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ADAS1000-22 Datasheet(PDF) 10 Page - Analog Devices |
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ADAS1000-22 Datasheet(HTML) 10 Page - Analog Devices |
10 / 80 page ADAS1000/ADAS1000-1/ADAS1000-2 Data Sheet Rev. A | Page 10 of 80 TIMING CHARACTERISTICS Standard Serial Interface AVDD = 3.3 V ± 5%, IOVDD = 1.65 V to 3.6 V, AGND = DGND = 0 V, REFIN tied to REFOUT, externally supplied crystal/clock = 8.192 MHz. TA = −40°C to +85°C, unless otherwise noted. Typical specifications are mean values at TA = 25°C. Table 5. IOVDD Parameter1 3.3 V 2.5 V 1.8 V Unit Description Output Rate2 2 128 kHz Across specified IOVDD supply range; three programmable output data rates available as configured in FRMCTL register (see Table 35) 2 kHz, 16 kHz, 128 kHz; use skip mode for slower rates SCLK Cycle Time 25 40 50 ns min See Table 19 for details on SCLK vs. packet data rates tCSSA 8.5 9.5 12 ns min CS valid setup time to rising SCLK tCSHA 3 3 3 ns min CS valid hold time to rising SCLK tCH 8 8 8 ns min SCLK high time tCL 8 8 8 ns min SCLK low time tDO 8.5 11.5 20 ns typ SCLK falling edge to SDO valid delay; SDO capacitance of 15 pF 11 19 24 ns max tDS 2 2 2 ns min SDI valid setup time from SCLK rising edge tDH 2 2 2 ns min SDI valid hold time from SCLK rising edge tCSSD 2 2 2 ns min CS valid setup time from SCLK rising edge tCSHD 2 2 2 ns min CS valid hold time from SCLK rising edge tCSW 25 40 50 ns min CS high time between writes (if used). Note that CS is an optional input, it may be tied permanently low. See a full description in the Serial Interfaces section. tDRDY_CS2 0 0 0 ns min DRDY to CS setup time tCSO 6 7 9 ns typ Delay from CS assert to SDO active RESET Low Time2 20 20 20 ns min Minimum pulse width; RESET is edge triggered 1 Guaranteed by characterization, not production tested. 2 Guaranteed by design, not production tested. Figure 2. Data Read and Write Timing Diagram (CPHA = 1, CPOL = 1) DB[30] DB[31] DB[0] DB[1] DB[29] DB[25] DB[24] DB[23] SCLK CS SDI tCH tCL tCSSA tCSHA tCSHD tCSSD tDH tDS tCSW SDO tDO R/W MSB LSB DATA ADDRESS DO_25LAST DO_1LAST DO_0LAST DO_29LAST DO_30LAST DO_31LAST DRDV MSB LSB tCSO |
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Descripción similar - ADAS1000-22 |
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