AD7841

a FEATURES Eight 14-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 ؎15 V ؎ 10% Operation Clear Function to User-Defined Voltage 44-Lead MQFP Package APPLICATIONS Automatic Test Equipment Process Control General Purpose Instrumentation Octal 14-Bit, Parallel Input, Voltage-Output DAC AD7841 GENERAL DESCRIPTION The AD7841 contains eight 14-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 AD7841 accepts 14-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 AD7841 is available in a 44-lead MQFP package. FUNCTIONAL BLOCK DIAGRAM VCC VSS VDD VREF(+) AB VREF(–) AB DUTGND CD DUTGND AB AD7841 14 INPUT 14 REG A INPUT 14 REG B INPUT 14 REG C INPUT 14 REG D INPUT 14 REG E INPUT 14 REG F INPUT 14 REG G INPUT 14 REG H DAC 14 REG A DAC REG B 14 DAC B DAC A R R VOUTA R R DB13 14 VOUTB R DB0 14 DAC REG C DAC REG D DAC REG E DAC REG F 14 DAC C R 14 ADDRESS DECODE 14 DAC D R VOUTC R WR CS A0 A1 A2 LDAC 14 14 DAC F VOUTD 14 14 DAC ...