AD8159 데이터 시트보기 (PDF) - Analog Devices
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AD8159 Datasheet PDF : 24 Pages
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AD8159
Table 6. IN_C Port Input Equalization Settings
EQ_C
EQ
Typical Backplane Length
0
6 dB
0 to 20 inches
1
12 dB
20 to 40+ inches
Table 7. IN_A Port Input Equalization Settings
EQ_A
EQ
Typical Backplane Length
0
6 dB
0 to 20 inches
1
12 dB
20 to 40+ inches
Table 8. IN_B Port Input Equalization Settings
EQ_B
EQ
Typical Backplane Length
0
6 dB
0 to 20 inches
1
12 dB
20 to 40+ inches
Table 9. OUT_C Port Output Pre-Emphasis Settings
PE_C[1] PE_C[0] PE
Overshoot
Typical
Backplane
Length
0
0
0 dB 0%
0 to 10 inches
0
1
1.9 dB 15%
10 to 20 inches
1
0
3.5 dB 35%
20 to 30 inches
1
1
4.9 dB 60%
30 to 40+ inches
Table 10. OUT_A Port Output Pre-Emphasis Settings
PE_A[1] PE_A[0] PE
Typical
Backplane
Overshoot Length
0
0
0 dB 0%
0 to 10 inches
0
1
1.9 dB 15%
10 to 20 inches
1
0
3.5 dB 35%
20 to 30 inches
1
1
4.9 dB 60%
30 to 40+ inches
Table 11. OUT_B Port Output Pre-Emphasis Settings
PE_B[1] PE_B[0] PE
Overshoot
Typical
Backplane
Length
0
0
0 dB 0%
0 to 10 inches
0
1
1.9 dB 15%
10 to 20 inches
1
0
3.5 dB 35%
20 to 30 inches
1
1
4.9 dB 60%
30 to 40+ inches
LOOPBACK
The AD8159 also supports port level loopback, illustrated in
Figure 36. The loopback control pins override the lane select
(SEL[3:0]) and bicast control (BICAST) pins. Table 12 summa-
rizes the different loopback configurations.
IN_C[3:0]
X4
1:2 DEMUX
PORT C LOOPBACK
OUT_C[3:0]
X4
2:1 MUX
X4
OUT_A[3:0]
X4
OUT_B[3:0]
PORT A LOOPBACK
PORT B LOOPBACK
X4
IN_A[3:0]
X4
IN_B[3:0]
Figure 36. Port-Based Loopback Capability
Rev. A | Page 16 of 24
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