AD202 Analog Devices, Inc., AD202 Datasheet
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AD202
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AD202 Summary of contents
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... mA. This is sufficient to operate a low-drift input preamp, provide excitation to a semiconductor strain gage, or power any of a wide range of user-supplied ancillary circuits. The AD202 can supply ± 7 0.4 mA, which is sufficient to operate adjustment networks or low power references and op amps provide an open-input alarm. ...
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... Bandwidth 2 ISOLATED POWER OUTPUT Voltage, No Load Accuracy Current Regulation, No Load to Full Load Ripple OSCILLATOR DRIVE INPUT Input Voltage Input Frequency POWER SUPPLY (AD202 Only) Voltage, Rated Performance Voltage, Operating Current, No Load ( TEMPERATURE RANGE Rated Performance Operating Storage 4 PACKAGE DIMENSIONS ...
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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 AD202/AD204 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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... The output resistance of the isolator is typically 3 kΩ for the AD204 (7 kΩ for AD202) and varies with signal level and temperature should not be loaded (see Figure 2 for the effects of load upon nonlinearity and gain drift). In many cases, a high imped- ...
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... CLK AND used to limit current to a safe value. This is particularly impor- PWR COM tant with the AD202, which may not start if a large input current is present. Figure 7 shows how to accommodate current inputs or sum currents or voltages. This circuit can also be used when the input signal is larger than the ± ...
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... For these of F isolators, the significant resistance will normally be that in the path from the source of the common-mode signal to IN COM. The AD202 and AD204 also perform well in applications re- quiring rejection of fast common-mode steps, as described in the Applications section. 180 160 ...
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... Figure 12. Input Filter for Improved Step Response REV. D Except at the highest useful gains, the noise seen at the output G = 100 of the AD202 and AD204 will be almost entirely comprised carrier ripple at multiples of 25 kHz. The ripple is typically 2 mV p-p near zero output and increases to about 7 mV p-p for outputs of ± ...
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... MINIMUM SUPPLY VOLTAGE Figure 14. AD246 Fanout Rules Operation at Reduced Signal Swing. Although the nominal output signal swing for the AD202 and AD204 is ± there may be cases where a smaller signal range is desirable. When that is done, the fixed errors (principally offset terms and output noise) become a larger fraction of the signal, but nonlinearity is reduced ...
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... Note that the isolated supply current is large enough to mandate the use supply bypass capacitors. This circuit can be R used with an AD202 if a low power op amp is used instead of G the OP07. Process Current Input with Offset. Figure 18 shows an ...
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... U10 1k –15V Figure 19. High Compliance Current Source Motor Control Isolator. The AD202 and AD204 perform very well in applications where rejection of fast common-mode steps is important but bandwidth must not be compromised. Current sensing in a fill-wave bridge motor driver (Figure 20) is one example of this class of application. For 200 V common-mode steps (1 ms rise time) and a gain shown, the typical response at the isolator output will be spikes of ± ...
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... TYP 0.12 (3.05) NOTE: PIN 20 IS PRESENT ONLY ON AD202 CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN 0.24 (6.10) 0.30 (7.62) MAX 0.10 (2.5) DIA BOTH ENDS CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS ...
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... AD202/AD204 Revision History Location 10/02—Data Sheet changed from REV REV. D. Deleted FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Text added to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Edits to SPECIFICATIONS TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Edits to Figure Edits to Input Configurations section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Edit to High Compliance Current Source section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4/01—Data Sheet changed from REV REV. C. ...