参数资料
型号: LTC5100EUF#TR
厂商: Linear Technology
文件页数: 48/52页
文件大小: 0K
描述: IC DRIVER VCSEL 3.2GBPS 16QFN
标准包装: 2,500
类型: 激光二极管驱动器
数据速率: 3.2Gbps
通道数: 1
电源电压: 3.135 V ~ 3.465 V
电流 - 电源: 54mA
电流 - 调制: 12mA
工作温度: -40°C ~ 85°C
封装/外壳: 16-WQFN 裸露焊盘
供应商设备封装: 16-QFN(4x4)
包装: 带卷 (TR)
安装类型: 表面贴装
LTC5100
APPLICATIO S I FOR ATIO
The termination resistor, R1, and its decoupling capacitor,
C1, are placed as close as possible to the LTC5100 to
reduce inductance. Inductance in these two components
causes high frequency peaking and overshoot in the
current delivered to the laser. R1 and C1 are folded against
each other so that their mutual inductance and counter-
flowing current partially cancel their self-inductance. C1
has two vias to the ground plane and a trace directly to Pin
12. The layout shows the EEPROM placed next to the
ENABLE
LTC5100. However, placement of the EEPROM is not
critical. It can be placed several centimeters from the
LTC5100 or on the back of the PC board if desired.
The transmission line connecting the MODB pin to the
laser has a short length of minimum width trace. The net
inductance of this section of trace helps compensate on-
chip capacitance to further reduce reflections from the
chip.
V DD + 3.3V
L1
16
15
14
13
C2
10nF
V SS
+TX_DATA
FERRITE
BEAD
Z O = 50 ?
1
2
V SS
IN +
V DD
EN
SRC
MD
V SS
MODA
12
11
R1
50 ?
C1
10nF
–TX_DATA
3
IN –
LTC5100
MODB
10
Z O = 50 ?
4
V SS
FAULT
SDA
V SS
SCL V DD(HS)
9
FAULT
5
6
7
8
FIBER
C3
NC SDA
V SS
V CC SCL
24LC00
EEPROM
SOT23 PACKAGE
PROGRAMMING
PADS
10nF
5100 F29
Figure 31. Schematic of a Minimum Output Reflection Coefficient Circuit
C1
SCL
V CC
16
V SS 1
15
14
13
12 V SS
R1
C2
IN
+
2
11
MODA
V SS
IN –
3
10
MODB
L1
SDA
NC
V SS 4
5
6
7
8
9 V SS
C3
EEPROM
5100 F32
Figure 32. Layout of the Minimum Reflection Coeffieicnt Circuit Using 0402 Passive Components
sn5100 5100fs
48
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