AD7304BR-REEL

Overview

The AD7304BR-REEL is a quad, 8-bit digital-to-analog converter (DAC) from Analog Devices. It operates from single +3 V to +5 V or ±5 V supplies, consuming less than 9 mW at 3 V. The device features rail-to-rail buffered voltage outputs and an SPI-compatible 3-wire serial interface using SDI, CLK, and CS pins. Key specifications include 1 LSB maximum integral and differential nonlinearity, a 2.6 MHz reference multiplying bandwidth, and a settling time of 1 µs to ±0.1% full scale. An internal power-on reset ensures zero-scale output at startup.

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 allowing full-scale voltage equal to supply rails
• Internal power-on reset and 40 µA hardware shutdown capability

Applications

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

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging. Confirm the BR suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure the specific reel quantity matches project requirements, as packaging formats vary within the AD7304 family.

Selection Notes

Select the AD7304BR-REEL over the AD7305 if a serial interface is preferred over parallel inputs. This component is suitable for applications requiring low power consumption under 3 V operation. Verify that the required settling time of 1 µs meets system timing constraints compared to faster DAC alternatives.

Part Context

The AD7304 belongs to the AD7304/AD7305 family of quad 8-bit DACs. The primary distinction between these models is the input interface: the AD7304 utilizes a serial interface, while the AD7305 uses a parallel interface. Both share identical analog performance characteristics and pinouts for their respective packages.

Replacement Considerations

The datasheet identifies the AD7304 as a pin-compatible replacement for the AD7226 when operating with VDD less than 5.5 V. No other direct substitute part numbers are documented in the provided source material.