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ADA4254ACPZ-R7 データシート(PDF) 8 Page - Analog Devices |
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ADA4254ACPZ-R7 データシート(HTML) 8 Page - Analog Devices |
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8 / 59 page ![]() ADA4254 Data Sheet Rev. B | Page 8 of 59 TIMING SPECIFICATIONS VDDH = 28 V, VSSH = −28 V, AVDD = 5 V, AVSS = 0 V, DVDD = 3.3 V, DVSS = 0 V, VOCM = AVDD/2 V. Table 2. Digital Values and SPI Timing Specifications Parameter Test Conditions/Comments Min Typ Max Unit Maximum Clock Rate (SCLK) 5 MHz Minimum Pulse Width (SCLK) High tPWH 75 ns Low tPWL 75 ns SDI/SDO to SCLK Setup Time tDS 10 ns SDI/SDO to SCLK Hold Time tDH 10 ns Data Valid, SDO to SCLK tDV 50 ns Setup Time, CS to SCLK tD CS 30 ns Timing Diagrams R/W A6 A5A4 A3 A2 A1A0 D7N D6N D5N D00 D10 D20 D30 D7N D6N D5N D00 D10 D20 D30 INSTRUCTION CYCLE DATA TRANSFER CYCLE CS SCLK SDIO SDO Figure 2. SPI Timing Diagram, MSB First SCLK SDI CS INSTRUCTION BIT 6 INSTRUCTION BIT 7 tDCS tDS tDH tPWH tPWL tSCLK Figure 3. SPI Register Write Timing Diagram SCLK SDI, SDO CS DATA BITn–1 DATA BIT n tDV Figure 4. SPI Register Read Timing Diagram |
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