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AD7940 Fiches technique(PDF) 5 Page - Analog Devices |
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AD7940 Fiches technique(HTML) 5 Page - Analog Devices |
5 / 12 page AD7980-EP Rev. 0 | Page 5 of 12 TIMING SPECIFICATIONS −55°C to +125°C, VDD = 2.37 V to 2.63 V, VIO = 3.3 V to 5.5 V, unless otherwise stated. See Figure 2 and Figure 3 for load conditions. Table 4. Parameter Symbol Min Typ Max Unit Conversion Time: CNV Rising Edge to Data Available t CONV 500 710 ns Acquisition Time t ACQ 290 ns Time Between Conversions t CYC 1000 ns CNV Pulse Width (CS t CNVH Mode) 10 ns SCK Period (CS t SCK Mode) ns VIO Above 4.5 V 10.5 ns VIO Above 3 V 12 ns VIO Above 2.7 V 13 ns VIO Above 2.3 V 15 ns SCK Period (Chain Mode) t SCK ns VIO Above 4.5 V 11.5 ns VIO Above 3 V 13 ns VIO Above 2.7 V 14 ns VIO Above 2.3 V 16 ns SCK Low Time t SCKL 4.5 ns SCK High Time t SCKH 4.5 ns SCK Falling Edge to Data Remains Valid t HSDO 3 ns SCK Falling Edge to Data Valid Delay t DSDO VIO Above 4.5 V 9.5 ns VIO Above 3 V 11 ns VIO Above 2.7 V 12 ns VIO Above 2.3 V 14 ns CNV or SDI Low to SDO D15 MSB Valid (CS t EN Mode) VIO Above 3 V 10 ns VIO Above 2.3 V 15 ns CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS t DIS Mode) 20 ns SDI Valid Setup Time from CNV Rising Edge t SSDICNV 5 ns SDI Valid Hold Time from CNV Rising Edge (CS t HSDICNV Mode) 2 ns SDI Valid Hold Time from CNV Rising Edge (Chain Mode) t HSDICNV 0 ns SCK Valid Setup Time from CNV Rising Edge (Chain Mode) t SSCKCNV 5 ns SCK Valid Hold Time from CNV Rising Edge (Chain Mode) t HSCKCNV 5 ns SDI Valid Setup Time from SCK Falling Edge (Chain Mode) t SSDISCK 2 ns SDI Valid Hold Time from SCK Falling Edge (Chain Mode) t HSDISCK 3 ns SDI High to SDO High (Chain Mode with Busy Indicator) t DSDOSDI 15 ns 500µA IOL 500µA IOH 1.4V TO SDO CL 20pF Figure 2. Load Circuit for Digital Interface Timing X% VIO1 Y% VIO1 VIH2 VIL2 VIL2 VIH2 tDELAY tDELAY 1FOR VIO ≤ 3.0V, X = 90 AND Y = 10; FOR VIO > 3.0V X = 70, AND Y = 30. 2MINIMUM VIH AND MAXIMUM VIL USED. SEE DIGITAL INPUTS SPECIFICATIONS IN TABLE 3. Figure 3. Voltage Levels for Timing |
Numéro de pièce similaire - AD7940 |
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Description similaire - AD7940 |
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