AD760AQ

Product Summary

The AD760AQ is a complete 16/18-bit self-calibrating monolithic DAC (DACPORT with onboard voltage reference, double buffered latches and output amplifier. It is manufactured on Analog Devices BiMOS II process. This process of the AD760AQ allows the fabrication of low power CMOS logic functions on the same chip as high precision bipolar linear circuitry. Self-calibration is initiated by simply pulsing the CAL pin low. The CALOK pin of the AD760AQ indicates when calibration has been successfully completed. The output multiplexer (MUXOUT) can be used to send the output to the bottom of the output range during calibration. Data can be loaded into the AD760AQ as straight binary, serial data or as two 8-bit bytes. In serial mode, 16-bit or 18-bit data can be used and the serial mode input format is pin selectable, to be MSB or LSB first. This is made possible by three digital input pins which have dual functions (Pins 12, 13, and 14). In byte mode of the AD760AQ the user can similarly define whether the high byte or low byte is loaded first. The serial output (SOUT) pin allows the user to daisy chain several AD760AQs by shifting the data through the input latch into the next DAC thus minimizing the number of control lines required in a multiple DAC application. The double buffered latch structure of the AD760AQ eliminates data skew errors and provides for simultaneous updating of DACs in a multi-DAC system.

Parametrics

AD760AQ absolute maximum ratings: (1)VCC to AGND: –0.3 V to +17.0 V; (2)VEE to AGND: +0.3 V to –17.0 V; (3)VLL to DGND: –0.3 V to +7 V; (4)AGND to DGND: ±1 V; (5)Digital Inputs (Pins 2, 7–14, and 16–21) to DGND: –1.0 V to +7.0 V; (6)REF IN to AGND: ±10.5 V; (7)Span/Bipolar Offset to AGND: ±10.5 V; (8)REF OUT, VOUT, MUXOUT, MUXIN: Indefinite Short to; (9)AGND, DGND, VCC, VEE, and VLL; (10)qJA, Thermal Impedance: 50℃/W; (11)Junction Temperature: 175℃; (12)Storage Temperature: –65℃ to +150℃; (13)Lead Temperature (Soldering, 10 sec): +300℃.

Features

AD760AQ features: (1)±0.2 LSB (±0.00031%) Typ Peak DNL and INL; (2)±0.5 LSB (±0.00076%) Typ Unipolar Offset, Bipolar Zero; (3)17-Bit Monotonicity Guaranteed; (4)18-Bit Resolution (in Serial Mode); (5)Complete 16/18-Bit D/A Function. On-Chip Output Amplifier. On-Chip Buried Zener Voltage Reference; (6)Microprocessor Compatible. Serial or Byte Input. Double Buffered Latches; (7)Asynchronous Clear Function; (8)Serial Output Pin Facilitates Daisy Chaining; (9)Pin Strappable Unipolar or Bipolar Output; (10)Low THD+N: 0.005%; (11)MUX Output Control on Power-Up and Supply Glitches.

Diagrams