AD7805BRZ-REEL

Overview

The AD7805BRZ-REEL is a quad 10-bit digital-to-analog converter (DAC) from Analog Devices, featuring parallel load capabilities. It operates on a single +3.3 V to +5 V power supply and incorporates an on-chip bandgap reference outputting typically 1.23 V. The device provides four buffered voltage outputs with a swing centered around VBIAS. Key electrical parameters include a maximum relative accuracy of ±3 LSB for B grade, a settling time of 4 ms max, and a typical glitch impulse of 1 nV-s. It supports dual external reference inputs via REFIN and COMP pins.

Feature Summary

• Quad 10-bit resolution with parallel data interface
• Integrated 1.23 V bandgap reference and on-chip control registers
• Double-buffered DAC registers allowing simultaneous analog updates
• Supports System Standby and Power-Down modes for low power consumption

Applications

• Optical disk drives
• Process control and voltage setpoint control systems
• Instrumentation and communication equipment
• Automatic calibration circuits

Procurement Notes

Verify the 'REEL' suffix indicates tape-and-reel packaging when sourcing. Confirm the 'B' grade designation matches the required ±3 LSB accuracy specification. Ensure the operating temperature range of -40°C to +85°C aligns with system requirements. Check for ESD sensitivity precautions during handling.

Selection Notes

Select this component over serial variants like the AD7804 if a parallel bus interface is preferred. Consider the AD7809 if octal channel density is required instead of quad. Verify that the 2 kΩ minimum load resistance requirement fits the application's drive capability needs.

Part Context

This part belongs to the AD780x family of CMOS DACs. It shares architectural similarities with the AD7804 (serial), AD7808 (serial octal), and AD7809 (parallel octal). The BRZ suffix denotes a lead-free RoHS-compliant 28-lead SOIC package.

Replacement Considerations

Direct functional substitutes within the same parallel-load family include the AD7809 for higher channel counts. For serial interfaces, the AD7804 offers equivalent performance in a smaller footprint.