AD5142BCPZ10-RL7

Overview

The AD5142BCPZ10-RL7 is a dual-channel, 256-position nonvolatile digital potentiometer from Analog Devices. It features a 10 kΩ nominal resistance with ±8% tolerance and a low temperature coefficient of 35 ppm/°C. The device operates on a single supply voltage ranging from 2.3 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V, with an independent logic supply between 1.8 V and 5.5 V. It utilizes an SPI-compatible interface for programming and includes 256 taps per channel. Key electrical parameters include a maximum wiper current of ±6 mA, a bandwidth of 3 MHz at 10 kΩ, and a fast start-up time under 75 µs.

Feature Summary

• Dual-channel architecture with 256 positions and nonvolatile EEPROM storage
• SPI-compatible digital interface with read-back capability
• Linear gain setting mode via INDEP pin for independent string programming
• AEC-Q100 qualified for automotive applications

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 ordering suffix 'CPZ' corresponds to the LFCSP package and '-RL7' indicates reel packaging by consulting the manufacturer's official ordering guide. Confirm that the 'B' grade meets the required resistor tolerance specifications for the application. Ensure compatibility with the intended PCB footprint and thermal management requirements for the 16-lead LFCSP package.

Selection Notes

Select this component when a dual-channel solution with 256 resolution is required. The 10 kΩ resistance value is suitable for moderate impedance circuits. Consider the AEC-Q100 qualification if the design targets automotive environments. Verify that the SPI interface timing aligns with the host controller's capabilities and that the 3 mm × 3 mm package fits the board space constraints.

Part Context

This part belongs to the AD5122/AD5142 family of nonvolatile digital potentiometers. The AD5142 variant specifically provides 256 positions compared to the 128 positions in the AD5122. The 'BCPZ' designation identifies the 10 kΩ resistance option in the compact LFCSP package. The family supports both rheostat and potentiometer divider modes, offering flexibility in analog signal conditioning applications.

Replacement Considerations

The AD5142BRUZ100-RL7 serves as a direct replacement if a TSSOP package is acceptable instead of LFCSP. For I2C interface requirements, consider the AD5142A series. Ensure any substitute maintains the 256-position resolution and nonvolatile memory characteristics.