AD5142BRUZ100-RL7

Overview

The AD5142BRUZ100-RL7 is a dual-channel, 256-position nonvolatile digital potentiometer from Analog Devices. It features a 100 kΩ nominal resistance with ±8% tolerance and a 35 ppm/°C temperature coefficient. The device operates on a single supply of 2.3 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V, with an independent logic supply ranging from 1.8 V to 5.5 V. It utilizes an SPI-compatible interface for setting wiper positions and storing data in EEPROM. Key electrical parameters include a maximum continuous current of ±1.5 mA per terminal, a bandwidth of 0.43 MHz at 100 kΩ, and a fast start-up time under 75 µs.

Feature Summary

• Dual-channel architecture with 256 taps and nonvolatile EEPROM storage for power-on restoration.
• SPI-compatible serial interface allowing independent programming and readback of wiper registers.
• Linear gain setting mode via INDEP pin for accurate resistor matching between channels.
• Wide operating temperature range from −40°C to +125°C with low total harmonic distortion.

Applications

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

Procurement Notes

Verify the package type matches the required PCB footprint, as the AD5142 family includes both TSSOP-16 and LFCSP-16 options. Confirm the interface compatibility, as the 'B' suffix denotes SPI operation, whereas other variants may use I2C. Ensure the logic supply voltage (VLOGIC) aligns with the system's digital controller levels, as it is independent of the analog supply rail.

Selection Notes

Select this component when dual-channel adjustment with memory retention is required. The 100 kΩ resistance value suits applications needing higher impedance than the 10 kΩ variant. Consider the linear gain setting mode if precise matching between the two potentiometers is critical. Verify that the 0.43 MHz bandwidth meets the AC signal requirements, as higher frequencies may require the 10 kΩ version for increased bandwidth.

Part Context

This part belongs to the AD5122/AD5142 family of nonvolatile digital potentiometers. The AD5142 specifically provides 256 positions compared to the 128 positions of the AD5122. The 'R' indicates a 100 kΩ resistor value, and 'U' specifies the TSSOP-16 package. The '-RL7' suffix typically denotes reel packaging for surface-mount assembly.

Replacement Considerations

For direct functional replacement with the same interface and package, consider the AD5142BRUZ100 without the reel suffix. For different packages, the AD5142BCPZ100 offers the same specifications in an LFCSP-16 package. If I2C interface is acceptable, the AD5142ABRUZ100 serves as an alternative within the same family.