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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7779ACPZ датащи(PDF) 13 Page - Analog Devices |
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AD7779ACPZ датащи(HTML) 13 Page - Analog Devices |
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13 / 101 page  AD7779 Data Sheet Rev. A | Page 12 of 100 SYNCHRONIZATION PINS AND RESET TIMING CHARACTERISTICS AVDD1x/AVSSx = ±1.65 V, 3.3 V/AGND, AVDD2 − AVSSx = 2.2 V to 3.6 V; IOVDD = 1.8 V to 3.6 V; DGND = 0 V, REFx+/REFx− = 2.5 V (internal/external), MCLK = 8192 kHz; all specifications at TMIN to TMAX, unless otherwise noted. Table 4. Parameter Description1 Test Conditions/Comments Min Typ Max Unit t26 START setup time 10 ns t27 START hold time MCLK ns t28 MCLK falling edge to SYNC_OUT falling edge MCLK ns t29 SYNC_IN setup time 10 ns t30 SYNC_IN hold time MCLK ns tINIT_ SYNC_IN SYNC_IN rising edge to first DRDY 16 kSPS, HR mode 145 µs tINIT_ RESET RESET rising edge to first DRDY 16 kSPS, HR mode 225 µs t31 RESET hold time 2 × MCLK ns tPOWER_UP Start time tPOWER_UP is not shown in Figure 4 2 ms 1 All input signals are specified with tR = tF = 1 ns/V (10% to 90% of IOVDD) and timed from a voltage level of (VIL + VIH)/2. MCLK START SYNC_OUT SYNC_IN DRDY RESET t26 t27 t28 t29 tINIT_SYNC_IN t31 tINIT_RESET t30 Figure 4. Synchronization Pins and Reset Control Interface Timing Diagram |
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