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AD6676 Datasheet(PDF) 8 Page - Analog Devices |
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AD6676 Datasheet(HTML) 8 Page - Analog Devices |
8 / 90 page AD6676 Data Sheet Rev. A | Page 8 of 90 CLK± TO SYSREF± TIMING DIAGRAM CLK+ CLK– SYSREF+ SYSREF– tSU_SR tH_SR Figure 2. SERDES CLK+ to SYSREF+ Timing DIGITAL CMOS INPUT/OUTPUT SPECIFICATIONS VDD1 = VDDL = VDDC = VDDQ = VDDD = VDDHSI = 1.1 V, VDD2 = 2.5 V, VDDIO = 1.8 V, unless otherwise noted. Table 3. Parameter Symbol Test Conditions/Comments Min Typ Max Unit CMOS INPUT/OUTPUT LEVELS Input Voltage High V IH VDDIO × 0.65 V Input Voltage Low V IL VDDIO × 0.35 V Output Voltage High V OH SDIO/SDO I OH = 3 mA VDDIO × 0.7 V AGCx I OH = 0.5 mA VDDIO × 0.7 V Output Voltage Low V OL SDIO/SDO I OL = 3 mA 0.4 V AGCx V OL I OL = 0.5 mA 0.4 V Input Capacitance 1 pF SPI TIMING See Figure 148, Figure 149, and Figure 150 SCLK Frequency f SCLK 25 MHz SCLK Period t SCLK 40 ns SCLK Pulse Width High t HIGH 10 ns SCLK Pulse Width Low t LOW 10 ns SDIO Setup Time t DS 2 ns SDIO Hold Time t DH 2 ns SPI_RESET Setup Time1 t SPI_RST Not shown in Figure 148 to Figure 150 2 ms SCLK Falling Edge to SDO Valid Propagation Delay t ACCESS 10 ns CSB Rising Edge to SDIO High-Z t Z 10 ns CSB Fall to SCLK Rise Setup Time t S 2 ns SCLK Fall to CSB Rise Hold Time t H 2 ns 1 This is the time required after a software or hardware reset until SPI access is available again. |
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