AD7305BRU-REEL7

Overview

The AD7305BRU-REEL7 is a quad, 8-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features a fast parallel interface and operates from single +3 V to +5 V or ±5 V supplies. The device includes internal precision buffers with rail-to-rail output swing capability. Key electrical parameters include an 8-bit resolution, 1 MS/s sampling rate, and a settling time of 1 µs to ±0.1% full scale. It consumes less than 9 mW at 3 V and supports a reference multiplying bandwidth of 2.6 MHz.

Feature Summary

• Quad 8-bit DAC architecture with internal power-on reset
• Fast parallel data interface with standard address decode
• Rail-to-rail buffered voltage outputs compatible with REF input range
• 40 µA power shutdown mode activated by floating the A0/SHDN pin

Applications

• Automotive output span voltage control
• Instrumentation and digitally controlled calibration systems
• Pin-compatible replacement for AD7226 when supply voltage is below 5.5 V

Procurement Notes

Verify the package type matches the application requirements, as the BRU suffix indicates a TSSOP-20 surface-mount package. Confirm that the design utilizes a parallel interface, as this component differs from the serial AD7304 variant. Ensure the system provides appropriate logic levels for the parallel data inputs and write control signals.

Selection Notes

Select the AD7305BRU-REEL7 when a parallel interface is preferred over the serial option provided by the AD7304. This part is suitable for designs requiring four independent 8-bit channels with rail-to-rail output swings. Verify that the available PCB space accommodates the 20-lead TSSOP package and that the supply voltage remains within the 2.7 V to 5.5 V range.

Part Context

This component belongs to the AD7304/AD7305 family of quad, 8-bit DACs. While the AD7304 utilizes a 3-wire SPI-compatible serial interface, the AD7305 employs a parallel interface. Both devices share identical internal DAC architectures and performance characteristics, differing primarily in their digital input methods and reference input configurations.

Replacement Considerations

The datasheet identifies the AD7305 as a pin-compatible replacement for the industry-standard AD7226 when operating with a supply voltage less than 5.5 V.