Catalog
+3.3 V to +5 V Quad/Octal 10-Bit DAC
Key Features
• Four 10-Bit DACs in One Package
• Serial and Parallel Loading Facilities AvailableAD7804 Quad 10-Bit Serial LoadingAD7805 Quad 10-Bit Parallel LoadingAD7808 Octal 10-Bit Serial LoadingAD7809 Octal 10-Bit Parallel Loading
• +3.3 V to +5 V Operation
• Power-Down Mode
• Power-On Reset
• Standby Mode (All DACs/Individual DACs)
• Low Power All CMOS Construction
• 10-Bit Resolution
• Double Buffered DAC Registers
• Dual External Reference Capability
Description
AI
The AD7804/AD7808 are quad/octal 10-bit digital-to-analog converters, with serial load capabilities, while the AD7805/AD7809 are quad/octal 10-bit digital-to-analog converters with parallel load capabilities. These parts operate from a +3.3 V to +5 V (10%) power supply and incorporates an on-chip reference. These DACs provide output signals in the form of VBIASVSWING. VSWINGis derived internally from VBIAS. On-chip control registers include a system control register and channel control registers. The system control register has control over all DACs in the package. The channel control registers allow individual control of DACs. The complete transfer function of each individual DAC can be shifted around the VBIASpoint using an on-chip Sub DAC. All DACs contain double buffered data inputs, which allow all analog outputs to be simultaneously updated using the asynchronous LDAC input.ApplicationsOptical Disk DrivesInstrumentation and Communication SystemsProcess Control and Voltage Setpoint ControlTrim Potentiometer ReplacementAutomatic CalibrationData Sheet, Rev. A, 12/98
