The AD669 DACPORT® is a complete 16-bit single-chip digital-to-analog converter with an on-chip reference and output amplifier. It is manufactured using Analog Devices' BiMOS II process and enables high-precision bipolar linear circuitry with low-power CMOS logic on the same chip. The AD669 chip has a built-in current switch, decoding logic, an output amplifier, an embedded Zener reference, and multiple dual-buffer latches.
The device's architecture ensures 15-bit monotonicity over the entire temperature range. The integral nonlinearity is maintained at ±0.003%, and the maximum differential nonlinearity is ±0.003%. The on-chip output amplifier enables voltage outputs to be within 1/2 LSB of accuracy (full-scale stepping) at 10 μs.
Data is loaded into the AD669 in parallel 16-bit format. The dual-buffer latching structure not only eliminates data skew errors, but also enables simultaneous updates of DACs in multi-DAC systems. Three TTL/LSTTL/5 V CMOS compatible signals control the following latches: CS, L1, and LDAC.
The output range of the AD669 can be programmed by pin to a 0 V to 10 V unipolar output range or a -10 V to +10 V bipolar output range.
AD669 is divided into seven levels. The AN and BN grades are rated for a temperature range of -40°C to +85°C and are available in a 28-pin plastic DIP package. The AR and BR stages are also rated for a temperature range of -40°C to +85°C and are available in a 28-pin SOIC package. The SQ grade is rated for a temperature range of -55°C to +125°C and is available in a 28-pin sealed cerdip package. The AD669 is also available in MIL-STD-883 compliant models. Please refer to the AD669/883B datasheet for relevant technical specifications and test conditions.