MAX3785 データシートの表示（PDF） - Maxim Integrated
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MAX3785 Datasheet PDF : 8 Pages
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6.25Gbps, 1.8V PC Board Equalizer
Typical Operating Characteristics (continued)
(VCC = +1.8V, TA = +25°C, unless otherwise noted. Measurements done at 6.25Gbps, 500mVP-P at the source with a test pattern:
PRBS (27), ninety-six 0s, 1, 0, 1, 0, PRBS (27), ninety-six 1s, 0, 1, 0, 1. Deterministic jitter of the MAX3785 and the board was measured
using Tektronix’s FrameScan. Deterministic jitter of the system was subtracted from the measured value. Eye diagrams were acquired
by FrameScan, which includes system jitter but eliminates random jitter.)
DETERMINISTIC JITTER vs. DATA RATE
FOR 10in OF FR-4 BOARD
(INPUT LEVEL OF 500mVP-P)
30
25
210 - 1
20
CRPAT
15
10
5
0
2.5
TEST
27 - 1 PATTERN
K28.5
3.5
4.5
5.5
6.5
DATA RATE (Gbps)
DETERMINISTIC JITTER vs. DATA RATE
FOR 20in OF FR-4 BOARD
(INPUT LEVEL OF 500mVP-P)
30
210 - 1
25
CRPAT
20
15
TEST
10
PATTERN
K28.5
5
27 - 1
0
2.5
3.5
4.5
5.5
6.5
DATA RATE (Gbps)
DETERMINISTIC JITTER vs. DATA RATE
FOR 30in OF FR-4 BOARD
(INPUT LEVEL OF 500mVP-P)
30
CRPAT
25
20 TEST PATTERN
15
210 - 1
10
K28.5
27 - 1
5
0
2.5
3.5
4.5
5.5
6.5
DATA RATE (Gbps)
EQUALIZER INPUT RETURN GAIN (SDD11)
(INPUT SIGNAL LEVEL = -40dBm, POWER OFF)
30
20
10
0
-10
-20
-30
-40
100
1000
FREQUENCY (MHz)
10,000
EQUALIZER INPUT RETURN GAIN (SDD22)
(INPUT SIGNAL LEVEL = -40dBm, IN+ HIGH)
30
20
10
0
-10
-20
-30
-40
100
1000
FREQUENCY (MHz)
10,000
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