AD674 AD [Analog Devices], AD674 Datasheet
AD674
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AD674 Summary of contents
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... Analog Operation: The precision, laser-trimmed scaling and bipolar offset resistors provide four calibrated ranges and unipolar; – and – +10 V bipolar. The AD674B and AD774B operate and ± ± power supplies. 3. Flexible Digital Interface: On-chip multiple-mode three-state output buffers and interface logic allow direct connection to most microprocessors ...
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... AD674B/AD774B–SPECIFICATIONS 10 –15 V 10% or –12 V LOGIC EE Model (AD674B or AD774B) Min Typ Max Min Typ Max RESOLUTION LINEARITY ERROR @ 25° MIN MAX DIFFERENTIAL LINEARITY ERROR (Minimum Resolution for Which No Missing Codes are Guaranteed UNIPOLAR OFFSET @ 25°C 1 BIPOLAR OFFSET @ 25° ...
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... OZ SWITCHING SPECIFICATIONS CONVERTER START TIMING (Figure Grades Parameter Symbol Min Typ Max Min Typ Max Unit Conversion Time 8-Bit Cycle (AD674B 12-Bit Cycle (AD674B 8-Bit Cycle (AD774B 12-Bit Cycle (AD774B 7.3 C STS Delay from CE ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD674B/AD774B features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... Thus every code must have a finite width. The AD674B and AD774B guarantee no missing codes to 12-bit resolution, requiring that all 4096 codes must be present over the entire operating temperature ranges. ...
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... LOW single 12-bit word (12/8 HIGH). Types Analog Input Analog Output Digital Input Digital Output Power PIN CONFIGURATION V STS 1 28 LOGIC DB11 (MSB) 12 DB10 DB9 AD674B 5 DB8 R AD774B DB7 DB6 CC TOP VIEW (Not to Scale) REF OUT 8 21 ...
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... AD711 sample-hold amplifier is required, the monolithic AD585 or AD781 is recommended, with the output buffer driving the AD674B or AD774B input directly. A better alternative is the AD1674, which µs sampling ADC in the same pinout as the AD574A, AD674A, or AD774B and is functionally equivalent. ...
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... UNIPOLAR CALIBRATION The connections for unipolar ranges are shown in Figure 7. The AD674B or AD774B is trimmed to a nominal 1/2 LSB offset so that the exact analog input for a given code will be in the middle of that code (halfway between the transitions to the codes above and below it) ...
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... R 12/8 CONTROL LOGIC The AD674B and AD774B contain on-chip logic to provide conversion initiation and data read operations from signals commonly available in microprocessor systems; this internal logic circuitry is shown in Figure 9. The control signals CE, CS, and R/C control the operation of the converter. The state of R/C when CE and CS are both asserted determines whether a data read (R convert (R progress ...
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... The AD674B and AD774B include internal logic to permit direct interface to 8-bit and 16-bit data buses, selected by the 12/8 input. In 16-bit bus applications (12/8 high) the data lines (DB11 through DB0) may be connected to either the 12 most significant or 12 least significant bits of the data bus ...
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... Wide Body SOIC Package (R-28) 0.7125 (18.10) 0.6969 (17.70 0.2992 (7.60) 0.2914 (7.40 PIN 1 0.1043 (2.65) 0.0926 (2.35) 0.0500 0.0192 (0.49) SEATING 0.0118 (0.30) 0.0125 (0.32) (1.27) PLANE 0.0138 (0.35) 0.0040 (0.10) 0.0091 (0.23) BSC AD674B/AD774B 0.05 (1.27) 0.045 (1.14) o 0.08 (2.0) 30 0.125 MIN (3.17) SEATING PLANE + – 0.145 0.02 (3.68) + 0.010 0.002 – + – (0.254 0.05) 0.050 + 0.010 – ...
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... AD674B/AD774B Revision History Location Data Sheet changed from REV REV. C. Edits to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Add 28-Lead Wide Body SOIC Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Page ...