AD5173BRM2.5-RL7

Overview

The AD5173BRM2.5-RL7 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 utilizes an I²C-compatible interface and includes dedicated address pins (AD0, AD1) for multi-device decoding. Electrical characteristics include a nominal resistance tolerance of ±20% at 25°C, 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) setting using fuse link technology
• I²C serial interface with AD0 and AD1 address decode pins
• Low power consumption: 6 µA maximum supply current

Applications

• Systems calibration
• Electronics level setting
• Mechanical trimmers replacement in new designs
• Permanent factory PCB setting
• Transducer adjustment of pressure, temperature, position, chemical, and optical sensors

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the required tape and reel packaging configuration. Confirm that the OTP programming circuitry can provide the necessary 5.6 V to 5.8 V supply voltage capable of driving 100 mA during the one-time programming event. Ensure ESD precautions are observed due to the sensitivity of the CMOS inputs.

Selection Notes

Select this component when a dual-channel solution with permanent non-volatile settings is required without the cost of EEPROM. The AD5173 variant specifically offers additional address pins compared to the AD5172, facilitating multiple devices on a single bus. Verify that the 2.5 kΩ end-to-end resistance aligns with the target impedance requirements and that the 256-position resolution is sufficient for the application's precision needs.

Part Context

This part belongs to the AD5172/AD5173 family of 256-position, one-time programmable digital potentiometers. The BRM2.5 designation indicates the 2.5 kΩ resistance value and MSOP-10 package. The AD5173 distinguishes itself from the AD5172 by including programmable address bits (AD0 and AD1) for enhanced bus management in multi-device systems.

Replacement Considerations

The AD5172BRM2.5-RL7 is a compatible alternative within the same family but lacks the AD0 and AD1 address decode pins found on the AD5173. If multiple devices share the I²C bus, the AD5172 may require different addressing strategies or external logic.