AD7839

a FEATURES Eight 13-Bit DACs in One Package Voltage Outputs Offset Adjust for Each DAC Pair Reference Range of ؎5 V Maximum Output Voltage Range of ؎10 V Clear Function to User-Defined Voltage 44-Lead MQFP Package APPLICATIONS Automatic Test Equipment Process Control General Purpose Instrumentation Octal 13-Bit, Parallel Input, Voltage-Output DAC AD7839 GENERAL DESCRIPTION The AD7839 contains eight 13-bit DACs on one monolithic chip. It has output voltages with a full-scale range of ± 10 V from reference voltages of ± 5 V. The AD7839 accepts 13-bit parallel loaded data from the external bus into one of the input registers under the control of the WR, CS and DAC channel address pins, A0–A2. The DAC outputs are updated on reception of new data into the DAC registers. All the outputs may be updated simultaneously by taking the LDAC input low. Each DAC output is buffered with a gain-of-two amplifier into which an external DAC offset voltage can be inserted via the DUTGNDx pins. The AD7839 is available in a 44-lead MQFP package. FUNCTIONAL BLOCK DIAGRAM VCC VSS VDD VREF(+) AB VREF(–) AB DUTGND CD DUTGND AB AD7839 13 INPUT 13 REG A INPUT 13 REG B INPUT 13 REG C INPUT 13 REG D INPUT 13 REG E INPUT 13 REG F INPUT 13 REG G INPUT 13 REG H DAC REG A DAC REG B 13 DAC A R R VOUTA R R DB12 13 13 DAC B R VOUTB DB0 13 DAC REG C DAC REG D DAC REG E DAC REG F 13 DAC C R VOUTC R R 13 DAC D VOUTD WR CS A0 A1 A2 LDAC 13 13 DAC F ADDRESS DECODE 13 13 13 DAC E VOUTE R R VOUTF 13 DA...