AD9238 Analog Devices, AD9238 Datasheet - Page 22

• Manufacturer Part Number: AD9238
• Description: Dual 12-Bit, 20/40/65 MSPS, 3 V ADC
• Manufacturer: Analog Devices

Specifications of AD9238

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP,QFP

AD9238
Table 8. PCB Jumpers
JP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
35
Description
Reference
Reference
Reference
Reference
Reference
Shared Reference
Shared Reference
PDWN B
PDWN A
Shared Reference
Duty Cycle
Twos Complement
Input
Input
Input
Input
AD8138 Supply
Input
Input
Input
Input
AD8138 Supply
Mux Select
Tie Clocks
Data Clock
Data Clock
Mux Select
OEB_A
Mux Select
Data Clock
OEB_B
Normal
Setting
Out
In
Out
Out
Out
Out
Out
Out
Out
Out
In
Out
In
In
Out
Out
A
Out
Out
In
In
A
Out
In
A
Out
In
Out
Out
Out
Out
Comment
1 V Reference Mode
1 V Reference Mode
1 V Reference Mode
1 V Reference Mode
1 V Reference Mode
Duty Cycle Restore On
Using XFMR Input
Using XFMR Input
Using XFMR Input
Using XFMR Input
Using XFMR Input
Using XFMR Input
Using One Signal for Clock
Using One Signal for Clock
Rev. C | Page 22 of 48
Table 9. Reference Jumpers
Reference Mode
1 V Internal
0.5 V Internal
External
SINE SOURCES
LOW JITTER
BAND-PASS
(HP8644)
FILTERS
EVALUATION BOARD
Figure 39. PCB Test Setup
CIRCUITRY
JP1
Out
Out
In
AD9238
INPUT
SELECTION/EXTERNAL
REFERENCE/CONTROL
JP2
In
Out
Out
REFERENCE MODE
SINE SOURCE
LOW JITTER
CIRCUITRY
(HP8644)
AD9238
CLOCK
LOGIC
JP3
Out
In
Out
JP4
Out
Out
Out
BUFFERS
OUTPUT
JP5
Out
Out
In