AD5170BRM2.5

Overview

The AD5170BRM2.5 is a single-channel, 256-position digital potentiometer manufactured by Analog Devices Inc. It features an end-to-end resistance of 2.5 kΩ and communicates via a 2-wire I²C-compatible serial interface. The device utilizes fuse link technology for two-time programmable (TTP) nonvolatile memory retention, allowing permanent setting of the wiper position. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a maximum supply current of 6 µA. The component is housed in a compact 10-lead MSOP package measuring 3 mm × 4.9 mm and supports an operating temperature range from −40°C to +125°C.

Feature Summary

• Two-time programmable (TTP) fuse link technology allows permanent resistance setting after unlimited volatile adjustments.
• I²C-compatible 2-wire serial interface with full read/write capability for the wiper register.
• Low power consumption with a maximum supply current of 6 µA at 5 V.
• Fast settling time of 1 µs typical during power-up transitions.

Applications

• Systems calibration
• Electronics level setting
• Replacement for mechanical trimmers in new designs
• Permanent factory PCB settings
• Transducer adjustment for pressure, temperature, and optical sensors

Procurement Notes

Verify the specific suffix '2.5' confirms the 2.5 kΩ nominal resistance value. Confirm the 'BRM' designation indicates the commercial temperature grade (-40°C to +85°C) or extended grade (-40°C to +125°C) as required by the application environment. Ensure the ordering code matches the exact package type and resistance tolerance specifications defined in the manufacturer's official documentation.

Selection Notes

Select this component when a solid-state replacement for mechanical potentiometers is required with high reliability and low temperature drift. The 2.5 kΩ resistance value suits applications requiring lower impedance levels. Consider the TTP feature if permanent factory programming is needed without external EEPROM. Verify that the I²C bus speed requirements do not exceed 400 kHz and that the supply voltage remains within the 2.7 V to 5.5 V operational range.

Part Context

The AD5170 series includes variants with different end-to-end resistances, specifically 2.5 kΩ, 10 kΩ, and 50 kΩ. The BRM2.5 variant specifically denotes the 2.5 kΩ resistance option within the 10-lead MSOP package family. All variants share identical pinouts, interface protocols, and nonvolatile memory technologies, differing primarily in their DC electrical characteristics such as bandwidth and absolute resistance values.

Replacement Considerations

Direct functional replacements within the same family include AD5170BRMZ10 (10 kΩ) and AD5170BRMZ50 (50 kΩ), provided the resistance value difference is acceptable for the circuit design. Other digital potentiometers may require significant schematic modifications due to differences in interface protocols, pin configurations, or memory types.