AD5207BRU50

Overview

The AD5207BRU50 is a dual-channel, 8-bit digital potentiometer with 256 tap positions and a nominal resistance of 50 kΩ. It operates on a single supply from 2.7 V to 5.5 V or a dual supply of ±2.2 V to ±2.7 V. The device features a 3-wire SPI-compatible serial interface for data input and includes a power-down mode consuming less than 5 µA. Key electrical parameters include a wiper resistance of 100 Ω maximum, a temperature coefficient of 500 ppm/°C, and a –3 dB bandwidth of 125 kHz at the 50 kΩ setting. It is housed in a TSSOP-14 package.

Feature Summary

• Dual-channel architecture with 256 programmable positions per channel
• 3-Wire SPI-compatible serial control interface with daisy-chain capability via SDO
• Power shutdown mode reduces current consumption to under 5 µA
• Midscale preset function activates automatically during power-on reset

Applications

• Mechanical potentiometer replacement in space-constrained designs
• Stereo channel audio level control
• Instrumentation gain and offset adjustment
• Programmable voltage-to-current conversion circuits
• Line impedance matching applications

Procurement Notes

Verify the specific ordering suffix (e.g., REEL7) against the required packaging format, as tube and reel options exist within the family. Confirm that the BRU variant meets the necessary industrial temperature range requirements (-40°C to +125°C). Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS inputs. Cross-reference the pinout with legacy components like the AD8402 if drop-in replacement is intended.

Selection Notes

Select this component when a dual-channel solution is required within a single TSSOP-14 footprint. The 50 kΩ value offers a balance between noise performance and drive capability compared to 10 kΩ or 100 kΩ variants. Consider the volatile memory type; if non-volatile storage is needed, alternative models such as the AD5231 should be evaluated. Verify that the system logic levels are compatible with the 3-wire serial interface requirements.

Part Context

This part belongs to the AD5207 series of 256-position digital potentiometers manufactured by Analog Devices. It serves as an electronic alternative to mechanical pots, offering improved reliability and smaller form factors. The 'BRU' designation indicates the industrial temperature grade and the thin TSSOP-14 package style suitable for PCMCIA and portable applications.

Replacement Considerations

The datasheet notes compatibility with the AD8402 for drop-in replacement purposes due to identical address bit structures. Designers replacing mechanical potentiometers should account for the finite wiper resistance (approx. 100 Ω max) which prevents true zero-scale resistance.