參數(shù)資料
型號(hào)： FOA2322A
廠商： INFINEON TECHNOLOGIES AG
英文描述： 3.2 Gbi t /s Laser Driver IC for Telecom and Datacom Applications
中文描述： 3.2陸基攔截噸/ s的電信和數(shù)據(jù)通信應(yīng)用激光驅(qū)動(dòng)器集成電路
文件頁(yè)數(shù)： 27/37頁(yè)
文件大?。?/td> 542K
代理商： FOA2322A
FOA2322A
Pin Description
Preliminary Data Sheet
23
2001-05
IBIAS
Bias Output
A sink current drawn by IBIAS determines the laser
diode bias current.
The bias controller characteristic is set to an
i-controller. The cutoff frequency can be decreased
by an external capacitor at CBIAS to
V
EE
.
MPOUT is an open collector output for pulling up a
resistor to monitor the deviation of the optical
power over the monitor diode current. Let open if
not used.
A resistor between RPOUT and
V
EE
can adjust the
relation of optical power measured over the
monitor diode current to output current at MPOUT.
Let open if the monitoring of the optical power is not
used.
This output can be connected to the base of an
external bias current NPN transistor. It can be
leave open if not used. It is dedicated for
applications which can not use the internal bias
transistor. Base of the output current mirror 1:25.
This is the controller feedback input. The voltage at
this input represents the monitor diode current and
by this the laser output power. The bias current will
be controlled to an equal level of
V
MD
and
V
MDR
.
Whenever the laser diode is disabled LDOFF will
deliver a high voltage level closed to
V
CC
. If the
laser diode is enabled there is a sink current to
drive the base of an external pnp transistor to
support a laser diode supply shut down. If not used
this output can be leave open without Laser Driver
performance restrictions. There is an internal pull
up resistor between LDOFF and
V
CC
A
of 10k.
Low active reset input. This input resets the LF
indication if present. Further the laser diode is held
within shut down mode if this signal is at low level.
For constant laser diode enable this signal can be
tied to
V
CC
.
CBIAS
Control
MPOUT
Monitor Output
RPOUT
Control
VBIAS
Bias Output
MD
Monitor Diode
Input
LDOFF
Laser Shut Down
Output
RSTN
Logic Input
Table 6
Signal Name Function
Pin Definitions and Functions
(cont
’
d)
Explanation
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