AD7805CRZ-REEL7

Overview

The AD7805CRZ-REEL7 is a quad 10-bit digital-to-analog converter (DAC) with parallel load capabilities, manufactured by Analog Devices Inc. It operates from a +3.3 V to +5 V power supply and incorporates an on-chip bandgap reference outputting typically 1.23 V. The device features double-buffered data inputs for simultaneous analog updates via the LDAC pin. Key electrical parameters include a maximum relative accuracy of ±3 LSBs, a settling time of 4 ms max, and a typical glitch impulse of 1 nV-s. It supports both two's complement and offset binary input coding schemes.

Feature Summary

• Quad 10-bit resolution with parallel data interface
• Integrated on-chip 1.23 V bandgap reference
• Double-buffered DAC registers for simultaneous updates
• Supports system standby 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 that the REEL7 suffix indicates tape and reel packaging suitable for automated surface-mount assembly. Confirm the C grade designation corresponds to the specified ±3 LSB relative accuracy and commercial temperature range of –40°C to +85°C during component qualification.

Selection Notes

Select this model when a parallel interface is required instead of the serial AD7804. Ensure the application utilizes a single supply between 3.3 V and 5 V. Consider the AD7809 if octal channel density is needed, or the AD7804/AD7808 if serial loading reduces pin count requirements.

Part Context

This component belongs to the AD780x family of low-power CMOS DACs. The AD7805 variant specifically provides four channels with parallel loading, distinguishing it from the serial-loaded AD7804. The 'C' grade denotes commercial performance specifications, while the 'RZ' indicates a lead-free SOIC package.

Replacement Considerations

The AD7805BRZ offers identical functionality with B grade accuracy. For higher channel counts, the AD7809 serves as the octal parallel equivalent. Serial alternatives include the AD7804 and AD7808.