AD5172BRM2.5

Overview

The AD5172BRM2.5 is a dual-channel, 256-position digital potentiometer featuring one-time programmable (OTP) memory via fuse link technology. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a maximum supply current of 6 µA. The device provides an end-to-end resistance of 2.5 kΩ and utilizes a standard I²C-compatible 2-wire serial interface for control. Key electrical characteristics include a typical settling time of 1 µs, a bandwidth of 4.8 MHz at midscale, and a low temperature coefficient of 35 ppm/°C. The component is housed in a compact 10-lead MSOP package measuring 3 mm × 4.9 mm.

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 serial interface with full read/write access to wiper registers

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the resistance value and packaging format. The base model designation indicates the functional family, but suffixes define critical parameters such as the 2.5 kΩ resistance option and tape-and-reel delivery method. Ensure compatibility with the required I²C address configuration and power supply requirements for OTP programming.

Selection Notes

Select this component when non-volatile resistance settings are required without the cost of EEPROM. The temporary overwrite feature allows for post-programming adjustments that reset upon power-up, functioning similarly to volatile memory with a preset. Ensure the design can provide the 5.6 V to 5.8 V VDD_OTP required for fuse blowing during the initial programming phase.

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, limiting its use in multi-device I²C configurations unless external addressing is employed. Both variants share identical electrical specifications and pinouts for the resistor terminals and serial interface.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.