AD1674BD 12-Bit 100 kSPS Complete ADC IC with Sample-and-Hold
AD1674BD Data Converter IC ADC 12-Bit 100 kSPS Complete IC
PRODUCT DESCRIPTION
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.
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 is fully specified for ac parameters (such as S/(N+D) ratio, THD, and IMD) and dc parameters (offset, full-scale error, etc.). With both ac and dc specifications, the AD1674 is ideal for use in signal processing and traditional dc measure- ment applications.
The AD1674 design is implemented using Analog Devices’ BiMOS II process allowing high performance bipolar analog cir- cuitry to be combined on the same die with digital CMOS logic.
Five different temperature grades are available. The AD1674J and K grades are specified for operation over the 0°C to +70°C temperature range. The A and B grades are specified from –40°C to +85°C; the AD1674T grade is specified from –55°C to +125°C. The J and K grades are available in both 28-lead plastic DIP and SOIC. The A and B grade devices are available in 28-lead hermetically sealed ceramic DIP and 28-lead SOIC. The T grade is available in 28-lead hermetically sealed ceramic DIP.
PRODUCT HIGHLIGHTS
1. Industry Standard Pinout: The AD1674 utilizes the pinout established by the industry standard AD574A and AD674A.
2. Integrated SHA: The AD1674 has an integrated SHA which supports the full Nyquist bandwidth of the converter. The SHA function is transparent to the user; no wait-states are needed for SHA acquisition.
3. DC and AC Specified: In addition to traditional dc specifica- tions, the AD1674 is also fully specified for frequency do- main ac parameters such as total harmonic distortion, signal-to-noise ratio and input bandwidth. These parameters can be tested and guaranteed as a result of the onboard SHA.
4. Analog Operation: The precision, laser-trimmed scaling and bipolar offset resistors provide four calibrated ranges: 0Vto+10Vand0Vto+20Vunipolar,–5Vto+5Vand –10 V to +10 V bipolar. The AD1674 operates on +5 V and ± 12 V or ± 15 V power supplies.
5. Flexible Digital Interface: On-chip multiple-mode three-state output buffers and interface logic allow direct connection to most microprocessors.
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