AD5173BRMZ100

Overview

The AD5173BRMZ100 is a dual-channel, 256-position digital potentiometer from Analog Devices. It features one-time programmable (OTP) memory using fuse link technology for permanent resistance retention. 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. Each channel provides 256 tap positions with a nominal end-to-end resistance of 100 kΩ. Key electrical characteristics include a maximum supply current of 6 µA, a temperature coefficient of 35 ppm/°C, and a typical power-on settling time of 5 µs.

Feature Summary

• Dual-channel architecture with independent 8-bit wiper control
• One-time programmable (OTP) fuse link technology for non-volatile storage
• I²C-compatible 2-wire serial interface with additional address pins (AD0, AD1)
• Low power consumption with 6 µA maximum supply current

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 resistance value suffix (e.g., 100 for 100 kΩ) when ordering, as the base model number covers multiple resistance options. Confirm that the design supports the required OTP programming voltage (5.6 V to 5.8 V) if permanent settings are needed. Ensure the PCB layout accounts for the MSOP-10 package dimensions and thermal requirements.

Selection Notes

Select the AD5173 over the AD5172 if multiple devices require unique addressing on the same I²C bus, as the AD5173 includes dedicated AD0 and AD1 pins for hardware address decoding. Choose this component for applications requiring permanent factory-set values without the cost of external EEPROM. Verify that the 100 kΩ resistance value meets the circuit's impedance and bandwidth requirements.

Part Context

This component belongs to the AD517x family of digital potentiometers, which utilize thin-film technology for low temperature coefficients. The AD5173 variant specifically distinguishes itself from the AD5172 by providing two extra pins for address configuration, facilitating multi-device systems. It serves as a solid-state alternative to mechanical potentiometers in precision adjustment scenarios.

Replacement Considerations

The AD5172BRMZ100 is a compatible substitute if multi-device addressing is not required, as it lacks the AD0 and AD1 pins. Both parts share identical electrical specifications and pinouts for the primary functional terminals.