AD5173BRM100

Overview

The AD5173BRM100 is a dual-channel, 256-position digital potentiometer from Analog Devices. It features one-time programmable (OTP) memory for permanent resistance settings and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device utilizes an I2C-compatible serial interface for control and includes dedicated address pins (AD0, AD1) for multiple package decoding. Each channel offers an end-to-end resistance of 100 kΩ with a low temperature coefficient of 35 ppm/°C. The component is housed in a compact 10-lead MSOP package and supports operation across a wide temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 256 tap positions per channel
• One-time programmable (OTP) fuse link technology for nonvolatile storage
• I2C-compatible 2-wire serial interface with hardware address selection via AD0 and AD1 pins
• Low power consumption with maximum supply current of 6 µA

Applications

• Systems calibration and electronics level setting
• Replacement for mechanical trimmers in new designs
• Transducer adjustment for pressure, temperature, and optical sensors
• RF amplifier biasing and gain control

Procurement Notes

Verify the specific ordering suffix for the 100 kΩ variant, as the AD5173 series includes 2.5 kΩ and 10 kΩ options. Confirm that the application circuit can provide the required 5.6 V to 5.8 V OTP programming voltage if permanent settings are needed. 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 are used on the same bus, as the AD5173 provides two additional address pins (AD0 and AD1) for unique device identification. Choose this model for applications requiring a fixed 100 kΩ resistance value. Verify that the system power supply can support the temporary high-voltage requirement for OTP activation if permanent configuration is desired.

Part Context

This component belongs to the AD517x family of digital potentiometers, which utilize thin-film resistor technology for stability. The AD5173 specifically distinguishes itself within the family by offering dual channels and enhanced addressability compared to the single-channel AD5172. It serves as a solid-state alternative to variable resistors, providing superior reliability and lower temperature drift.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.