The AD669 DACPORT® is a complete 16-bit, monolithic digital-to-analog converter with an on-chip reference and output amplifier. Fabricated using Analog Devices' BiMOS II process, it enables high precision bipolar linear circuitry with low power CMOS logic functions on the same chip. The AD669 contains a current switch, decoding logic, an output amplifier, an embedded Zener reference, and double-buffered latches.
The device's architecture ensures 15-bit monotonicity over temperature. The integral nonlinearity remains at ±0.003%, and the maximum differential nonlinearity is ±0.003%. The on-chip output amplifier enables the voltage output to be accurate within 1/2 LSB (full-scale step) at 10 μs.
The data is loaded into the AD669 in parallel 16-bit format. The double-buffered latch architecture eliminates data skew errors and enables simultaneous updates of each DAC in a multiDAC system. Three TTL/LSTTL/5 V CMOS-compatible signals control the following latches: CS, L1, and LDAC.
The output range of the AD669 is pin programmable and can be set to a unipolar output range of 0 V to 10 V or a bipolar output range of -10 V to +10 V.
The AD669 is divided into seven grades. The AN and BN grades are specified over the -40°C to +85°C temperature range and are available in a 28-pin plastic DIP package. The AR and BR grades are also specified over the -40°C to +85°C temperature range and are available in a 28-pin SOIC package. The SQ grade is specified over the -55°C to +125°C temperature range and is available in a 28-pin hermetically sealed cerdip package. The AD669 is also available in MIL-STD-883 compliant versions. Refer to the AD669/883B data sheet for specifications and test conditions.