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AD9681 bảng dữ liệu(PDF) 9 Page - Analog Devices

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Giải thích chi tiết về linh kiện  1.8 V Analog-to-Digital Converter
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AD9681 bảng dữ liệu(HTML) 9 Page - Analog Devices

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AD9681
Data Sheet
Rev. C | Page 8 of 40
TIMING SPECIFICATIONS
Table 5.
Parameter
Description
Limit
Unit
SYNC TIMING REQUIREMENTS
tSSYNC
SYNC to rising edge of CLK+ setup time
1.2
ns min
tHSYNC
SYNC to rising edge of CLK+ hold time
−0.2
ns min
SPI TIMING REQUIREMENTS
See Figure 53
tDS
Setup time between the data and the rising edge of SCLK
2
ns min
tDH
Hold time between the data and the rising edge of SCLK
2
ns min
tCLK
Period of the SCLK
40
ns min
tS
Setup time between CSB1/CSB2 and SCLK
2
ns min
tH
Hold time between CSB1/CSB2 and SCLK
2
ns min
tHIGH
SCLK pulse width high
10
ns min
tLOW
SCLK pulse width low
10
ns min
tEN_SDIO
Time required for the SDIO pin to switch from an input to an output relative to the
SCLK falling edge (not shown in Figure 53)
10
ns min
tDIS_SDIO
Time required for the SDIO pin to switch from an output to an input relative to the
SCLK rising edge (not shown in Figure 53)
10
ns min
Timing Diagrams
Refer to the Memory Map Register Descriptions section and Table 21 for SPI register setting of output modes.
D0–A1
D0+A1
D1–A1
D1+A1
FCO–1, FCO–2
BYTEWISE
MODE
FCO+1, FCO+2
D0–A1
D0+A1
D1–A1
D1+A1
FCO–1, FCO–2
DCO–1, DCO–2
DCO+1, DCO+2
DCO+1, DCO+2
CLK+
VIN±x1, VIN±x2
CLK–
DCO–1, DCO–2
FCO+1, FCO+2
BITWISE
MODE
SDR
DDR
MSB
N – 17
D12
N – 17
D11
N – 17
D10
N – 17
D09
N – 17
D08
N – 17
D07
N – 17
D06
N – 17
MSB
N – 16
D12
N – 16
D11
N – 16
D10
N – 16
D09
N – 16
D08
N – 16
D07
N – 16
D06
N – 16
D05
N – 17
D04
N – 17
D03
N – 17
D02
N – 17
D01
N – 17
LSB
N – 17
0
N – 17
0
N – 17
D05
N – 16
D04
N – 16
D03
N – 16
D02
N – 16
D01
N – 16
LSB
N – 16
0
N – 16
0
N – 16
MSB
N – 17
D11
N – 17
D09
N – 17
D07
N – 17
D05
N – 17
D03
N – 17
D01
N – 17
0
N – 17
MSB
N – 16
D11
N – 16
D09
N – 16
D07
N – 16
D05
N – 16
D03
N – 16
D01
N – 16
0
N – 16
D12
N – 17
D10
N – 17
D08
N – 17
D06
N – 17
D04
N – 17
D02
N – 17
LSB
N – 17
0
N – 17
D12
N – 16
D10
N – 16
D08
N – 16
D06
N – 16
D04
N – 16
D02
N – 16
LSB
N – 16
0
N – 16
tA
tDATA
tLD
tEH
tFCO
tFRAME
tPD
tCPD
tEL
N – 1
N
N + 1
Figure 3. 16-Bit DDR/SDR, Two-Lane, 1× Frame Mode (Default)



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