AD5171BRJ5-R2

Overview

The AD5171BRJ5-R2 is a 64-position, one-time programmable (OTP) digital potentiometer from Analog Devices. It utilizes fuse link technology to permanently retain the resistance setting 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, with a nominal tolerance of ±30% and a temperature coefficient of 35 ppm/°C in rheostat mode. The component is housed in a compact 8-lead SOT-23 package and supports an automotive operating temperature range from −40°C to +125°C.

Feature Summary

• One-time programmable (OTP) memory using fuse link technology for permanent resistance retention
• I²C-compatible 2-wire serial digital interface with full read/write capability
• 6-bit resolution providing 64 distinct wiper 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 signal conditioning circuits

Procurement Notes

Verify that the specific ordering suffix corresponds to the required resistance value and packaging format. Confirm OTP programming requirements, as the device requires a specific voltage window (4.75 V to 5.25 V) and current capability during the one-time programming phase. Ensure compatibility with the target system's I²C bus voltage levels.

Selection Notes

Select this component when a non-volatile, factory-programmed resistance setting is needed without the cost of EEPROM-based solutions. The 5 kΩ variant offers higher bandwidth compared to higher resistance versions. Consider the ±30% absolute tolerance if precise initial calibration is critical, or utilize external trimming if tighter accuracy is required before OTP activation.

Part Context

The AD5171 belongs to the AD517x family of digital potentiometers designed for applications where the resistance setting does not need to be changed after manufacturing. Unlike volatile digital potentiometers, the OTP feature ensures the setting persists through power cycles. The BRJ5 designation indicates a specific resistance value and package type within the broader AD5171 product line.

Replacement Considerations

Direct pin-for-pin replacements may include other parts from the AD517x family with different resistance values or packages. Verify that substitute components support the same I²C addressing scheme and OTP programming voltage requirements if permanent setting functionality is retained.