AD5173BRMZ50

Overview

The AD5173BRMZ50 is a dual-channel, 256-position digital potentiometer featuring one-time programmable (OTP) memory. It utilizes fuse link technology to permanently retain resistance settings after activation. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and communicates via an I²C-compatible 2-wire serial interface. Key electrical parameters include a nominal resistor tolerance of ±20%, a temperature coefficient of 35 ppm/°C, and a maximum supply current of 6 µA. The unit is housed in a compact 10-lead MSOP package with dimensions of 3 mm × 4.9 mm.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for permanent setting retention
• I²C-compatible 2-wire serial interface with dedicated address decode pins (AD0, AD1)
• Low power consumption with 6 µA maximum supply current

Applications

• Systems calibration requiring 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

Procurement Notes

Verify the specific end-to-end resistance value (2.5 kΩ, 10 kΩ, or 100 kΩ) required for the application, as the base part number covers multiple resistance options. Confirm that the design supports the temporary OTP overwrite feature if dynamic adjustments are needed before final programming. Ensure the power supply can provide the necessary voltage range for operation and OTP activation.

Selection Notes

Select this component when non-volatile memory is required without the cost of EEPROM. The AD5173 includes extra address pins (AD0, AD1) compared to the AD5172, allowing multiple devices on the same bus. Verify that the system can handle the 5.6 V to 5.8 V requirement during the OTP programming phase, which differs from the standard 2.7 V to 5.5 V operating range.

Part Context

The AD5173 belongs to the Analog Devices AD517x family of digital potentiometers. It shares functional similarities with the AD5172 but distinguishes itself through additional hardware address decoding capabilities. This family employs thin-film technology for low temperature coefficients and offers a solid-state alternative to mechanical variable resistors.

Replacement Considerations

Public confirmed substitute part numbers: AD5172BRMZ50.