AD9239 Analog Devices, AD9239 Datasheet - Page 32

• Manufacturer Part Number: AD9239
• Description: Quad, 12-Bit, 170 MSPS/210 MSPS/250 MSPS Serial Output 1.8 V ADC
• Manufacturer: Analog Devices

Specifications of AD9239

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 250MSPS
• Interface: Ser
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: 1.25 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9239
Table 14. Serial Timing Definitions
Parameter
t
t
t
t
t
t
t
t
t
SCLK
SDIO
DS
DH
CLK
S
H
HI
LO
EN_SDI/SDIO
DIS_SDI/SDIO
CSB
DON’T CARE
DON’T CARE
t
S
R/W
Timing (Minimum, ns)
5
2
40
5
2
16
16
10
10
t
DS
W1
W0
t
DH
A12
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
t
HI
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 78)
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 78)
NUMBER OF SDI/SDIO PINS CONNECTED TOGETHER
10
A10
Figure 77. SDI/SDIO Pin Loading
20
Figure 78. Serial Timing Details
t
LO
A9
Rev. B | Page 32 of 40
30
t
CLK
40
A8
50
A7
60
70
80
D5
90
D4
100
D3
D2
D1
D0
t
H
DON’T CARE
DON’T CARE