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ADM3485EAR Arkusz danych(PDF) 7 Page - Analog Devices |
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ADM3485EAR Arkusz danych(HTML) 7 Page - Analog Devices |
7 / 16 page ADM3485E Rev. D | Page 7 of 16 TEST CIRCUITS AND SWITCHING CHARACTERISTICS VOC RL/2 RL/2 B A VOD Figure 3. Driver Differential Output Voltage and Common-Mode Output Voltage RL 375 Ω 375 Ω VOD VCM = –7V TO +12V D VCC Figure 4. Driver Differential Output Voltage with Varying Common-Mode Voltage VOH IOH (–) VID R 0 IOL (+) VOL Figure 5. Receiver Output Voltage High and Output Voltage Low IN OUT +1.5V +1.5V +3V 0V ≈ +2V ≈ –2V tDD tDD tTD tTD 50% 50% 10% 10% 90% 90% D GENERATOR1 VCC 50 Ω CL RL = 60 Ω CL = 15pF2 OUT 1PPR = 250kHz, 50% DUTY CYCLE, tR ≤ 6.0ns, ZO = 50Ω. 2CL INCLUDES PROBE AND STRAY CAPACITANCE. Figure 6. Driver Differential Output Delay and Transition Times 3V 0V VOH VOL VOH VOL VOM VOM VOM VOM IN A OUT B OUT 1.5V 1.5V tPLH tPHL tPHL tPLH D VOM RL = 27Ω OUT CL = 15pF2 GENERATOR1 VCC 50 Ω S1 VOM = VOH + VOL 2 ≈ 1.5V 1PPR = 250kHz, 50% DUTY CYCLE, tR ≤ 6.0ns, ZO = 50Ω. 2CL INCLUDES PROBE AND STRAY CAPACITANCE. Figure 7. Driver Propagation Delays D OUT CL = 50pF2 GENERATOR1 50 Ω S1 VOM = VOH + VOL 2 ≈ 1.5V RL = 110Ω 0V OR 3V 1PPR = 250kHz, 50% DUTY CYCLE, tR ≤ 6.0ns, ZO = 50Ω. 2CL INCLUDES PROBE AND STRAY CAPACITANCE. 0V VOH 0V 3V 1.5V 1.5V 0.25V IN OUT VOM tPZH tPHZ Figure 8. Driver Enable and Disable Times (tPZH, tPSH, tPHZ) |
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