AD5171BRJZ50-R2

Overview

The AD5171BRJZ50-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, offering a cost-effective alternative to electrically erasable memory. The device features an I2C-compatible digital interface and operates within a supply voltage range of 2.7 V to 5.5 V. It provides a nominal end-to-end resistance of 50 kΩ with a tolerance of ±30%. The component supports both rheostat and potentiometer modes, ensuring monotonic operation across the automotive temperature range of −40°C to +125°C.

Feature Summary

• One-time programmable (OTP) fuse link technology for permanent set-and-forget resistance settings
• I2C-compatible 2-wire serial digital interface with full read/write wiper register access
• 6-bit resolution providing 64 distinct tap positions
• Automotive temperature rating spanning −40°C to +125°C

Applications

• System calibrations requiring fixed resistance values
• Mechanical trimmer and variable resistor replacements
• Gain control and offset adjustments in electronic circuits
• Transducer circuit adjustments
• Programmable filters with bandwidths up to 1.5 MHz

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 dedicated supply voltage between 4.75 V and 5.25 V during the one-time programming phase. Ensure the application design accounts for the irreversible nature of the fuse blowing process.

Selection Notes

Select this component when a non-volatile, factory-programmed resistance setting is needed without the complexity of external EEPROM. The 50 kΩ variant suits applications requiring moderate impedance levels. Consider the SOT-23-8 package constraints for PCB layout. Verify that the system can provide the necessary current and voltage for the OTP activation sequence if field programming is intended.

Part Context

This part belongs to the AD5171 series of 64-position digital potentiometers. The BRJZ suffix indicates a specific resistance tolerance and package type within the family. The device shares functional characteristics with other AD517x variants but differs in terminal resistance and physical packaging options.

Replacement Considerations

Direct substitutes include other AD5171 variants with different resistance values or packages, such as AD5171BRJZ100-R2. Cross-family replacements may require interface and pinout verification.