AD1674KNZ

The AD1674KNZ is one member of the AD1674 series.The AD1674 is a complete, multipurpose, 12-bit analog-to-digital converter, consisting of a user-transparent onboard sample-and-hold amplifier (SHA), 10 volt reference, clock and three-state output buffers for microprocessor interface.

Features of the AD1674 are:(1)complete monolithic 12-bit 10s sampling ADC;(2)on-board sample-and-hold amplifier;(3)industry standard pinout;(4)8- and 16-bit microprocessor interface;(5)unipolar and bipolar inputs;(6)commercial, industrial and military temperature range grades.The AD1674 is pin compatible with the industry standard AD574A and AD674A, but includes a sampling function while delivering a faster conversion rate. The on-chip SHA has a wide input bandwidth supporting 12-bit accuracy over the full Nyquist bandwidth of the converter.The AD1674 design is implemented using Analog Devices'BiMOS II process allowing high performance bipolar analog circuitry to be combined on the same die with digital CMOS logic.

The absolute maximum ratings of the AD1674 can be summarized as:(1)VCC to digital common:0 to + 16.5 V;(2)VEE to digital common:0 to 16.5 V;(3)analog common to digital common:±1 V;(4)junction temperature : +175.Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.  This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied.  Exposure to absolute maximum rating conditions for extended periods may affect device reliability.A specification which guarantees no missing codes requires that every code combination appear in a monotonic increasing sequence as the analog input level is increased. Thus every code must have a finite width. The AD1674 guarantees no missing codes to 12-bit resolution; all 4096 codes are present over the entire operating range.THD is the ratio of the rms sum of the first six harmonic components to the rms value of a full-scale input signal and is expressed as a percentage or in decibels. For input signals or harmonics that are above the Nyquist frequency, the aliased component is used.