Datasheet

AD9248
Rev. B | Page 23 of 48
Table 8. PCB Jumpers
JP Description
Normal
Setting
Comment
1 Reference Out 1 V Reference Mode
2 Reference In 1 V Reference Mode
3 Reference Out 1 V Reference Mode
4 Reference Out 1 V Reference Mode
5 Reference Out 1 V Reference Mode
6 Shared Reference Out
7 Shared Reference Out
8 PDWN B Out
9 PDWN A Out
10 Shared Reference Out
11 Duty Cycle In Duty Cycle Restore On
12 Twos Complement Out
13 Input In Using XFMR Input
14 Input In Using XFMR Input
15 Input Out Using XFMR Input
16 Input Out Using XFMR Input
17 AD8138 Supply A Using XFMR Input
18 Input Out Using XFMR Input
19 Input Out
20 Input In
21 Input In
22 AD8138 Supply A
23 Mux Select Out
24 Tie Clocks In Using One Signal for Clock
25 Data Clock A
26 Data Clock Out Using One Signal for Clock
27 Mux Select In
28 OEB_A Out
29 Mux Select Out
30 Data Clock Out
35 OEB_B Out
Table 9. Reference Jumpers
Reference Mode JP1 JP2 JP3 JP4 JP5
1 V Internal Out In Out Out Out
0.5 V Internal Out Out In Out Out
External In Out Out Out In
AD9248
EVALUATION BOARD
SINE SOURCE
LOW JITTER
(HP8644)
SINE SOURCE
LOW JITTER
(HP8644)
BAND-PASS
FILTERS
OUTPUT
BUFFERS
INPUT
CIRCUITRY
CLOCK
CIRCUITRY
AD9248
04446-038
REFERENCE MODE
SELECTION/EXTERNAL
REFERENCE/CONTROL
LOGIC
Figure 39. PCB Test Setup