поискавой системы для электроныых деталей |
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AD817 датащи(PDF) 10 Page - Analog Devices |
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AD817 датащи(HTML) 10 Page - Analog Devices |
10 / 12 page REV. B –10– AD817 OFFSET NULLING The input offset voltage of the AD817 is inherently very low. However, if additional nulling is required, the circuit shown in Figure 32 can be used. The null range of the AD817 in this con- figuration is ±15 mV. AD817 SETTLING TIME Settling time is comprised primarily of two regions. The first is the slew time in which the amplifier is overdriven, where the output voltage rate of change is at its maximum. The second is the linear time period required for the amplifier to settle to within a specified percent of the final value. 0.10 0.20 0.15 0.05 0.05 0 0 4 6 10 8 2 0 350 400 300 250 200 150 100 50 Figure 33. Settling Time in ns 0 V to +10 V Measuring the rapid settling time of AD817 (45 ns to 0.1% and 70 ns to 0.01%–10 V step) requires applying an input pulse with a very fast edge and an extremely flat top. With the AD817 con- figured in a gain of –1, a clamped false summing junction re- sponds when the output error is within the sum of two diode voltages (ª1 volt). The signal is then amplified 20 times by a clamped amplifier whose output is connected directly to a sam- pling oscilloscope. Figures 33 and 34 show the settling time of the AD817, with a 10 volt step applied. 0.05 0.05 0 0.20 0.10 0.15 –10 –6 –4 0 –2 –8 0 350 400 300 250 200 150 100 50 Figure 34. Settling Time in ns 0 V to –10 V AD829 100 Ω 0.47 µF 0.01 µF +V S 0.47 µF 0.01 µF –V S SHORT, DIRECT CONNECTION TO TEKTRONIX TYPE 11402 OSCILLOSCOPE PREAMP INPUT SECTION SETTLING OUTPUT 2 × HP2835 ERROR AMPLIFIER V ERROR OUTPUT × 10 2 × HP2835 1.9k Ω 100 Ω AD817 0.01 µF +V S 0.01 µF 2.2 µF –V S 2.2 µF 10pF SCOPE PROBE CAPACITANCE TEKTRONIX P6201 FET PROBE TO TEKTRONIX TYPE 11402 OSCILLOSCOPE PREAMP INPUT SECTION 500 Ω 5–18pF DEVICE UNDER TEST NOTE: USE CIRCUIT BOARD WITH GROUND PLANE FALSE SUMMING NODE NULL ADJUST 1k Ω 100 Ω 1k Ω 50 Ω COAX CABLE TTL LEVEL SIGNAL GENERATOR 50Hz OUTPUT 7, 8 0 TO ±10V POWER SUPPLY EI&S DL1A05GM MERCURY RELAY ERROR SIGNAL OUTPUT 500 Ω 50 Ω 6 3 2 4 15pF 1M Ω 7 6 3 2 4 5 13 2 1, 14 DIGITAL GROUND ANALOG GROUND 7 Figure 35. Settling Time Test Circuit |
Аналогичный номер детали - AD817_15 |
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Аналогичное описание - AD817_15 |
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