AD5161BRM5-RL7

Overview

The AD5161BRM5-RL7 is a single-channel, 8-bit digital potentiometer with a nominal end-to-end resistance of 5 kΩ. It features 256 tap positions and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device supports both SPI and I2C interfaces via a pin-selectable Digital Interface Select (DIS) pin. Key electrical characteristics include a maximum wiper resistance of 120 Ω, a temperature coefficient of 45 ppm/°C, and a typical supply current of 8 μA. It is housed in a compact MSOP-10 package.

Feature Summary

• Pin-selectable SPI or I2C compatible serial interface
• 256-position resolution with linear taper
• Single supply operation from 2.7 V to 5.5 V
• Power-on preset to midscale position

Applications

• Mechanical potentiometer replacement in new designs
• Transducer adjustment for pressure, temperature, and optical sensors
• RF amplifier biasing
• Gain control and offset adjustment circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details such as reel size or tape width. Confirm that the DIS pin configuration matches the intended bus protocol before integration. Ensure ESD protection measures are implemented during handling due to the CMOS input structure.

Selection Notes

Select this component when a single-channel variable resistor with 8-bit precision is required. The 5 kΩ resistance value is suitable for moderate current applications. Verify that the system logic levels are compatible with the 2.7 V to 5.5 V operating range. Consider the MSOP-10 package dimensions if board space is constrained.

Part Context

This part belongs to the AD5161 family of 256-position digital potentiometers. Variants within the family differ primarily by nominal resistance values (5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ) and package options. All variants share the same functional architecture, interface protocols, and pinout configuration.

Replacement Considerations

Direct replacements must match the 5 kΩ resistance, 8-bit resolution, and MSOP-10 package. Check for compatibility with existing SPI/I2C timing requirements and voltage levels. Note that some competitors may offer non-volatile memory, which this volatile version lacks.