AD5161BRM10

Overview

The AD5161BRM10 is a single-channel, 8-bit digital potentiometer from Analog Devices. It features a nominal end-to-end resistance of 10 kΩ with a tolerance of ±30% and a temperature coefficient of 45 ppm/°C. The device provides 256 tap positions and operates on a single supply voltage ranging from 2.7 V to 5.5 V. It supports both SPI and I²C interfaces via a pin-selectable DIS input. Packaged in a compact MSOP-10 format (3 mm × 4.9 mm), it consumes 8 μA at 5 V and includes power-on preset to midscale.

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 wiper preset to midscale

Applications

• Mechanical potentiometer replacement
• 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 current data sheet to confirm package type and resistance value. Confirm RoHS compliance status as specifications may vary by revision. Check for obsolescence notices or lifecycle changes directly from Analog Devices before finalizing procurement plans.

Selection Notes

Select this component when a single-channel digital potentiometer with 10 kΩ nominal resistance is required. Ensure the system interface matches the DIS pin configuration for either SPI or I²C. Verify that the 256-tap resolution meets the application's precision requirements and that the operating voltage range aligns with the system power supply.

Part Context

The AD5161 belongs to the AD516x family of 256-position digital potentiometers. This series offers various resistance values including 5 kΩ, 50 kΩ, and 100 kΩ options. The BRM10 variant specifically denotes the 10 kΩ resistance version housed in the MSOP-10 package.

Replacement Considerations

Direct replacements within the same family include AD5161BRM5 (5 kΩ) and AD5161BRM50 (50 kΩ). For dual-channel applications, consider the AD5162 series. Ensure interface compatibility and pin-out alignment when substituting with other digital potentiometer ICs.

FAQ

How is the digital interface selected?

The interface is selected via the DIS (Digital Interface Select) pin. Tying DIS low enables SPI mode, while tying DIS high enables I²C mode.

What is the wiper resistance?

The typical wiper resistance (RW) is 50 Ω, with a maximum of 120 Ω at VDD = 5 V.

Can multiple devices be daisy-chained?

Yes, in SPI mode, the SDO output allows multiple AD5161 devices to be daisy-chained from a single processor serial data line.