible alternative within the same product family. Verify functional equivalence regarding interface protocols and compensation capabilities before substitution.