AD5161BRM100

Overview

The AD5161BRM100 is a single-channel, 8-bit digital potentiometer featuring 256 adjustable tap positions. It offers a nominal end-to-end resistance of 100 kΩ with a tolerance of ±30% and a temperature coefficient of 45 ppm/°C. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical supply current of 8 µA. It supports both SPI and I2C interfaces via a pin-selectable DIS input. The component is housed in a compact MSOP-10 package (3 mm × 4.9 mm) and functions within an operating temperature range of −40°C to +125°C.

Feature Summary

• Pin-selectable SPI or I2C compatible digital interface for flexible system integration
• 256-position resolution with full read/write capability for the wiper register
• Power-on preset function initializes the wiper to midscale upon startup
• SDO output enables daisy-chaining multiple devices using a single control line

Applications

• Replacement for mechanical potentiometers in new designs
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors
• RF amplifier biasing circuits
• Gain control and offset adjustment in signal conditioning chains

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact resistance value and packaging type. Ensure that the selected variant matches the required interface configuration and thermal specifications for the target application environment.

Selection Notes

Select this component when a solid-state solution for variable resistance is required with enhanced reliability over mechanical alternatives. Consider the 100 kΩ nominal resistance and ±30% tolerance limits. Verify that the system power supply remains within the 2.7 V to 5.5 V range and that the interface protocol matches the DIS pin configuration.

Part Context

This part belongs to the AD5161 family of 256-position digitally controlled variable resistors. The BRM100 designation indicates a commercial temperature grade device with a 100 kΩ nominal resistance packaged in MSOP-10. It serves as a direct electronic replacement for traditional three-terminal mechanical potentiometers.

Replacement Considerations

Direct replacements include other variants within the AD5161 series with different resistance values or packages. For non-volatile memory requirements, consider the AD5142 series. Ensure interface compatibility if substituting with other digital potentiometers.