AD5161BRMZ5

Overview

The AD5161BRMZ5 is a single-channel, 256-position digital potentiometer from Analog Devices. It features a nominal end-to-end resistance of 5 kΩ with a ±30% tolerance 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 offers a pin-selectable interface supporting both SPI and I2C protocols for wiper control and readback. Packaged in a compact MSOP-10 form factor (3 mm × 4.9 mm), it includes power-on preset functionality to midscale.

Feature Summary

• 256-position adjustment with linear taper and 8-bit resolution
• Pin-selectable SPI or I2C compatible digital interface
• 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, position, chemical, and optical sensors
• RF amplifier biasing
• Gain control and offset adjustment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and shipping quantity. The BRMZ5 designation indicates a specific reel or tube configuration; ensure compatibility with automated assembly equipment requirements. Cross-reference the part number with the latest datasheet revision to confirm electrical characteristics and pinout definitions.

Selection Notes

Select this component when a solid-state replacement for mechanical potentiometers is required in space-constrained designs. The 5 kΩ resistance value is suitable for applications requiring moderate current handling without excessive power dissipation. Ensure the system logic levels are compatible with the 2.7 V to 5.5 V operating range and that the chosen interface mode (SPI or I2C) matches the microcontroller capabilities via the DIS pin configuration.

Part Context

The AD5161BRMZ5 belongs to the AD5161 family of 256-position digital potentiometers. This series provides variable resistance adjustments using thin-film technology for low temperature coefficients. The BRMZ5 variant specifically denotes the 5 kΩ resistance version housed in an MSOP-10 package, distinguishing it from other resistance values like 10 kΩ, 50 kΩ, or 100 kΩ within the same functional family.

Replacement Considerations

Direct replacements include other AD5161 variants with different resistance values (e.g., AD5161BRMZ10 for 10 kΩ) if the circuit allows for resistance scaling. Verify that any substitute maintains the same MSOP-10 footprint and pinout compatibility.