AD5207BRU100

Overview

The AD5207BRU100 is a dual-channel, 8-bit digital potentiometer with 256 tap positions and a nominal resistance of 100 kΩ. It operates on a single supply from 2.7 V to 5.5 V or dual supplies of ±2.2 V to ±2.7 V. The device features a 3-wire SPI-compatible serial interface for data input. Key electrical characteristics include a temperature coefficient of 500 ppm/°C, a wiper resistance of up to 100 Ω, and a shutdown current of less than 5 µA. It is housed in a TSSOP-14 package and functions over an extended industrial temperature range of –40°C to +125°C.

Feature Summary

• Dual-channel architecture with independent 8-bit RDAC latches
• 3-Wire SPI-compatible serial control interface with daisy-chain capability via SDO pin
• Power-down mode reduces current consumption to under 5 µA
• Midscale preset during power-on reset conditions

Applications

• Mechanical potentiometer replacement
• Stereo channel audio level control
• Instrumentation gain and offset adjustment
• Programmable voltage-to-current conversion
• Line impedance matching

Procurement Notes

Verify the specific ordering suffix (e.g., -REEL7) against the manufacturer's official documentation to confirm packaging type and quantity. Ensure the selected variant matches the required nominal resistance value of 100 kΩ. Confirm that the TSSOP-14 package dimensions align with the target PCB footprint requirements.

Selection Notes

Select this component when a dual-channel variable resistor with 256 discrete steps is required. The 100 kΩ nominal resistance suits applications needing higher impedance levels compared to the 10 kΩ or 50 kΩ variants. Verify that the system logic levels are compatible with the 3-wire serial interface and that the operating voltage falls within the 2.7 V to 5.5 V range.

Part Context

The AD5207 belongs to Analog Devices' family of 256-position digital potentiometers. It serves as a direct drop-in replacement for similar devices like the AD8402 due to compatible addressing schemes. The BRU100 designation specifically identifies the 100 kΩ resistance version packaged in a thin TSSOP-14 form factor suitable for space-constrained designs.

Replacement Considerations

The datasheet explicitly notes compatibility with the AD8402 for drop-in replacement purposes. Designers should verify pinout alignment and address bit decoding between the two parts to ensure seamless integration without additional external decoding logic.