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AD7984BCPZ-RL7 Datasheet(PDF) 5 Page - Analog Devices |
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AD7984BCPZ-RL7 Datasheet(HTML) 5 Page - Analog Devices |
5 / 24 page AD7984 Rev. 0 | Page 5 of 24 TIMING SPECIFICATIONS TA = −40°C to +85°C, VDD = 2.37 V to 2.63 V, VIO = 2.3 V to 5.5 V, unless otherwise noted.1 Table 4. Parameter Symbol Min Typ Max Unit Conversion Time: CNV Rising Edge to Data Available tCONV 300 500 ns Acquisition Time tACQ 250 ns Time Between Conversions tCYC 750 ns CNV Pulse Width (CS Mode) tCNVH 10 ns SCK Period (CS Mode) tSCK 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) tSCK 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 tSCKL 4.5 ns SCK High Time tSCKH 4.5 ns SCK Falling Edge to Data Remains Valid tHSDO 3 ns SCK Falling Edge to Data Valid Delay tDSDO 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 Mode) tEN 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 Mode) tDIS 20 ns SDI Valid Setup Time from CNV Rising Edge tSSDICNV 5 ns SDI Valid Hold Time from CNV Rising Edge (CS Mode) tHSDICNV 2 ns SDI Valid Hold Time from CNV Rising Edge (Chain Mode) tHSDICNV 0 ns SCK Valid Setup Time from CNV Rising Edge (Chain Mode) tSSCKCNV 5 ns SCK Valid Hold Time from CNV Rising Edge (Chain Mode) tHSCKCNV 5 ns SDI Valid Setup Time from SCK Falling Edge (Chain Mode) tSSDISCK 2 ns SDI Valid Hold Time from SCK Falling Edge (Chain Mode) tHSDISCK 3 ns SDI High to SDO High (Chain Mode with Busy Indicator) tDSDOSDI 15 ns 1 See Figure 2 and Figure 3 for load conditions. 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 |
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