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參數(shù)資料
| 型號： | LXT19908 |
| 英文描述： | Amplifier. Other |
| 中文描述： | 放大器。其他 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 45K |
| 代理商： | LXT19908 |
Feature
Benefit
40dB single end gain
High dynamic range
Input sensitivity: 2x5mVpp differential and
1x10mVpp single-ended input
Helps increase power budget
Power supply: -5.2V
Easy board design and integration
Adjustable output 0-1Vpp
Interoperability between CDR and DEMUX
components
260-800mW power dissipation
High integration
Ceramic QFP package
No heat sink and small form factor
(5.8x5.8 mm)
Typical Receiver Line Card
Application Overview
An optical reception system receives an optical
signal and converts it to an electrical signal. The
optical receiver, a PIN diode or an Avalanche Photo
Detector (APD) converts the optical input to a small
electrical current. The current is converted to an
electrical voltage by a Trans-Impedance Amplifier
(TIA), often called a post-amplifier. The signal from
the TIA varies from a few mV to 50mVpp or more,
and can be passed to an AGC amplifier or a LIA
to obtain a signal with sufficient power to drive
the next building block as shown in Figure 2.
The LIA generates an output signal composed
of square pulses due to the large internal gain
combined with the cutting of the signal extremes.
The CDR device converts the analog input signal
to a digital bit stream with an associated clock
signal. Finally, the serial high-speed data stream
is converted to a parallel signal at lower speed,
which interfaces with the digital processing system.
Pre-Amplifier Application
When the GiGA LXT19908 is used as a pre-amplifier
with the
GD
16584 (10Gbit/s) or
GD
16588
(10.7Gbit/s), optimal sensitivity is obtained when
the adjustable output is set to approximately 400mV
amplitude (600mVpp). The LXT19908 can be
coupled directly to the
GD
16584 or
GD
16588,
as illustrated in the system diagram, Figure 3.
O/E
TIA
CDR
DeMUX
ASIC
LIA/
AGC
CLK
CLK
Figure 2. Typical receiver line card
Figure 3. Pre-Amplifier Application
VOUT
VSET
VOUTN
DI
DIN
LXT19908
GD16584
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