AD7805BR-REEL

Overview

The AD7805BR-REEL is a quad 10-bit digital-to-analog converter (DAC) from Analog Devices, featuring parallel load capabilities. It operates on a +3.3 V to +5 V power supply and incorporates an on-chip reference. The device provides output signals in the form of VBIAS – VSWING, where VSWING is derived internally from VBIAS. On-chip control registers include a system control register and channel control registers for individual DAC management. All DACs contain double-buffered data inputs, allowing simultaneous analog output updates via the asynchronous LDAC input.

Feature Summary

• Quad 10-Bit Resolution with Parallel Loading
• +3.3 V to +5 V Single Supply Operation
• On-Chip Reference with Double Buffered DAC Registers
• Individual Channel Control and Power Down Modes

Applications

• Optical Disk Drives
• Instrumentation and Communication Systems
• Process Control and Voltage Setpoint Control
• Trim Potentiometer Replacement
• Automatic Calibration

Procurement Notes

Verify the specific grade (B or C) and package type (SOIC-28) against the datasheet specifications. Confirm that the REEL suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure compatibility with the required operating temperature range of -40°C to +85°C for commercial plastic versions.

Selection Notes

Select the AD7805BR-REEL when parallel interface timing is preferred over serial loading. Compare B Grade (3 LSB max relative accuracy) versus C Grade (4 LSB max) requirements. Ensure the application can accommodate the typical 1.5 ms settling time and 2.5 V/ms slew rate. Verify that the internal 1.23 V reference meets the system's precision needs or if external REFIN is required.

Part Context

The AD7805 is part of the AD7804/AD7805/AD7808/AD7809 family of 10-bit DACs. While the AD7804 and AD7808 offer serial loading, the AD7805 and AD7809 provide parallel loading facilities. This family shares similar architectural features, including on-chip references and control registers, differing primarily in interface type and channel count (quad vs. octal).

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.