AD7809 Datasheet | Analog Devices

a Features Four 10-Bit DACs in One Package Serial and Parallel Loading Facilities Available AD7804 Quad 10-Bit Serial Loading AD7805 Quad 10-Bit Parallel Loading AD7808 Octal 10-Bit Serial Loading AD7809 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 APPLICATIONS Optical Disk Drives Instrumentation and munication Systems Process Control and Voltage Setpoint Control Trim Potentiometer Replacement Automatic Calibration GENERAL DESCRIPTION +3.3 V to +5 V Quad/Octal 10-Bit DACs AD7804/AD7805/AD7808/AD7809- FUNCTIONAL BLOCK DIAGRAMS AVDD DVDD REFOUT REFIN AVDD DIVIDER P CHANNEL D CONTROL REG DATA REGISTER VBIAS DAC C DAC REGISTER MUX 1.23V REF AGND DGND VOUTF- POWER ON RESET AD7804/ AD7808 VBIAS DAC D VOUTE- VOUTD VOUTC CHANNEL C CONTROL REG DATA REGISTER VBIAS MUX DAC REGISTER DAC B VOUTB CHANNEL B CONTROL REG DATA REGISTER VBIAS DAC REGISTER DAC A VOUTA PD- - CHANNEL A CONTROL REG SYSTEM CONTROL REG DATA REGISTER DAC REGISTER VOUTH- 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 VBIAS ± VSWING. VSWING is 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 plete transfer function of each individual DAC can be shifted around the VBIAS point using an on-chip Sub DAC. All DACs contain double buffered data inputs, which allow all...