AD5171BRJZ100-R7

Overview

The AD5171BRJZ100-R7 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 100 kΩ, with a nominal tolerance of ±30%. Key electrical parameters include a maximum supply current of 10 μA, a typical adjustment settling time of 5 μs, and a temperature coefficient of 35 ppm/°C in rheostat mode. The component is housed in an 8-lead SOT-23 package and supports an automotive operating 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 qualified with operation from −40°C to +125°C

Applications

• System calibrations requiring fixed resistance values
• Replacement for mechanical trimmers and variable resistors
• Gain control and offset adjustments in electronic circuits
• Transducer circuit adjustments
• Programmable filters with bandwidth up to 1.5 MHz

Procurement Notes

Verify the specific ordering suffix R7 against the manufacturer's official documentation to confirm packaging details. Ensure that the system design accommodates the OTP programming requirements, specifically the need for a dedicated voltage source between 4.75 V and 5.25 V capable of supplying 100 mA during the fuse blowing process. Confirm that the application does not require post-programming reconfiguration, as the memory is non-volatile and immutable once activated.

Selection Notes

Select this component when a cost-effective, non-volatile digital potentiometer is required without the need for EEPROM-based reprogramming. The 100 kΩ variant is suitable for applications where higher impedance levels are acceptable. Designers must account for the ±30% absolute tolerance of the resistor network. For precise voltage divider applications, the ratiometric nature of the potentiometer mode reduces the impact of absolute tolerance variations.

Part Context

The AD5171 series serves as a low-cost alternative to Electrically Erasable Memory (EEMEM) digital potentiometers for applications where the resistance value is determined during manufacturing or initial setup and remains constant thereafter. The BRJZ designation indicates a specific resistance value and package type within the broader AD5171 family, which also includes variants with different resistance values and packages such as MSOP.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.