AD5173BRMZ2.5-RL7

Overview

The AD5173BRMZ2.5-RL7 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 voltage ranging from 2.7 V to 5.5 V. The device utilizes an I²C-compatible serial interface for control and includes dedicated address decode pins (AD0, AD1) for multi-device systems. With a nominal end-to-end resistance of 2.5 kΩ, it offers low power consumption with a maximum supply current of 6 µA and a wide operating temperature range from −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for nonvolatile storage
• I²C-compatible 2-wire serial interface with full read/write capability
• Programmable address pins (AD0, AD1) for multiple package decoding

Applications

• Systems calibration and electronics level setting
• 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 tape and reel packaging when sourcing components. Confirm that the 2.5 kΩ resistance variant matches the design requirements, as other values such as 10 kΩ and 100 kΩ are available within the same family. Ensure the application circuit supports the required OTP programming voltage if permanent settings are needed.

Selection Notes

Select this component over the AD5172 when multiple devices must be addressed on the same bus, as the AD5173 provides extra address decode pins. Verify that the 2.5 kΩ resistance value aligns with the impedance requirements of the target circuit. Consider the 5 µs typical settling time and 6 µA maximum supply current for power-sensitive applications.

Part Context

This part belongs to the AD5172/AD5173 family of 256-position digital potentiometers. While the AD5172 lacks address pins, the AD5173 variant adds AD0 and AD1 inputs to facilitate system expansion. Both models share identical electrical characteristics and OTP functionality, differing primarily in their addressing capabilities for complex PCB layouts.

Replacement Considerations

The AD5172BRMZ2.5-RL7 serves as a functional substitute if only a single device is used on the bus, though the AD0 and AD1 pins will remain unconnected. Other variants within the AD517x series may require verification of resistance values and pin compatibility.