Datasheet

_______________________________________________________________________________________ 7
MAX3946
1Gbps to 11.3Gbps, SFP+ Laser Driver
with Laser Impedance Mismatch Tolerance
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, data pattern = 2
7
- 1 PRBS + 72 zeros + 2
7
- 1 PRBS (inverted) +72 ones, unless otherwise noted.)
10.3Gbps ELECTRICAL EYE DIAGRAM
MAX3946 toc02
20ps/div
2
23
- 1 PRBS
10.3Gbps OPTICAL EYE DIAGRAM
MAX3946 toc01
INPUT DIFFERENTIAL RETURN LOSS
vs. FREQUENCY
MAX3946 toc03
FREQUENCY (MHz)
SDD11 (dB)
10,0001000
-30
-25
-20
-15
-10
-5
0
-35
100 100,000
INPUT COMMON-MODE RETURN LOSS
vs. FREQUENCY
MAX3946 toc04
FREQUENCY (MHz)
SCC11 (dB)
10,000
-30
-25
-20
-15
-10
-5
0
-35
1000 100,000
INPUT DIFFERENTIAL TO COMMON-MODE
RETURN LOSS vs. FREQUENCY
MAX3946 toc05
FREQUENCY (MHz)
SCD11 (dB)
10,0001000
-40
-30
-20
-10
0
-50
100 100,000
OUTPUT DIFFERENTIAL RETURN LOSS
vs. FREQUENCY
MAX3946 toc06
FREQUENCY (MHz)
SDD22 (dB)
10,0001000
-40
-30
-20
-10
0
-50
100 100,000
OUTPUT COMMON-MODE RETURN LOSS
vs. FREQUENCY
MAX3946 toc07
FREQUENCY (MHz)
SCC22 (dB)
10,0001000
-30
-25
-20
-15
-10
-5
0
-35
100 100,000
RANDOM JITTER vs. MODULATION
CURRENT (AT LOAD)
MAX3946 toc08
MODULATION CURRENT (mA
P-P
)
RJ (ps
RMS
)
706040 5020 3010
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0 80
11.3Gbps, 25Ω DIFFERENTIAL LOAD
1111 0000 PATTERN