AD5172BRMZ100

Overview

The AD5172BRMZ100 is a dual-channel, 256-position digital potentiometer from Analog Devices. It features one-time programmable (OTP) memory using fuse link technology to retain resistance settings without power. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and communicates via an I2C-compatible serial interface. Each channel provides a nominal end-to-end resistance of 100 kΩ with a temperature coefficient of 35 ppm/°C. The unit is housed in a compact 10-lead MSOP package.

Feature Summary

• Dual-channel architecture with 256 adjustable positions per channel
• One-time programmable (OTP) fuse link technology for permanent setting retention
• I2C-compatible 2-wire serial interface for control and data transfer
• Low power consumption with maximum supply current of 6 µA
• Wide operating temperature range from −40°C to +125°C

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 circuits
• Gain control and offset adjustment in electronic systems

Procurement Notes

Verify the specific ordering suffix 'MZ' confirms the MSOP-10 package type and lead-free status. Confirm the '100' suffix indicates the 100 kΩ resistance value. Ensure the OTP programming capability aligns with the application's need for non-volatile storage. Check for any recent Product Change Notices regarding pinout or electrical specifications.

Selection Notes

Select this component when a dual-channel solution with permanent resistance settings is required. The 100 kΩ value suits applications needing higher impedance levels compared to the 2.5 kΩ or 10 kΩ variants. The I2C interface minimizes pin count, making it suitable for space-constrained designs. Consider the OTP feature if dynamic adjustments are not needed after initial programming.

Part Context

The AD5172 is part of the AD517x family of digital potentiometers, which also includes the AD5173. The primary distinction between these models is the address decoding capability; the AD5173 includes additional pins (AD0, AD1) for multiple device addressing on the same bus, whereas the AD5172 has fixed addressing. Both share identical electrical characteristics and OTP functionality.

Replacement Considerations

Direct replacements within the same family include the AD5172BRM25 (2.5 kΩ) and AD5172BRM10 (10 kΩ) for different resistance requirements. For single-channel applications, the AD5170 series may be considered. Note that the AD5173 offers multi-device addressing capabilities if bus expansion is needed.