AD5172BRM10

Overview

The AD5172BRM10 is a dual-channel, 256-position digital potentiometer from Analog Devices. It features one-time programmable (OTP) memory for permanent resistance settings and operates on a single supply of 2.7 V to 5.5 V. The device utilizes an I²C-compatible interface for full read/write access to the wiper register. Key electrical parameters include a nominal resistor tolerance of ±20%, a temperature coefficient of 35 ppm/°C, and a maximum supply current of 6 µA. It supports end-to-end resistances of 2.5 kΩ, 10 kΩ, and 100 kΩ, with a typical power-up settling time of 5 µs.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for nonvolatile storage
• I²C-compatible serial interface with full wiper register read/write capability
• Power-on preset to midscale before OTP activation

Applications

• Systems calibration and electronics level setting
• Replacement for mechanical trimmers in new designs
• Permanent factory PCB settings and transducer adjustment
• RF amplifier biasing and gain control

Procurement Notes

Verify the specific suffix BRM10 against the manufacturer's ordering guide to confirm the exact resistance value (10 kΩ) and package type (MSOP). Confirm that the required voltage supply can provide the necessary 5.6 V to 5.8 V for OTP programming if permanent configuration is needed. Check for availability of evaluation boards such as EVAL-AD5172SDZ for initial testing.

Selection Notes

Select this component when a dual-channel solution with nonvolatile memory is required. Ensure the system design accommodates the 100 mA current spike during OTP programming. Compare with the AD5173 if additional address decode pins (AD0/AD1) are needed for multiple devices on the same bus. Verify that the 256-position resolution meets the application's precision requirements.

Part Context

The AD5172 belongs to the AD517x family of digital potentiometers, which also includes the single-channel AD5170 and the addressable dual-channel AD5173. These devices utilize thin-film technology for low temperature coefficients and offer a cost-effective alternative to EEPROM-based solutions for applications requiring fixed or semi-permanent resistance settings.

Replacement Considerations

The AD5142ABRUZ100 is listed as a substitute option by distributors. Verify pin compatibility and electrical specifications before replacement.