AD5162BRM2.5

Overview

The AD5162BRM2.5 is a dual-channel, 8-bit digital potentiometer with 256 tap positions and a nominal end-to-end resistance of 2.5 kΩ. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a maximum supply current of 6 µA. The device features an SPI-compatible 3-wire serial interface for full read/write access to the wiper registers. Key electrical characteristics include a typical settling time of 1 µs, a temperature coefficient of 35 ppm/°C, and a wiper resistance of 200 Ω maximum. It is housed in a compact 10-lead MSOP package measuring 3 mm × 4.9 mm.

Feature Summary

• Dual-channel architecture with 256 linearly spaced tap positions per channel
• SPI-compatible 3-wire serial interface (SDI, CLK, CS) for register control
• Low power consumption with supply current typically under 6 µA
• Power-on preset function initializes wipers to midscale automatically

Applications

• Systems calibration and permanent factory PCB setting
• Replacement for mechanical trimmers in new designs
• Gain control and offset adjustment circuits
• RF amplifier biasing and transducer adjustment

Procurement Notes

Verify the specific suffix 'RL7' against the manufacturer's ordering guide to confirm reel packaging quantities and tape specifications. Confirm RoHS compliance status as indicated in the latest datasheet revision, noting that older stock may differ. Ensure the MSOP-10 footprint matches the design layout constraints before procurement.

Selection Notes

Select this component when a low-profile, dual-channel digital potentiometer is required for space-constrained applications. The 2.5 kΩ resistance value is suitable for moderate current applications where lower thermal noise is beneficial compared to higher resistance variants. Verify that the system microcontroller supports the required SPI clock frequency of up to 25 MHz.

Part Context

The AD5162 series includes variants with different end-to-end resistances: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. The BRM prefix indicates the commercial temperature range (-40°C to +125°C) and the MSOP package type. This specific model represents the lowest resistance option in the standard lineup, offering higher bandwidth capabilities than the higher resistance versions.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD5162BRMZ10, AD5162BRMZ50, and AD5162BRMZ100, which share identical pinouts but differ in nominal resistance values. Cross-family comparisons should consider the AD5163 or AD5164 if non-volatile memory storage is required instead of volatile settings.