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| 型號： | X9530V14I |
| 英文描述： | Temperature Compensated Laser Diode Controller |
| 中文描述： | 溫度補(bǔ)償激光二極管控制器 |
| 文件頁數(shù)： | 20/30頁 |
| 文件大?。?/td> | 479K |
| 代理商： | X9530V14I |
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X9530
Characteristics subject to change without notice.
20 of 30
REV 3.7 8/26/04
www.xicor.com
APPLICATIONS INFORMATION
Temperature Sensing
The X9530’s on-chip temperature sensor functions
similarly to other semiconductor temperature sensors.
The surface mount package (TSSOP) and the Chip
Scale Package both allow good thermal conduction
from the PC board to the die, so the X9530 will provide
an accurate measure of the temperature of the board.
If there is no ambient air movement over the device
package or the board, then the measured temperature
will be very close to that of the board. If there is air
movement over the package and the air temperature is
substantially different from that of the PC board, then
the measured temperature will be at a value between
that of the board and the air. If the X9530 is intended to
sense the temperature of a particular component on
the board, the X9530 should be located as close as
possible to that component to minimize contributions
from other devices or the differential temperatures
across the board.
X9530 LASER DIODE BIAS APPLICATION
EXAMPLE
The X9530 is ideally suited to the control of
temperature sensitive parameters in fiber optic
applications. Figure 20 shows the typical topology of a
laser driver circuit used in many fiber optic transceiver
modules.
This example uses a common anode connected Laser
Diode (LD), in conjunction with a PIN Monitor Photo-
Diode (MPD). The laser diode current (I
LD
) is a
summation of the Bias Current (I
BIAS
), Modulation
Current (I
MOD
) and the Automatic Power Control (APC)
error signal current (I
MON
). The APC circuit uses the
MPD current (I
MON
) as an input, and ensures that a
constant average optical power output of the LD is
maintaned. The modulation circuitry is driven by an
external high speed data source.
Typical control parameters of a LD driver circuit such
as the one shown in Figure 20 may be:
–
I
MODSET
: Sets the I
MOD
level,
–
I
BIASSET
: Sets the I
BIAS
level,
–
I
PINSET
: Sets the average optical power output.
Figure 21 shows how the X9530 may be used to
control these parameters while providing accurate
temperature compensation.
In this example the I1 output of the X9530 drives the
I
MODSET
input of the laser diode circuit. By loading the
appropriate values into the look-up table (LUT1) of the
device, it can dynamically change the modulation
current of the driver circuit. This may be used to
compensate for the effect of reduced laser light output
at elevated temperatures.
Depending upon the type of driver circuit used, the I2
output of the X9530 may be used to control either
I
BIASSET
or I
PINSET
parameters. The example in Figure
21 uses I2 to control the I
PINSET
parameter, while
I
BIASSET
is set at a fixed value using a Xicor Digital
potentiometer.
Similar to the control of the modulation current, I2 may
be used to compensate for changes in I
MON
over
temperature. By loading the appropriate values into the
look-up table (LUT2) of the device, this would have the
effect of dynamically controlling the average optical
power output of the LD (via the APC circuit) over
temperature.
The lookup table values for this fiber optic application
could be determined in two ways. One way is to use
well-defined data for LD and monitor photo diode drift
over temperature, and calculate the appropriate I1 and
I2 values needed at each temperature setting. Another
way is to test the assembled module over temperature
and load values into the tables at each setting. This will
require APC on/off control to determine each MODSET
value. See Xicor application note AN156 for a full
design analysis with LD driver application.
If design requirements are such that no temperature
compensation is necessary for the average optical
power output of the LD, then the I2 output pin could be
used to set the bias current. I
BIASET
of the driver circuit
may be controlled by I2 of the X9530, and the same
current level could be set with control 4 register. This
would provide a constant (temperature independant)
setting for the bias current.
As previously described, the X9530 also contains
general purpose EEPROM memory which may be
accessed by the 2 wire serial bus. In the case of
pluggable fiber optic applications such as GBIC, SFP
or SFF this memory may be used for the storage of
transceiver module parameters.
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| X9530V14I | Temperature Compensated Laser Diode Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X9530-V14I | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Temperature Compensated Laser Diode Controller |
| X9530V14IT1 | 功能描述:IC LASER DIODE CTRLR 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9530V14IT2 | 功能描述:IC LASER DIODE CTRLR 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9530V14IZ | 功能描述:IC LASR CTRLR 1CHAN 5.5V 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| X9530V14IZT1 | 功能描述:IC LASR CTRLR 1CHAN 5.5V 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
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