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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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REF200 датащи(PDF) 9 Page - Burr-Brown (TI) |
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REF200 датащи(HTML) 9 Page - Burr-Brown (TI) |
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9 / 17 page  ® REF200 9 R 100µA Reference –V 100µA S R 2 0.01µF R (N • R ) 2 1 I = N • 100µA OUT (1) R (N • R ) 2 1 I = N • 100µA OUT (1) 100µA 0.01µF R 2 +V S +V 100µA S OPA602 0.01µF NR I = (N +1) 100µA O R 0.01µF NR I = (N +1) 100µA O R 100µA OPA602 0.01µF NR I = (N +1) 100µA O 10pF (a) (b) (d) (c) (e) –V S OPA602 RNR I OUT 1k Ω 4k Ω 500 µA 1k Ω 9k Ω 1mA 100k Ω 9.9k Ω 10mA EXAMPLES FEATURES: (1) Zero volts shunt compliance. (2) Adjustable only to values above reference value. NOTE: Current source/sink swing to the “Load Return” rail is limited only by the op amp's input common mode range and output swing capability. Voltage drop across “R” can be tailored for any amplifier to allow swing to zero volts from rail. NOTE: (1) Burr Brown® OPA602 or OPA128 EXAMPLES R 1 R 2 I OUT 100 Ω 10M Ω 1nA 10k Ω 1M Ω 1 µA 10k Ω 1k Ω 1mA Use OPA128 I O = 100µA (N + 1). Compliance ≈ 3.5V with 0.1V across R. Max I O limited by FET. For I O = 1A, R = 0.1Ω, NR = 1kΩ. FIGURE 10. Adjustable Current Sources. |
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