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ADM1487EARZ-REEL7 Datenblatt(PDF) 11 Page - Analog Devices |
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ADM1487EARZ-REEL7 Datenblatt(HTML) 11 Page - Analog Devices |
11 / 16 page ADM485E/ADM487E/ADM1487E Rev. 0 | Page 11 of 16 TEST CIRCUITS AND SWITCHING CHARACTERISTICS Z Y VOD VOC RL RL Figure 18. Driver DC Test Load DI DE VDD A B RL CL CL VOD Figure 19. Driver Timing Test Circuit 5V 1.5V 1/2VO 20% 80% 80% 20% DI A B 0V 0V VO VO –VO VDIFF tSKEW = tDPLH – tDPHL VDIFF = V (A) – V (B) tDR tDPLH tDPHL tDF 1/2 VO Figure 20. Driver Propagation Delays GENERATOR 0 OR 5V 50Ω RL = 500Ω OUT CL S1 1.5V 5V 0V VOH 0V 0.5V 2.3V OUT DE tDHZ tDZH, tDZH(SHDN) D Figure 21. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN)) GENERATOR 0V OR 5V 50Ω D RL = 500Ω VCC OUT CL S1 VCC/2 5V 0V 0.5V 2.3V VOL OUT VCC DE tDLZ tDZL, tDZL(SHDN) Figure 22. Driver Enable and Disable Times (tDZL, tDLZ, tDZL(SHDN)) ATE B RECEIVER OUTPUT A R VID Figure 23. Receiver Propagation Delay Test Circuit THE RISE TIME AND FALL TIME OF INPUT A AND INPUT B < 4ns +1V –1V tRPHL tRPLH 1.5V B RO VOH VOL A Figure 24. Receiver Propagation Delays |
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Ähnliche Beschreibung - ADM1487EARZ-REEL7 |
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