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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7944BCPZ датащи(PDF) 5 Page - Analog Devices |
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AD7944BCPZ датащи(HTML) 5 Page - Analog Devices |
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5 / 28 page  AD7944 Rev. 0 | Page 5 of 28 TIMING SPECIFICATIONS AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, VREF = 4.096 V, TA = −40°C to +85°C, unless otherwise noted.1 Table 4. Parameter Symbol Test Conditions/Comments Min Typ Max Unit Conversion Time: CNV Rising Edge to Data Available tCONV Turbo mode 320 ns tCONV Normal mode 420 ns Acquisition Time tACQ 80 ns Time Between Conversions tCYC Turbo mode 400 ns tCYC Normal mode 500 ns CNV Pulse Width tCNVH CS mode 10 ns Data Read During Conversion tDATA Turbo mode 190 ns tDATA Normal mode 290 ns Quiet Time During Acquisition from Last SCK Falling Edge to CNV Rising Edge tQUIET 20 ns SCK Period tSCK CS mode 9 ns tSCK Chain mode 11 ns SCK Low Time tSCKL 3.5 ns SCK High Time tSCKH 3.5 ns SCK Falling Edge to Data Remains Valid tHSDO 2 ns SCK Falling Edge to Data Valid Delay tDSDO 4 ns CNV or SDI Low to SDO D13 MSB Valid tEN 5 ns CNV or SDI High or Last SCK Falling Edge to SDO High Impedance tDIS CS mode 8 ns SDI Valid Setup Time from CNV Rising Edge tSSDICNV 4 ns SDI Valid Hold Time from CNV Rising Edge tHSDICNV CS mode 0 ns tHSDICNV Chain mode 0 ns SCK Valid Setup Time from CNV Rising Edge tSSCKCNV Chain mode 5 ns SCK Valid Hold Time from CNV Rising Edge tHSCKCNV Chain mode 5 ns SDI Valid Setup Time from SCK Falling Edge tSSDISCK Chain mode 2 ns SDI Valid Hold Time from SCK Falling Edge tHSDISCK Chain mode 3 ns SDI High to SDO High tDSDOSDI Chain mode with busy indicator 15 ns 1 See Figure 2 and Figure 3 for load conditions. 500µA IOL 1.4V TO SDO CL 500µA IOH 20pF 90% VIO 10% VIO VIH1 VIL1 VIL1 VIH1 tDELAY tDELAY 1MINIMUM VIH AND MAXIMUM VIL USED. SEE DIGITAL INPUTS Figure 2. Load Circuit for Digital Interface Timing SPECIFICATIONS IN TABLE 3. Figure 3. Voltage Levels for Timing |
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