AD5172BRM2.5-RL7

Overview

The AD5172BRM2.5-RL7 is a dual-channel, 256-position digital potentiometer from Analog Devices featuring one-time programmable (OTP) memory. It utilizes fuse link technology to permanently retain resistance settings after a single programming event. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and communicates via an I²C-compatible serial interface. Key electrical parameters include a nominal end-to-end resistance of 2.5 kΩ with a tolerance of ±20% at 25°C, a temperature coefficient of 35 ppm/°C, and a maximum supply current of 6 µA. The unit is housed in a compact 10-lead MSOP package.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for permanent setting retention
• Temporary OTP overwrite capability allowing dynamic adjustments before power cycle
• I²C-compatible 2-wire serial interface for control

Applications

• Systems calibration requiring permanent factory settings
• Replacement for mechanical trimmers in new designs
• Transducer adjustment for pressure, temperature, and optical sensors
• RF amplifier biasing and gain control

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the tape and reel packaging configuration required for your assembly process. Confirm that the BRM variant matches the necessary thermal and performance specifications for your application environment. Ensure compatibility with the I²C bus voltage levels used in your system design.

Selection Notes

Select this component when non-volatile resistance settings are required without the complexity of EEPROM. The 2.5 kΩ resistance value suits applications needing lower impedance paths. Consider the temporary overwrite feature if field adjustments are needed before finalizing the permanent setting. Verify that the 10-lead MSOP package fits within the available PCB footprint constraints.

Part Context

This part belongs to the AD5172/AD5173 family of digital potentiometers. The AD5172 variant lacks the additional address decode pins found in the AD5173 model. The '2.5' in the part number indicates the 2.5 kΩ nominal resistance option, distinct from the 10 kΩ or 100 kΩ variants available in the same series.

Replacement Considerations

Public confirmed substitute part numbers: None identified.