AD5122ABCPZ10-RL7

Overview

The AD5122ABCPZ10-RL7 is a dual-channel, 128-position digital potentiometer from Analog Devices. It features nonvolatile memory to retain wiper settings across power cycles and communicates via an I²C interface. The device offers a nominal resistance of 10 kΩ with ±8% tolerance and supports single or dual supply operation ranging from 2.3 V to 5.5 V. Key electrical characteristics include a maximum wiper current of ±6 mA, a low temperature coefficient of 35 ppm/°C, and a bandwidth of 3 MHz at 10 kΩ. It operates within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• I²C compatible serial interface for control and status readback
• Nonvolatile EEPROM storage retains wiper position after power loss
• Linear gain setting mode allows independent programming of string resistors

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 package type against the datasheet, as the AD5122A family is available in both 16-lead LFCSP and TSSOP configurations. Confirm that the 'A' suffix denotes the I²C interface variant rather than SPI. Ensure the logic supply voltage requirements align with the system design, as the device supports a wide range from 1.8 V to VDD.

Selection Notes

Select this component when nonvolatile adjustment is required for dual-channel applications. The 10 kΩ resistance value provides a balance between noise performance and drive capability. Consider the linear gain setting mode if precise resistor matching between channels is necessary. Verify that the I²C bus speed (Standard or Fast mode) meets the system timing requirements.

Part Context

This part belongs to the AD5122A/AD5142A family of digital potentiometers. The AD5122A specifically refers to the 128-position variant with I²C communication, distinguishing it from the AD5122 (SPI interface) and AD5142A (256-position). The 'BCPZ' indicates the 16-lead LFCSP package with lead-free termination, while '10' specifies the 10 kΩ resistance value.

Replacement Considerations

For SPI interface requirements, consider the AD5122ABCPZ10-RL7. For higher resolution needs, the AD5142ABCPZ10-RL7 offers 256 positions. Single-channel alternatives include the AD5121 series.