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參數(shù)資料
| 型號： | MAX3766 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quad LVDS Transmitter with Flow-Through Pinout 16-TSSOP -40 to 85 |
| 中文描述： | 622Mbps、LAN/WAN激光驅(qū)動器，帶有自動功率控制及安全關(guān)斷 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 250K |
| 代理商： | MAX3766 |
If PC board space is not a constraint, Maxim recom-
mends enabling the transmitter with a reset-pulse gen-
erator, such as the MAX809, which generates a reset
signal after V
CC
reaches 4.5V (Figure 6). This method
ensures that the transmitter starts correctly, even if the
supply ramps very slowly.
__________________Design Proc edure
S elec t Laser
Select a communications-grade laser with a rise time of
0.5ns or better for 622Mbps applications. The voltage
swing at the OUT+ pin affects the output waveform,
and is largely determined by the laser resistance,
inductance, and modulation current. To obtain the
MAX3766’s AC specifications, the output voltage at
OUT+ must remain above V
CC
- 2.5V at all times.
An approximation for the minimum voltage at OUT+ is
given by the following equation (Table 1):
Select a laser that meets the output voltage criteria. A
high-efficiency laser requires low modulation current
and generates low voltage swing at OUT+. Laser pack-
age inductance can be reduced by trimming leads.
Typical package leads have inductance of 25nH per
inch (1nH/mm). A compensation filter network can also
be used to reduce ringing, edge speed, and voltage
swing.
V
= V
- V
- I
(
OUT(MIN)
CC(MIN)
LASER
t
r
MOD
)
+
+
R
R
L
L
D
M
622Mbps LAN/WAN Laser Driver with
Automatic Power Control and S afety S hutdown
______________________________________________________________________________________
11
MAX3766*
MAX809MEUR-T
SAFETY
C
SAFETY
RESET
V
CC
V
CC
OR
ENABLE
ENABLE
*IN LATCHED SHUTDOWN
CONFIGURATION
Figure 6. Reset Pulse Generator
Table 1. Output Voltage Approximation
Minimum power supply
Laser forward voltage at operating power
V
CC(MIN)
V
LASER
4.5V
1.3V
Laser dynamic resistance
Laser modulation current
R
L
I
OUT
3
30mA
Any damping resistance or line termination in series with the laser
(but not in series with BIAS)
R
D
10
20% to 80% rise time of the laser modulation current, filtered by a
compensation network
t
r
300ps
(20% to 80%)
Total series inductance of laser, laser package, and board traces to the
MAX3766
L
6nH
VARIABLE
Approximation for the lowest voltage at the OUT+ pin
V
OUT(MIN)
DESCRIPTION
TYPICAL VALUE
2.2V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3766E/D | 功能描述:激光驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3766E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3766EEP | 功能描述:激光驅(qū)動器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3766EEP+ | 功能描述:激光驅(qū)動器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3766EEP+T | 功能描述:激光驅(qū)動器 622Mbps LAN/WAN RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
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