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MAX4850ETE Arkusz danych(PDF) 12 Page - Maxim Integrated Products |
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MAX4850ETE Arkusz danych(HTML) 12 Page - Maxim Integrated Products |
12 / 16 page Dual SPDT Analog Switches with Over-Rail Signal Handling 12 ______________________________________________________________________________________ Test Circuits/Timing Diagrams tR < 20ns tF < 20ns 50% LOGIC INPUT RL COM_ GND IN_ CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VNO ( RL ) RL + RON VNO tOFF 0V NO_ 0.9 x V0UT 0.9 x VOUT tON VOUT SWITCH OUTPUT LOGIC INPUT IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. VCC CL VCC VOUT MAX4850_ MAX4852_ VCC 0V SWITCH INPUT NORMAL MODE NORMAL MODE HIGH-Z MODE VCC + 0.5V tHIZ tHIZB Figure 1. Switching Time tskew_i 90% 50% 10% 90% 50% 10% tfi INPUT A INPUT A- tri tskew_o 90% 50% 10% 90% 50% 10% tfo OUTPUT B OUTPUT B- tro B- CL A- Rs A B CL TxD+ TxD- Rs Rs = 39 Ω CL = 50pF DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS. DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS. CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS. CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS. |tskew_i| |tskew_o| |tfo - tfi| |tro - tri| Figure 2. Input/Output Skew Timing Diagram |
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