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ADM485AQ Datasheet(PDF) 4 Page - Analog Devices |
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ADM485AQ Datasheet(HTML) 4 Page - Analog Devices |
4 / 8 page ![]() ADM485 REV. A –4– Test Circuits R R V OC V OD Figure 1. Driver Voltage Measurement Test Circuit 375 Ω V OD3 V TST 375 Ω 60 Ω Figure 2. Driver Voltage Measurement Test Circuit 2 A B R LDIFF C L1 C L2 Figure 3. Driver Propagation Delay Test Circuit V OUT C L A B V CC S2 R L S1 0V OR 3V DE IN DE Figure 4. Driver Enable/Disable Test Circuit C L V OUT RE A B Figure 5. Receiver Propagation Delay Test Circuit V OUT V CC S2 R L S1 RE IN RE C L +1.5V –1.5V Figure 6. Receiver Enable/Disable Test Circuit T PLH T PHL 0V 0V 1.5V 1.5V A–B RO V OL V OH Figure 9. Receiver Propagation Delay T ZH 1.5V 1.5V 3V 0V 1.5V T HZ V OH V OH – 0.5V 0V R V OL + 0.5V T ZL 1.5V T LZ V OL R RE O/P LOW O/P HIGH Figure 10. Receiver Enable/Disable Timing Switching Characteristics –VO VO 1/2VO 0V 3V 1.5V 1.5V T PLH T SKEW VO 0V 90% POINT 10% POINT 90% POINT 10% POINT T PHL B A T SKEW T R T F Figure 7. Driver Propagation Delay, Rise/Fall Timing T ZH 1.5V DE 1.5V 3V 0V 2.3V T HZ V OH V OH – 0.5V 0V A, B V OL + 0.5V T ZL 2.3V T LZ V OL A, B Figure 8. Driver Enable/Disable Timing |