AD9639 Analog Devices, Inc., AD9639 Datasheet - Page 30

• Manufacturer Part Number: AD9639
• Description: Quad, 12-bit, 170 Msps/210 Msps Serial Output 1.8 V Adc
• Manufacturer: Analog Devices, Inc.

AD9639
Table 14. Serial Timing Definitions
Parameter
t
t
t
t
t
t
t
t
t
DS
DH
CLK
S
H
HIGH
LOW
EN_SDI/SDIO
DIS_SDI/SDIO
SCLK
SDIO
CSB
SDI/
DON’T
CARE
DON’T
CARE
t
S
R/W
Timing (ns min)
5
2
40
5
2
16
16
10
10
t
DS
W1
W0
t
DH
t
A12
HIGH
1.800
1.795
1.790
1.785
1.780
1.775
1.770
1.765
1.760
1.755
1.750
1.745
1.740
1.735
1.730
1.725
1.720
1.715
A11
0
NUMBER OF SDI/SDIO PINS CONNECTED TOGETHER
Description
Setup time between the data and the rising edge of SCLK
Hold time between the data and the rising edge of SCLK
Period of the clock
Setup time between CSB and SCLK
Hold time between CSB and SCLK
Minimum period that SCLK should be in a logic high state
Minimum period that SCLK should be in a logic low state
Minimum time for the SDI/SDIO pin to switch from an input to an output relative to the
SCLK falling edge (not shown in Figure 63)
Minimum time for the SDI/SDIO pin to switch from an output to an input relative to the
SCLK rising edge (not shown in Figure 63)
10
A10
Figure 62. SDI/SDIO Pin Loading
20
t
Figure 63. Serial Timing Details
LOW
A9
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30
t
CLK
40
A8
50
A7
60
70
80
D5
90
100
D4
D3
D2
D1
D0
t
H
DON’T
CARE
DON’T
CARE