AD5122BRUZ100

Overview

The AD5122BRUZ100 is a dual-channel, nonvolatile digital potentiometer featuring 128 adjustment positions and an SPI interface. It offers a nominal resistance of 100 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device operates on a single supply from 2.3 V to 5.5 V or a dual supply of ±2.25 V to ±2.75 V, with a logic supply range of 1.8 V to 5.5 V. Key electrical parameters include a maximum wiper current of ±1.5 mA for the 100 kΩ variant, a bandwidth of 0.43 MHz, and low power consumption of 0.7 µA at 5.5 V. It is housed in a 16-lead TSSOP package and supports an extended operating temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 128 nonvolatile tap positions per channel.
• SPI-compatible digital interface with independent logic supply (1.8 V to 5.5 V).
• Linear gain setting mode via INDEP pin for precise resistor matching.
• 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 suffix 'B' indicates the commercial grade and 'R' denotes reel packaging if ordering variants like AD5122BRUZ100-RL7. Confirm the 100 kΩ resistance option matches the design requirement, as 10 kΩ options are also available in the family. Ensure the TSSOP-16 package footprint aligns with the PCB layout specifications.

Selection Notes

Select this model for applications requiring dual-channel control with persistent settings after power loss. The 100 kΩ resistance value limits the maximum continuous wiper current to ±1.5 mA; ensure signal currents do not exceed this limit. For higher current handling, consider the 10 kΩ variant which supports ±6 mA. Verify that the system clock timing meets the SPI interface requirements for SYNC and SCLK.

Part Context

This component belongs to the AD5122/AD5142 family of dual-channel digital potentiometers. The AD5122 series provides 128 positions, while the AD5142 offers 256 positions. Both share similar electrical characteristics but differ in resolution. The BRUZ100 designation specifies the 100 kΩ resistance value and TSSOP package within the SPI-controlled subset of the family.

Replacement Considerations

The AD5122BRUZ100-RL7 is a reel-packaged equivalent of the tube-packed AD5122BRUZ100. For I2C interface compatibility, the AD5122ABRUZ100 serves as a functional alternative with identical electrical parameters but different communication protocol.