ZSSC3123AA2R

Overview

The ZSSC3123AA2R is a CMOS integrated capacitive sensor signal conditioner with digital output, part of the cLite family. It provides 14-bit resolution and 0.25% accuracy over a wide dynamic range of sensor capacitances and temperatures. The device operates on a supply voltage between 2.3 V and 5.5 V, consuming 100 uA during operation and less than 1 uA in sleep mode up to 85°C. It features differential input for single or differential sensors, supporting internal or external references. Communication interfaces include I2C, Serial, and SPI. The component is housed in a TSSOP-14 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Digital compensation for sensor offset, sensitivity, and temperature drift using internal algorithms and non-volatile EEPROM storage.
• Supports piece-wise first and second-order sensor compensation or third-order single-region compensation.
• Includes an internal temperature compensation reference eliminating the need for external components.
• Configurable for capacitive sensors with maximum target input capacitance of 10pF.

Applications

• Humidity sensing applications
• Weight scales and load sensing
• Hydraulic control system pressure sensors
• Liquid-level gauges

Procurement Notes

Verify the current lifecycle status before procurement, as sources indicate the product may be obsolete or nearing end-of-life. Confirm pin compatibility if replacing existing designs. Ensure the specific AA2R suffix matches the required package and tape-and-reel specifications for your assembly line. Cross-reference the manufacturer's official documentation for any recent changes to the RoHS compliance details or recommended operating conditions.

Selection Notes

Select this component when high accuracy (0.25%) and low power consumption are critical for battery-driven sensor systems. It is suitable for MEMS-based elements requiring digital correction of non-linearities. Consider the TSSOP-14 package constraints and the availability of development kits like the ZSSC3123KITV1.0 for calibration prototyping. Evaluate the interface requirements against available I2C or SPI lines in the host system.

Part Context

The ZSSC3123AA2R belongs to the Renesas ZSSC3123 series of capacitive sensor signal conditioners. It is designed to interface directly with capacitive sensors, converting analog capacitance changes into precise digital values. The series supports various sensor types including humidity, pressure, and level sensors, offering a solution for accurate signal conditioning without external trimming components.

Replacement Considerations

The ZSSC3122 is noted as pin-to-pin compatible. Verify functional equivalence regarding channel count and specific compensation capabilities before substitution. Check for any differences in interface protocols or power consumption characteristics between the two models.