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參數(shù)資料
| 型號(hào)： | MAX3736ETE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 其它接口 |
| 英文描述： | 3.2Gbps, Low-Power, Compact, SFP Laser Driver |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC16 |
| 封裝： | 3 X 3 MM, TQFN-16 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大?。?/td> | 341K |
| 代理商： | MAX3736ETE |
M
High-Speed Modulation Driver
The output stage is composed of a high-speed differ-
ential pair and a programmable modulation current
source. The MAX3736 is optimized for driving a 15
load; the minimum instantaneous voltage required at
OUT+ is 0.6V. Modulation current swings up to 60mA
are possible.
To interface with the laser diode, a damping resistor
(R
D
) is required for impedance matching. The com-
bined resistance of the series damping resistor and the
equivalent series resistance of the laser diode should
equal 15
. To reduce optical output aberrations and
duty-cycle distortion caused by laser diode parasitic
inductance, an RC shunt network might be necessary.
Refer to Maxim Application Note
HFAN 02.0:
Interfacing Maxim’s Laser Drivers to Laser Diodes
for
more information.
At high data rates, e.g., 2.5Gbps, any capacitive load at
the cathode of a laser diode degrades optical output per-
formance. Because the BIAS output is directly connected
to the laser cathode, minimize the parasitic capacitance
associated with the pin by using an inductor to isolate the
BIAS pin parasitics from the laser cathode.
In the absence of input data, the modulation current
switches to OUT-, squelching the transceiver output.
Disable
The DIS pin disables the modulation and bias current.
The typical enable time is 2μs for bias current and 1μs
for modulation current. The typical disable time is 200ns
for bias current and 250μs for modulation current. The
DIS pin has a 7.4k
internal pullup resistor.
Design Procedure
Programming the Modulation Current
There are three methods for setting the modulation cur-
rent on the MAX3736 laser driver. The current can be
set by using a current DAC, a voltage DAC in series with
a resistor, or by using a resistor connected to GND.
To program the laser modulation current using a cur-
rent DAC, attach the DAC to the MODSET pin and set
the current using the following equation:
To program the laser modulation current using a volt-
age DAC, attach the DAC to the MODSET pin through a
series resistor, R
SERIES
, and set the current using the
following equation:
To program the laser modulation current using a resis-
tor, place the resistor from MODSET to ground. I
MOD
current can be calculated by the following equation:
Programming the Bias Current
There are three methods for setting the bias current on
the MAX3736 laser driver. The current can be set by
using a current DAC, a voltage DAC in series with a
resistor, or by using a resistor connected to GND.
To program the laser bias current using a current DAC,
attach the DAC to the BIASSET pin and set the current
using the following equation:
To program the laser bias current using a voltage DAC,
attach the DAC to the BIASSET pin through a series
resistor, R
SERIES
, and set the current using the follow-
ing equation:
To program the laser bias current using a resistor,
place the resistor from BIASSET to ground. I
BIAS
cur-
rent can be calculated by the following equation:
I
V
R
BIAS
BIASET
=
×
1 2
.
85
I
V
V
R
BIAS
DAC
SERIES
=
×
1 2
.
85
I
I
BIAS
BIASET
=
×
85
I
V
R
MOD
MODSET
=
×
1 2
.
85
I
V
V
R
MOD
DAC
SERIES
=
×
1 2
.
85
I
I
MOD
MODSET
=
×
85
3.2Gbps, Low-Power, Compact,
SFP Laser Driver
8
_______________________________________________________________________________________
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3736ETE+ | 功能描述:激光驅(qū)動(dòng)器 3.2Gbps Low-Power SFP Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3736ETE+T | 功能描述:激光驅(qū)動(dòng)器 3.2Gbps Low-Power SFP Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3736ETE-T | 功能描述:激光驅(qū)動(dòng)器 3.2Gbps Low-Power SFP Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3736EVKIT | 功能描述:激光驅(qū)動(dòng)器 3.2Gbps Low-Power Compact SFP Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3737EGJ | 功能描述:激光驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
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