AD7805BRSZ-REEL

Overview

The AD7805BRSZ-REEL 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. Static performance includes a maximum relative accuracy of ±3 LSBs and a voltage output settling time of 4 ms max. Power consumption is 12 mA max in normal mode, reducing to 0.8 mA in power-down mode.

Feature Summary

• Quad 10-bit resolution with parallel loading interface
• Integrated on-chip 1.23 V bandgap reference
• Double-buffered DAC registers for synchronized updates
• On-chip control registers for individual channel standby and clear functions

Applications

• Optical disk drives
• Instrumentation and communication systems
• Process control and voltage setpoint control
• Trim potentiometer replacement
• Automatic calibration

Procurement Notes

Verify the package type matches the RS-28 (Shrink Small Outline Package) specification for the BRSZ suffix. Confirm the temperature range corresponds to the commercial grade (-40°C to +85°C). Ensure the reel packaging aligns with production requirements. Cross-reference the specific revision level against current manufacturing notices.

Selection Notes

Select this model over the AD7804 if a parallel interface is required instead of serial. Consider the AD7809 for octal configurations. Verify that the 10-bit resolution and ±3 LSB accuracy meet system linearity requirements. Ensure the 2 kΩ minimum load resistance constraint fits the application circuit design.

Part Context

This component belongs to the AD7804/AD7805/AD7808/AD7809 family of low-power CMOS DACs. The AD7805 variant specifically provides four channels with parallel data input, distinguishing it from the serial-loaded AD7804. The 'B' indicates the accuracy grade, while 'R' denotes the SOIC package and 'S' indicates the shrink variant.

Replacement Considerations

Direct functional substitutes within the same family include the AD7805BR (standard SOIC) or AD7805BN (DIP). For higher channel counts, the AD7809 offers an octal configuration. Serial interface alternatives include the AD7804.