AD7804BR

Overview

The AD7804BR is a quad 10-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead SOIC package. It operates on a single +3.3 V to +5 V supply and features serial loading capabilities via FSIN, CLKIN, and SDIN pins. The device incorporates an on-chip 1.23 V bandgap reference and includes double-buffered data registers for simultaneous analog output updates using the LDAC input. Key specifications include a maximum settling time of 4 ms, a gain error of ±3% FSR, and power dissipation of 66 mW in normal mode.

Feature Summary

• Quad 10-bit resolution with serial interface control
• Integrated 1.23 V internal bandgap reference
• Double-buffered DAC registers for synchronized updates
• On-chip Sub DAC for transfer function shifting

Applications

• Optical disk drives
• Process control systems
• Voltage setpoint control
• Automatic calibration circuits

Procurement Notes

Verify the specific suffix 'R' against the manufacturer's ordering guide to confirm the package type is the 16-lead Small Outline IC (SOIC). Confirm that the B grade accuracy meets the application requirements for relative accuracy and gain error specifications.

Selection Notes

Select this component when a quad-channel 10-bit DAC with serial control is required. Ensure the system supports the synchronous serial timing parameters for FSIN, CLKIN, and SDIN. Verify that the +3.3 V to +5 V supply range aligns with the design voltage constraints.

Part Context

The AD7804 is part of the AD7804/AD7805/AD7808/AD7809 family. While the AD7805 uses parallel loading, the AD7804 specifically utilizes serial inputs. It shares architectural similarities with the octal AD7808 but is limited to four channels in a smaller footprint.

Replacement Considerations

The AD7804BN is a direct pin-compatible alternative in a 16-lead Plastic DIP package.