AD5173BRM50-RL7

Overview

The AD5173BRM50-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 interface for control and includes extra address decode pins (AD0, AD1) for multi-device systems. Key electrical parameters include a maximum supply current of 6 µA, a temperature coefficient of 35 ppm/°C, and a typical power-on settling time of 5 µs.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for non-volatile storage
• I²C serial interface with dedicated AD0 and AD1 address pins
• Low power consumption with 6 µA maximum supply current

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

Procurement Notes

Verify the specific resistance value suffix in the part number, as the AD5173 series is available in 2.5 kΩ, 10 kΩ, and 100 kΩ variants. Confirm that the design supports the required OTP programming voltage conditions if permanent configuration is needed. Check for availability status as this component may be subject to lifecycle changes.

Selection Notes

Select the AD5173 over the AD5172 when multiple devices are used on the same bus, as it provides additional hardware address pins (AD0, AD1) for unique identification. Ensure the application requires dual channels; otherwise, the single-channel AD5172 may be sufficient. Verify that the 256-position resolution meets the system's precision requirements.

Part Context

This component belongs to the AD517x family of digital potentiometers, which utilize thin-film technology for low temperature coefficients. The AD5173 variant specifically distinguishes itself by offering two independent channels and enhanced addressing capabilities compared to the single-channel AD5172.

Replacement Considerations

The AD5172BRM50-RL7 is a compatible single-channel alternative within the same family. Substitution requires verifying that the second channel is not utilized in the target circuit and that the address pin configuration differences do not impact board layout.