AD7305BRUZ-REEL7

Overview

The AD7305BRUZ-REEL7 is a quad, 8-bit digital-to-analog converter (DAC) from Analog Devices. It features a fast parallel interface and operates on single supplies of +2.7 V to +5.5 V or dual supplies of ±5 V. The device includes four internal precision buffers with rail-to-rail output swing capability. Key specifications include a maximum settling time of 1 µs, integral nonlinearity (INL) and differential nonlinearity (DNL) of ±1 LSB, and a reference multiplying bandwidth of 2.6 MHz. It consumes less than 9 mW at 3 V and supports an extended industrial temperature range of -40°C to +85°C.

Feature Summary

• Quad 8-bit DAC architecture with voltage buffered outputs
• Fast parallel data interface with standard address decode
• Rail-to-rail REF input to voltage output swing capability
• Internal power-on reset ensures zero-scale state at turn-on

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 the specific package configuration against the datasheet outline dimensions. Confirm that the parallel interface requirements match the system design, as this model differs from the serial AD7304 variant. Ensure supply voltages remain within the specified 2.7 V to 5.5 V range for optimal performance.

Selection Notes

Select the AD7305BRUZ-REEL7 when a parallel interface is preferred over the serial AD7304. This component is suitable for applications requiring simultaneous updates via the LDAC strobe. Verify that the 20-lead TSSOP footprint fits the PCB layout constraints and that the 1 µs settling time meets the system speed requirements.

Part Context

This part belongs to the AD7304/AD7305 family of low-power, quad 8-bit DACs. While the AD7304 utilizes a 3-wire SPI-compatible serial interface, the AD7305 employs a parallel interface. Both share identical internal R-2R ladder architectures and rail-to-rail buffer characteristics, differing primarily in data loading methods and pin configurations.

Replacement Considerations

The AD7305 is explicitly documented as a pin-compatible replacement for the industry-standard AD7226 when the supply voltage is less than 5.5 V. Designers should verify that the AD7226's specific timing or electrical parameters are fully covered by the AD7305 specifications before substitution.