LTC5100EUF#PBF Linear Technology, LTC5100EUF#PBF Datasheet - Page 50

• Manufacturer Part Number: LTC5100EUF#PBF
• Description: IC DRIVER VCSEL 3.2GBPS 16QFN
• Manufacturer: Linear Technology
• Type: Laser Diode Driverr

Specifications of LTC5100EUF#PBF

• Data Rate: 3.2Gbps
• Number Of Channels: 1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Current - Supply: 54mA
• Current - Modulation: 12mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-QFN
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIO S I FOR ATIO
LTC5100
The laser’s monitor diode (if needed) can be attached to
either pin of 2-pin header H2 (labeled MD) or to the test
turret labeled MD. H2 is a 2mm, 2-pin header with 0.5mm
square pins.
The demo board includes an EEPROM that provides non-
volatile storage for the LTC5100’s configuration settings
and parameters. For example, the EEPROM stores param-
eters for the laser bias and modulation levels as well as
temperature coefficients and fault detection modes. The
LTC5100 transfers the data in the EEPROM to its internal
registers at power up. The LTC5100 is designed for hot
plugging and can be configured to load the EEPROM and
enable the transmitter as soon as power is applied. Be
50
150mA MAX
5V 5%
GND
V
P2
CC
5V
GND1
GND2
SDA
P1
SCL
5V
5V
H3
SDA
GND
SDA
U
GND
GND
GND
3A SCHOTTKY
SCL
U
SCL
FAULT
D2
8
7
6
5
LT1762EMS8-3.3
IN
NC
NC
SHDN
+
Figure 33. Schematic Diagram of the DC499 Demo Board
W
IN
IN
U3
SENSE
+
–
C6
10 F
GND
OUT
BYP
SMA
SMA
J1
J2
1
2
3
4
3.3V
NC
5-LEAD SOT23 PACKAGE
24LC00 EEPROM
V
+
U
DD1
128 BITS
50
50
C4
10 F
U2
1
JP3
I
DD
2
10 F
C5
+
3A SCHOTTKY
V
careful with this mode of operation! It is possible to
leave the EEPROM in a state that automatically turns the
laser on at power up.
The LTC5100’s FAULT output is available at the test turret
labeled “FAULT.” The FAULT pin can be software config-
ured with several output pull-up options, including open
drain.
The demo board has three jumpers for enabling the
transmitter, observing the electrical eye diagram, and
measuring the LTC5100’s power supply current. Details of
the use of these jumpers are given in the DC499 demo
manual.
DD2
V
DD
1
2
3
4
1
V
IN
IN
V
ENABLE
TRANS
SS
SS
+
JP1
–
D3
EN
16
5
2
LTC5100
15
6
U1
22.1k
26.7k
SRC
R2
R3
14
7
13
8
MODA
MODB
1
10nF
MD
C3
L1
BLM15AG121PN1D
V
V
3
4
SS
SS
MD
H2
+
–
12
11
10
9
2
V
V
+
–
5
2
V
OUT
TERMINATION
U4
LT1812
RESISTOR
BEFORE ATTACHING
0.1 F
49.9
REMOVE JUMPER
1
R1
C7
A LASER DIODE!
50
LTC5100 CORE
APPLICATIONS CIRCUIT
22.1k
10
ELEC
R4
R5
10nF
EYE
C1
1
JP2
1
(OPTIONAL)
1.8V
10nF
C2
5100 F33
sn5100 5100fs
J3
SMA