AD7304BRU-REEL7

Overview

The AD7304BRU-REEL7 is a quad, 8-bit digital-to-analog converter (DAC) from Analog Devices. It operates on single +3 V to +5 V or ±5 V supplies with power dissipation under 9 mW at 3 V. The device features rail-to-rail buffered voltage outputs and an SPI-compatible serial interface using SDI, CLK, and CS pins. Key electrical parameters include 1 LSB maximum integral and differential nonlinearity, 1 µs typical settling time, and a 2.6 MHz reference multiplying bandwidth. It includes internal power-on reset and hardware shutdown capabilities.

Feature Summary

• Quad 8-bit DAC architecture with independent rail-to-rail buffered outputs
• SPI-compatible 3-wire serial interface for data input
• Rail-to-rail reference input range allowing full-scale output equal to supply rails
• Internal power-on reset ensures zero-scale output state upon startup

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific BRU suffix indicates the automotive temperature grade (-40°C to +125°C) and TSSOP-16 package. Request original datasheets and material safety data sheets prior to acquisition to ensure compliance with project specifications.

Selection Notes

Select this component for applications requiring four independent 8-bit voltage outputs in a compact surface-mount package. Ensure the system supports SPI communication protocols. Verify that the external reference voltage remains within the VSS to VDD range. Consider the 120 kΩ shutdown resistance if low-power standby modes are required by the design.

Part Context

This part belongs to the AD7304/AD7305 family of quad 8-bit DACs. The AD7304 variant specifically utilizes a serial interface, whereas the AD7305 uses parallel inputs. Both share identical analog performance characteristics and pinouts for their respective packages, differing primarily in digital control logic.

Replacement Considerations

The AD7304 serves as a pin-compatible replacement for the AD7226 when the supply voltage is less than 5.5 V. Designers must account for differences in interface types, as the AD7226 typically employs a parallel interface while the AD7304 uses serial control.