AD5122ABRUZ10

Overview

The AD5122ABRUZ10 is a dual-channel, nonvolatile digital potentiometer featuring 128 adjustment positions and an I²C interface. It offers a nominal resistance of 10 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device supports single or dual supply operation (VDD: 2.3 V to 5.5 V; VLOGIC: 1.8 V to 5.5 V) and operates within an extended industrial temperature range of −40°C to +125°C. Key electrical characteristics include a 3 MHz bandwidth, ±6 mA wiper current capability for the 10 kΩ variant, and fast start-up time under 75 µs.

Feature Summary

• Dual-channel architecture with 128-position resolution and nonvolatile EEPROM storage.
• I²C-compatible serial interface supporting standard (100 kHz) and fast (400 kHz) modes.
• Linear gain setting mode via INDEP pin for precise resistor matching.
• Wide operating voltage range with independent logic supply support.

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 'A' against the manufacturer's ordering guide to confirm the linear taper and 10 kΩ resistance value. Confirm package availability in TSSOP-16 format as required by the design. Ensure the I²C address configuration matches the system requirements, utilizing ADDR0 and ADDR1 pins if multiple devices are present.

Selection Notes

Select this component for applications requiring dual-channel analog signal attenuation or gain control with memory retention. The 10 kΩ resistance option provides higher bandwidth (3 MHz) compared to the 100 kΩ variant. Ensure the logic supply voltage (VLOGIC) is compatible with the host controller's I/O levels, as it ranges from 1.8 V to VDD.

Part Context

This part belongs to the AD5122A/AD5142A family of dual-channel digital potentiometers. The 'A' suffix denotes the I²C interface variant, distinguishing it from the SPI-based AD5122. It shares the same physical footprint and pinout with the AD5142A, which offers 256 positions instead of 128.

Replacement Considerations

The AD5122BRUZ10 is a parameter-equivalent alternative but utilizes an SPI interface rather than I²C, requiring significant firmware and hardware changes. Direct functional replacements must maintain the I²C interface and dual-channel configuration.