AD7304BRZ-REEL

Overview

The AD7304BRZ-REEL is a quad, 8-bit digital-to-analog converter (DAC) from Analog Devices. It operates on a single +2.7 V to +5.5 V supply or ±5 V supplies, consuming less than 9 mW at 3 V. The device features four independent voltage-output DACs with internal precision buffers that swing rail-to-rail. It utilizes a 3-wire SPI-compatible serial interface for data input. Key specifications include ±1 LSB maximum integral and differential nonlinearity, a 2.6 MHz reference multiplying bandwidth, and an internal power-on reset function. The component is housed in a 16-lead TSSOP package.

Feature Summary

• Quad 8-bit resolution with rail-to-rail buffered outputs
• SPI-compatible 3-wire serial interface
• Internal power-on reset sets outputs to zero scale
• Low power consumption (<9 mW at 3 V supply)

Applications

• Automotive output span voltage control
• Instrumentation digitally controlled calibration
• 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 BRZ suffix denotes lead-free composition and RoHS compliance. Ensure the specific reel quantity matches production requirements, as standard reels may vary. Cross-reference the datasheet revision C specifications against current manufacturing notices.

Selection Notes

Select this model over the AD7305 if a serial interface is preferred over parallel. Ensure the application requires four independent reference inputs, as the AD7304 provides separate VREF pins per channel unlike the AD7305. Verify that the 8-bit resolution and 1 MS/s update rate meet system timing constraints. Check that the TSSOP-16 footprint fits the PCB layout.

Part Context

This part belongs to the AD7304/AD7305 family of quad 8-bit DACs. The AD7304 variant specifically implements a serial interface, whereas the AD7305 uses a parallel interface. Both share identical analog performance characteristics and pinouts for their respective packages. The BRZ designation confirms environmental compliance, while REEL specifies the bulk packaging format for automated assembly.

Replacement Considerations

The AD7304 is explicitly noted as a pin-compatible replacement for the AD7226 when operating with VDD less than 5.5 V. When substituting, verify that the legacy part's parallel interface requirements are addressed by the new serial logic or that the system design accommodates the interface change.