AD7305BR-REEL

Overview

The AD7305BR-REEL is a quad, 8-bit digital-to-analog converter (DAC) from Analog Devices. It features four independent voltage-output channels with internal precision buffers that swing rail-to-rail. The device utilizes a fast parallel interface for data loading and supports operation from single +3 V to +5 V supplies or ±5 V dual supplies. Key electrical specifications include an integral nonlinearity (INL) of ±1 LSB maximum, a settling time of 1 µs to ±0.1% full scale, and a reference multiplying bandwidth of 2.6 MHz. Power consumption is less than 9 mW at 3 V, with a shutdown current of 40 µA.

Feature Summary

• Quad 8-bit DAC architecture with rail-to-rail buffered outputs
• Fast parallel interface with standard address decode and WR control
• Operates on single +2.7 V to +5.5 V or ±5 V supplies
• Internal power-on reset ensures zero-scale output at turn-on

Applications

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

Procurement Notes

Verify the specific package type associated with the BR suffix against the manufacturer's ordering guide, as the AD7305 family includes both SOIC and TSSOP variants. Confirm the REEL designation indicates tape-and-reel packaging rather than tube packaging when sourcing components. Cross-reference the revision level with the latest datasheet to ensure compatibility with design requirements.

Selection Notes

Select the AD7305 over the AD7304 when a parallel interface is preferred over serial communication. Ensure the application requires a common reference input, as the AD7305 shares one VREF pin across all channels unlike the AD7304. Verify that the system logic levels are compatible with the specified VIH and VIL thresholds for reliable data transfer.

Part Context

The AD7305 is part of the AD7304/AD7305 family of low-power, quad 8-bit DACs. It is functionally similar to the AD7304 but differs in its parallel input interface and single reference input configuration. The device is designed for applications requiring multiple analog outputs with minimal external component count and low power dissipation.

Replacement Considerations

The AD7305 serves as a pin-compatible replacement for the AD7226 when operating with supply voltages below 5.5 V. Designers should verify that the parallel interface timing requirements of the AD7305 meet the system's clock and setup/hold constraints.