AD669

The AD669 DACPORT^® is a complete 16-bit monolithic D/Aconverter with an on-board reference and output amplifier. It ismanufactured on Analog Devices' BiMOS II process. This pro-cess allows the fabrication of low power CMOS logic functionson the same chip as high precision bipolar linear circuitry. TheAD669 chip includes current switches, decoding logic, an outputamplifier, a buried Zener reference and double-buffered latches.

The AD669's architecture insures 15-bit monotonicity overtemperature. Integral nonlinearity is maintained at ±0.003%,while differential nonlinearity is ±0.003% max. The on-chipoutput amplifier provides a voltage output settling time of 10 sto within 1/2 LSB for a full-scale step.

Data is loaded into the AD669 in a parallel 16-bit format. Thedouble-buffered latch structure eliminates data skew errors andprovides for simultaneous updating of DACs in a multi-DACsystem. Three TTL/LSTTL/5 V CMOS compatible signals con-trol the latches: CS ,L1 and LDAC.

The output range of the AD669 is pin programmable and canbe set to provide a unipolar output range of 0 V to +10 V or abipolar output range of 10 V to +10 V.

The AD669 is available in seven grades: AN and BN versionsare specified from 40 to +85 and are packaged in a 28-pinplastic DIP. The AR and BR versions are specified for 40 to+85 operation and are packaged in a 28-pin SOIC. The SQversion is specified from 55to +125 and is packaged in ahermetic 28-pin cerdip package. TheAD669 is also availablecompliant to MIL-STD-883. Refer to the AD669/883B datasheet for specifications and test conditions.