MAX3982 データシートの表示（PDF） - Maxim Integrated
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MAX3982 Datasheet PDF : 15 Pages
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SFP Copper-Cable Preemphasis Driver
SIGNAL
A
SOURCE
TEST SETUP
PC BOARD (FR4)
MAX3982
6 mil
IN
OUT
6 mil
B
24AWG 100Ω TWIN-AX
SMA CONNECTORS
OSCILLOSCOPE OR
ERROR DETECTOR
D
1in ≤ L ≤ 12in
L ≤ 1in
MAX3748
6 mil
IN
OUT
FR4
4.0 ≤ εR ≤ 4.4
tan δ = 0.022
L = 2in
L ≤ 1in
39Ω
22pF
22pF
39Ω
SMA CONNECTORS
Figure 3. End-to-End Test Setup Using the MAX3748 as a Receiver. Deterministic jitter and eye diagrams measured at point D.
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted. PRBS7 + 100CID pattern is PRBS 27, 100 zeros, 1010, PRBS 27, 100 ones, 0101.)
TRANSIENT RESPONSE
MAX3982 toc01
4.25Gbps K28.7 PATTERN
OUTLEV = HIGH
A
B
C
D
D
C
B
A
A = 2dB, PE = 00
B = 4dB, PE = 01
C = 8dB, PE = 10
D = 14dB, PE = 11
END-TO-END DETERMINISTIC JITTER
vs. CABLE LENGTH AT 4.25Gbps
1.0
4.25Gbps PRBS7 + 100CID PE[1,0] = 00
0.9
0.8 12in FR4 AT INPUT PE[1,0] = 01
0.7 USING MAX3748 AS
RECEIVER, AS SHOWN
0.6 IN FIGURE 3
0.5
PE[1,0] = 10
0.4 PE[1,0] = 11
0.3
0.2
0.1
0
0
5
10
15
20
CABLE LENGTH (m)
END-TO-END DETERMINISTIC JITTER
vs. CABLE LENGTH AT 2.125Gbps
1.0
2.125Gbps PRBS7 + 100CID
0.9
12in FR4 AT INPUT
0.8 USING MAX3748 AS RECEIVER,
0.7 AS SHOWN IN FIGURE 3
PE[1,0] = 00
0.6
0.5
PE[1,0] = 01
0.4
PE[1,0] = 10
0.3
PE[1,0] = 11
0.2
0.1
0
0
5
10
15
20
CABLE LENGTH (m)
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