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參數(shù)資料
| 型號： | MAX3867 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | +3.3V, 2.5Gbps SDH/SONET Laser Driver with Automatic Power Control |
| 中文描述： | +3.3V、2.5Gbps、 SDH/SONET激光驅(qū)動器，帶有自動功率控制 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 193K |
| 代理商： | MAX3867 |
M
laser package is used to convert the optical power into
a photocurrent. The APC loop adjusts the laser bias
current so that the monitor current is matched to a ref-
erence current set by R
APCSET
. The time constant of
the APC loop is determined by an external capacitor
(C
APC
). To eliminate the pattern-dependent jitter asso-
ciated with the APC loop-time constant, and to guaran-
tee loop stability, the recommended value for C
APC
is
0.1μF.
When the APC loop is functioning, the maximum allow-
able bias current is set by an external resistor, R
BIASMAX
.
An APC failure flag (
FAIL
) is set low when the bias current
can no longer be adjusted to achieve the desired aver-
age optical power. To filter out the APC loop noise, use
an external capacitor at APCFILT with a recommended
value of 0.1μF.
APC closed-loop operation requires the user to set three
currents with external resistors connected between
ground and BIASMAX, MODSET, and APCSET. Detailed
guidelines for these resistor settings are described in
the Design Procedure section.
Open-Loop Operation
If necessary, the MAX3867 is fully operational without
APC. In this case, the laser current is directly set by two
external resistors connected from ground to BIASMAX
+3.3V, 2.5Gbps S DH/S ONET Laser Driver
with Automatic Power Control
8
_______________________________________________________________________________________
LATCH
C
D
C
F
R
F
V
CC
1000pF
I
MD
R
APCSET
R
BIASMAX
R
MODSET
APCSET
CAPC
C
APC
BIASMAX
MD
MODSET
FAIL
BIAS
R
D
25
I
MOD
I
BIAS
L
P
L
P
V
CC
MUX
DATA
CLK
0
1
ENABLE
OUT+
OUT-
D
Q
172X
FAILURE
DETECTOR
40X
5X
MAX3867
Figure 4. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3867E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3867ECM | 功能描述:激光驅(qū)動器 Integrated Circuits (ICs) 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 |
| MAX3869E/D | 功能描述:激光驅(qū)動器 DICE SALES DICE12 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 |
| MAX3869E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3869E/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 |
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