參數(shù)資料
型號(hào)： MAX3935
廠商： Maxim Integrated Products, Inc.
英文描述： 10.7Gbps EAM Driver
中文描述： 10.7Gbps EAM驅(qū)動(dòng)器
文件頁(yè)數(shù)： 8/14頁(yè)
文件大?。?/td> 1544K
代理商： MAX3935
M
Optional Input Data Retiming
To eliminate pattern-dependent jitter in the input data,
connect a synchronous differential clock signal to the
CLK+ and CLK- inputs, and the
RTEN
control input
should be tied low. The input data is retimed on the ris-
ing edge of CLK+. If
RTEN
is tied high or left floating,
the retiming function is disabled and the input data is
directly connected to the output stage. Leave CLK+
and CLK- open when retiming is disabled.
Pulse-Width Control
The pulse-width control circuit can be used to minimize
pulse-width distortion. The differential voltage between
PWC+ and PWC- adjusts the pulse-width compensa-
tion. When PWC+ and PWC- are left open, the pulse-
width control circuit is automatically disabled.
Modulation Output Enable
The MAX3935 incorporates a modulation current
enable input. When
MODEN
is low, the modulation out-
put (MOD) is enabled. When
MODEN
is high or floating,
the output is disabled. In the disabled condition, the
modulation output sinks current to keep the EAM mod-
ule in the high-absorption state. The typical EAM
enable time is 2ns, and the typical disable time is 5ns.
Current Monitors
The MAX3935 features a bias-current monitor output
(BIASMON) and a modulation-current monitor output
(MODMON). The voltage at BIASMON is equal to (I
BIAS
R
BIAS
) + V
EE
, and the voltage at MODMON is equal
to (I
MOD
R
MOD
) + V
EE
. I
BIAS
and I
MOD
are shown in
Figure 3. The internal resistors R
BIAS
and R
MOD
are
7.5
and 3
, respectively (±10%). Connect BIASMON
and MODMON to the inverting input of an op amp to
program the bias and modulation current (see
Design
Procedure
).
Design Procedure
Programming the Modulation Voltage
The EAM modulation voltage results from I
MOD
passing
through the EAM impedance in parallel with the internal
75
termination resistor.
To program the desired modulation current, connect
the inverting input of an op amp (see the
Typical
Application Circuit
) to MODMON and connect the out-
put to MODSET. Connect the positive op amp voltage
supply to ground and the negative supply to V
EE
. The
modulation current is set by connecting a reference
voltage V
MODREF
to the noninverting input of the op
amp. See the Modulation Voltage vs. V
MODREF
graph in the
Typical Operating Characteristics
to select
the value of V
MODREF
that corresponds to the required
modulation current.
V
MOD
=
Programming the Bias Voltage
The EAM bias voltage results from I
BIAS
passing
through the EAM impedance in parallel with the internal
75
termination resistor.
To program the desired EAM bias current, connect the
inverting input of an op amp (see the
Typical Application
Circuit
) to BIASMON and connect the output to BIASSET.
Connect the positive op amp voltage supply to ground
and the negative supply to V
EE
. The EAM bias current is
set by connecting a reference voltage V
BIASREF
to the
noninverting input of the op amp. See the Bias Voltage
vs. V
BIASREF
graph in the
Typical Operating
Characteristics
to select the value of V
BIAS
that corre-
sponds to the required EAM bias voltage.
V
I
Z
Z
BIAS
BIAS
EAM
EAM
≈
×
×
+
75
75
I
MODREF
3
V
I
Z
Z
MOD
MOD
EAM
EAM
≈
×
×
+
75
75
10.7Gbps EAM Driver
8
_______________________________________________________________________________________
Figure 2. Required Input Signal, Setup/Hold-Time Definition
and Output Polarity
0.6V
TO 3.0V
V
= 0.3V
TO 2.0V
V
= 0.15V
TO 1.0V
V
= 0.15V
TO 1.0V
t
HD
t
SU
VOUT
(DATA+) - (DATA-)
CLK+
CLK-
DATA-
DATA+
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MAX3935E/D 功能描述:緩沖器和線路驅(qū)動(dòng)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
MAX3935E/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX3935EGJ 功能描述:緩沖器和線路驅(qū)動(dòng)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
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(dòng)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
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