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LTC5100EUF Datasheet(PDF) 47 Page - Linear Technology

Part # LTC5100EUF
Description  3.3V, 3.2Gbps VCSEL Driver
PDF  52 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC5100EUF Datasheet(HTML) 47 Page - Linear Technology

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LTC5100
47
sn5100 5100fs
APPLICATIO S I FOR ATIO
HIGH SPEED DESIGN AND LAYOUT
Figure 29 and Figure 30 show the schematic and layout of
a minimum component count circuit for standalone op-
eration. The exposed pad of the package is soldered to a
copper pad on top of the board, and nine vias couple this
pad to the ground plane. The four VSS pins (Pins 1, 4, 9,
and 12) have webs of copper connecting them to the cen-
tral pad to reduce ground inductance. The laser modula-
tion current returns to the ground plane primarily through
the exposed pad. Any measures that reduce the induc-
tance from the pad to the ground plane improve the modu-
lation waveforms and reduce RFI.
FAULT
SDA
SCL VDD(HS)
VDD
VSS
IN+
IN–
VSS
VSS
MODA
MODB
VSS
EN
SRC
LTC5100
MD
13
12
R1
50
Ω
C1
10nF
ZO = 50Ω
11
10
9
1
L1
FERRITE
BEAD
ENABLE
+TX_DATA
–TX_DATA
FAULT
VDD + 3.3V
VSS
2
3
4
14
15
16
8
FIBER
C3
10nF
24LC00
EEPROM
SOT23 PACKAGE
PROGRAMMING
PADS
5100 F29
7
6
5
ZO = 50Ω
VCC
NC
SCL
VSS
SDA
IN+
VSS
IN–
EEPROM
C1
R1
L1
C3
2
3
VSS
VSS
5100 F30
MODA
MODB
1
16
15
14
13
VSS 4
11
10
12
9
5678
SCL
VCC
VSS
SDA
NC
Figure 29. Schematic of a Minimum Component Count Circuit
Figure 30. Layout of the Minimum Component Count Circuit Using 0402 Passive Components



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