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AD9857/PCB 数据表(PDF) 18 Page - Analog Devices |
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AD9857/PCB 数据表(HTML) 18 Page - Analog Devices |
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18 / 31 page ![]() AD9857 –18– REV. 0 Figures 25 and 26 illustrate the Data Write and Data Read operations on the AD9857 serial port: tPRE tSCLK tSCLKPWH tSCLKPWL tDSU tDHLD CS SCLK SDIO 1ST BIT 2ND BIT SYMBOL DEFINITION MIN tPRE tSCLK tDSU tSCLKPWH tSCLKPWL tDHLD CS SETUP TIME PERIOD OF SERIAL DATA CLOCK SERIAL DATA SETUP TIME SERIAL DATA CLOCK PULSEWIDTH HIGH SERIAL DATA CLOCK PULSEWIDTH LOW SERIAL DATA HOLD TIME 40ns 100ns 30ns 40ns 40ns 0ns Figure 25. Timing Diagram for Data Write to AD9857 SDO 1ST BIT 2ND BIT SDIO SYMBOL DEFINITION MAX tDV DATA VALID TIME 30ns tDV CS SCLK Figure 26. Timing Diagram for Read from AD9857 |
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