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ADIS1644X/FLEX Datasheet(PDF) 5 Page - Analog Devices |
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ADIS1644X/FLEX Datasheet(HTML) 5 Page - Analog Devices |
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5 / 23 page ![]() Data Sheet ADIS16446 Rev. 0 | Page 5 of 23 TIMING SPECIFICATIONS TA = 25°C and VDD = 3.3 V, unless otherwise noted. Table 2. Parameter Description Normal Mode Burst Read Unit Min1 Typ Max Min1 Typ Max fSCLK Serial clock 0.01 2.0 0.01 1.0 MHz tSTALL Stall period between data 20 N/A2 μs tREADRATE Read rate 40 μs t CS Chip select to SCLK edge 48.8 48.8 ns tDAV DOUT valid after SCLK edge 100 100 ns tDSU DIN setup time before SCLK rising edge 24.4 24.4 ns tDHD DIN hold time after SCLK rising edge 48.8 48.8 ns tSCLKR, tSCLKF SCLK rise and fall times, not shown in the Timing Diagrams section 5 12.5 5 12.5 ns tDR, tDF DOUT rise and fall times, not shown in the Timing Diagrams section 5 12.5 5 12.5 ns tSFS CS high after SCLK edge 5 5 ns t1 Input sync positive pulse width 25 25 μs tSTDR Input sync to data ready valid transition 600 600 μs tNV Data invalid time 210 210 μs t3 Input sync period 910 910 μs 1 Guaranteed by design and characterization but not tested in production. 2 When using the burst read function, the stall period is not applicable. Timing Diagrams CS SCLK DOUT DIN 12 3 4 5 6 15 16 R/W A5 A6 A4 A3 A2 D2 MSB DB14 D1 LSB DB13 DB12 DB10 DB11 DB2 LSB DB1 tCS tSFS tDAV tDHD tDSU Figure 2. SPI Timing and Sequence CS SCLK tREADRATE tSTALL Figure 3. Stall Time and Data Rate CLOCK DATA READY 1 3 NV STDR Figure 4. Input Clock Timing Diagram |
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