AD5142ABCPZ10-RL7

Overview

The AD5142ABCPZ10-RL7 is a dual-channel, nonvolatile digital potentiometer featuring 256-position resolution and an I2C-compatible interface. It offers a nominal resistance of 10 kΩ with a maximum tolerance of ±8% and a low temperature coefficient of 35 ppm/°C. The device supports single or dual supply operation (VDD: 2.3 V to 5.5 V; VSS: 0 V to −2.75 V) with an independent logic supply ranging from 1.8 V to 5.5 V. Key electrical parameters include a wiper current of ±6 mA, a bandwidth of 3 MHz, and a fast start-up time under 75 µs. It is housed in a compact 16-lead LFCSP package.

Feature Summary

• Dual-channel architecture with 256-tap resolution and nonvolatile EEPROM storage for power-down retention.
• I2C serial interface supporting standard (100 kHz) and fast (400 kHz) modes with programmable address decoding.
• Wide operating voltage range: 2.3 V to 5.5 V analog supply and 1.8 V to 5.5 V logic supply.
• Linear gain setting mode via INDEP pin for accurate resistor matching between channels.

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants
• Programmable power supplies

Procurement Notes

Verify the specific suffix 'RL7' corresponds to the reel packaging format required for assembly. Confirm the 'BCPZ' designation indicates the lead-free LFCSP package variant. Ensure the 'A' grade meets the required tolerance specifications for the application. Check for automotive qualification requirements if deploying in vehicle environments.

Selection Notes

Select this model over the AD5122A variant when 256 positions are necessary instead of 128. Choose the LFCSP package for space-constrained PCB layouts compared to the TSSOP option. Ensure the system design accommodates the 10 kΩ nominal resistance value and the ±6 mA wiper current limit. Verify that the I2C bus speed requirements align with the standard or fast mode capabilities.

Part Context

This component belongs to the AD5122A/AD5142A family of dual-channel digital potentiometers. It shares architectural similarities with the AD5142 (SPI interface) but utilizes an I2C interface. The part is designed for applications requiring precise, software-adjustable resistance values that must persist across power cycles.

Replacement Considerations

The AD5142ABRUZ10 is a functional equivalent in a 16-TSSOP package. The AD5142ABCPZ100-RL7 offers the same interface and resolution but with a 100 kΩ resistance value. Cross-referencing pinouts and electrical characteristics is recommended before substitution.