AD5173BRM2.5

Overview

The AD5173BRM2.5 is a dual-channel, 256-position digital potentiometer featuring one-time programmable (OTP) memory retention via fuse link technology. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes an I²C-compatible serial interface for control. The device provides end-to-end resistance options of 2.5 kΩ, 10 kΩ, or 100 kΩ, with a low temperature coefficient of 35 ppm/°C. Key electrical parameters include a maximum supply current of 6 µA, a typical power-on settling time of 5 µs, and an operating temperature range from −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) setting using internal fuse links
• Temporary OTP overwrite capability allows dynamic adjustments before finalization
• I²C-compatible 2-wire serial interface with additional address decode pins (AD0, AD1)
• Compact 10-lead MSOP package measuring 3 mm × 4.9 mm

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 circuits
• Gain control and offset adjustment in electronic systems

Procurement Notes

Verify the specific resistance value suffix (e.g., 2.5, 10, 100) as the base model number covers multiple variants. Confirm the package type is MSOP-10. Check for RoHS compliance status as manufacturing statuses may vary by production lot. Ensure the ordering suffix matches the required tape and reel configuration if applicable.

Selection Notes

Select the AD5173 over the AD5172 when multiple devices are used on the same bus, as the AD5173 includes dedicated AD0 and AD1 pins for hardware address decoding. Choose the 2.5 kΩ variant for lower noise density applications compared to higher resistance options. Ensure the design supports the 5.6 V to 5.8 V VDD_OTP requirement for fuse programming, distinct from the standard 2.7 V to 5.5 V operating range.

Part Context

The AD5173 belongs to the AD517x family of digital potentiometers manufactured by Analog Devices. This series replaces traditional mechanical variable resistors with solid-state alternatives offering enhanced reliability and resolution. The AD5173 specifically distinguishes itself within the family by providing two independent channels and hardware addressability features suitable for complex multi-device systems.

Replacement Considerations

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