AD5170BRM2.5-RL7

Overview

The AD5170BRM2.5-RL7 is a 256-position, two-time programmable digital potentiometer from Analog Devices. It features an I²C-compatible interface and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device provides an end-to-end resistance of 2.5 kΩ with a temperature coefficient of 35 ppm/°C. It utilizes fuse link technology for nonvolatile memory retention, allowing unlimited adjustments prior to permanent programming. Key electrical parameters include a maximum supply current of 6 µA, a typical power-up settling time of 5 µs, and operation across a wide temperature range of −40°C to +125°C.

Feature Summary

• Two-Time Programmable (TTP) fuse link technology allows permanent setting with a second-chance overwrite capability.
• I²C-compatible 2-wire serial interface with full read/write access to the wiper register.
• Compact 10-lead MSOP package measuring 3 mm × 4.9 mm.
• Power-on preset to midscale with extra address decode pins (AD0, AD1) for multiple device decoding.

Applications

• Systems calibration and permanent factory PCB settings.
• Replacement for mechanical trimmers in new designs.
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors.
• RF amplifier biasing and gain control adjustments.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix indicates the 2.5 kΩ resistance variant and RL7 reel packaging. Check for ESD sensitivity precautions during handling. Ensure the ordering documentation matches the Rev. I datasheet specifications for electrical characteristics and pin configurations.

Selection Notes

Select this component when a solid-state replacement for mechanical potentiometers is required with high reliability. The 2.5 kΩ resistance value suits low-power applications. Consider the TTP feature if permanent factory programming is needed without external EEPROM. Verify that the I²C bus speed and voltage levels are compatible with the host controller. The wide operating temperature range supports industrial environments.

Part Context

The AD5170 belongs to the AD517x family of digital potentiometers. The BRM2.5 designation specifies the commercial temperature grade, MSOP package, and 2.5 kΩ nominal resistance. The -RL7 suffix denotes tape and reel packaging. This part integrates fuse-based memory to retain settings without power, distinguishing it from volatile digital potentiometers.

Replacement Considerations

Direct replacements within the same family include AD5170 variants with different resistance values (e.g., AD5170BRM10 for 10 kΩ). Cross-model substitutes like the AD5200 series offer similar functionality but may lack the two-time programmable fuse feature. Verify pin compatibility and interface protocols before substitution.