AD5173BRM100-RL7

Overview

The AD5173BRM100-RL7 is a dual-channel, 256-position, one-time programmable (OTP) digital potentiometer manufactured by Analog Devices Inc. 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 end-to-end resistance options of 2.5 kΩ, 10 kΩ, and 100 kΩ, with the BRM100 variant specifically offering 100 kΩ per channel. It utilizes fuse link technology for nonvolatile memory retention, allowing permanent setting of resistance values after unlimited adjustments. Key electrical characteristics include a typical settling time of 2 µs, a low temperature coefficient of 35 ppm/°C, and a maximum supply current of 6 µA.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for permanent settings
• I2C-compatible serial interface with additional address decode pins (AD0, AD1)
• Wide operating temperature range from −40°C to +125°C

Applications

• Systems calibration and electronics level setting
• 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 ordering suffix to confirm the resistance value and package type, as the base model supports multiple resistance options. Confirm that the design accommodates the separate OTP programming voltage requirement (5.6 V to 5.8 V) if permanent storage is utilized. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS inputs and internal structures.

Selection Notes

Select the AD5173 over the AD5172 when multiple devices require unique addressing on the same I2C bus, as the AD5173 includes dedicated AD0 and AD1 pins for hardware address configuration. Choose the 100 kΩ variant (suffix 100) for applications requiring higher impedance levels. Consider the 10-lead MSOP package dimensions (3 mm × 4.9 mm) for space-constrained PCB layouts.

Part Context

This component belongs to the AD517x family of digital potentiometers, which also includes the AD5172. The primary distinction between the AD5172 and AD5173 is the inclusion of extra package address decode pins on the AD5173, facilitating multi-device systems without software-based address conflicts. Both share identical core functionality, including OTP capabilities and I2C communication protocols.

Replacement Considerations

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