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參數(shù)資料
| 型號： | MAX3935EGJ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | 10.7Gbps EAM Driver |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, 0.90 MM HEIGHT, QFN-32 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 1544K |
| 代理商： | MAX3935EGJ |
To keep the bias and modulation currents in compli-
ance, the following constraint on the total current must
be made for 50
EAM modules:
|V
EE
| - (I
BIAS
+ I
MOD
)
30
≥
1.55V
External Op Amp Selection
External op amps are required for regulating the bias
and modulation currents. The ability to operate from a
single supply with input common-mode range extend-
ing to the negative supply rail is critical in the op amp
selection. Low bias current and high PSRR also are
important. Bias current to the inverting input passes
through a 5k
resistor. This could add an error to the
voltage produced by the modulation and bias current-
sense resistors. The op amp gain bandwidth must be
high enough to regulate at the power-supply ripple fre-
quency on V
EE
.
Pulse-Width Control Setup
Two methods of control are possible when pulse predis-
tortion is desired to minimize distortion at the receiver.
The pulse width can be set with a 2k
potentiometer (or
equivalent fixed resistors); or applying a voltage, with
V
EE
+ 1V common mode, to the PWC pins can set it. See
Table 1 for the desired effect of the pulse-width setting.
I
V
BIAS
BIASREF
7 5
=
M
10.7Gbps EAM Driver
_______________________________________________________________________________________
9
Table 1. Pulse-Width Control
V
EE
2k
R
PWC
PWC+
PWC-
50
V
TT
50
DATA-
1mA
1mA
DATA+
CLK-
CLK+
V
TT
50
50
50
50
50
50
D
Q
0
MUX
1
PWC
R
BIAS
R
MOD
5k
5k
BIASMON
V
EE
BIASSET
V
EE
MODMON
MODSET
I
BIAS
I
MOD
EAM
50
50
MODN1
MOD
MOD2
MOD1
MODN2
BIAS
L
100
100
75
75
MODEN
RTEN
Figure 3. MAX3935EGJ Functional Diagram
PULSE
WIDTH
RP, RN for
RP + RN = 2k
1k
or Open
RP > RN
RP < RN
V
PWC+
,
V
PWC-
for
V
CM
= V
EE
+ 1V
V
PWC+
= V
PWC-
= V
EE
+ 1V
V
PWC+
> V
PWC-
V
PWC+
< V
PWC-
100%
>100%
<100%
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|---|---|
| MAX3935 | 10.7Gbps EAM Driver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3935EGJ+T | 功能描述:通信集成電路 - 若干 RoHS:否 制造商:Maxim Integrated 類型:Transport Devices 封裝 / 箱體:TECSBGA-256 數(shù)據(jù)速率:100 Mbps 電源電壓-最大:1.89 V, 3.465 V 電源電壓-最小:1.71 V, 3.135 V 電源電流:50 mA, 225 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MAX3935EGJ-T | 功能描述:緩沖器和線路驅(qū)動器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| MAX3935EJG | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX3935EVKIT | 功能描述:其他開發(fā)工具 RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評估:ELEV-8 Quadcopter 工作電源電壓: |
| MAX393C/D | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
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