AD5171BRJZ50-R7

Overview

The AD5171BRJZ50-R7 is a 64-position, one-time programmable (OTP) digital potentiometer from Analog Devices. It utilizes fuse link technology to permanently retain resistance settings after programming. The device features an I2C-compatible digital interface and operates within a supply voltage range of 2.7 V to 5.5 V. It offers end-to-end resistance options including 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. This specific model provides 50 kΩ nominal resistance with ±30% tolerance. It supports full read/write access to the wiper register prior to OTP activation and includes an extra address pin for bus configuration.

Feature Summary

• One-time programmable (OTP) memory using fuse link technology for permanent setting retention
• I2C-compatible 2-wire serial digital interface with extra address pin (AD0)
• 6-bit resolution providing 64 distinct tap positions
• Low power consumption with maximum supply current of 10 μA

Applications

• System calibrations requiring fixed resistance values
• Replacement for mechanical trimmers and variable resistors
• Automotive electronics adjustments
• Gain control and offset adjustments in circuits
• Transducer circuit adjustments

Procurement Notes

Verify the ordering suffix R7 corresponds to the Reel packaging format as specified in the manufacturer's documentation. Confirm that the BRJZ variant indicates the SOT-23-8 package and automotive temperature grade. Ensure the system design accommodates the specific OTP voltage requirements during the programming phase.

Selection Notes

Select this component when a non-volatile resistance setting is required without the cost of EEPROM. The 50 kΩ value suits applications needing moderate impedance levels. Consider the 5 ppm/°C temperature coefficient in potentiometer mode for precision voltage divider applications. Verify that the I2C bus speed does not exceed 400 kHz and that the host controller can provide the necessary pull-up voltages.

Part Context

The AD5171 belongs to the family of 64-position OTP digital potentiometers. It serves as a low-cost alternative to electrically erasable memory solutions for applications where reprogramming is unnecessary. The device integrates fuse link technology to lock the wiper position permanently after a single programming event, ensuring data retention under normal operating conditions.

Replacement Considerations

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