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參數(shù)資料
| 型號(hào)： | ADN2525 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 10.7 Gbps Active Back-Termination, Differential Laser Diode Driver |
| 中文描述： | 10.7 Gbps的主動(dòng)背終止，差分激光二極管驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 531K |
| 代理商： | ADN2525 |
ADN2525
The equivalent circuits of the BSET, IBIAS, and IBMON pins
are shown in Figure 20, Figure 21, and Figure 22.
Rev. 0 | Page 10 of 16
0
VCC
BSET
VCC
800
200
Figure 20. Equivalent Circuit of the BSET Pin
0
2
2k
100
IBIAS
VCC
VCC
Figure 21. Equivalent Circuit of the IBIAS Pin
0
VCC
IBMON
VCC
100
500
VCC
Figure 22. Equivalent Circuit of the IBMON Pin
The recommended configuration for BSET, IBIAS, and IBMON
is shown in Figure 23.
ADN2525
BSET
VBSET
GND
IBMON
IBIAS
TO LASER CATHODE
L
R
IBMON
1k
IBIAS
0
Figure 23. Recommended Configuration for BSET, IBIAS, and IBMON Pins
The circuit used to drive the BSET voltage must be able to drive
the 1 k input resistance of the BSET pin. For proper operation
of the bias current source, the voltage at the IBIAS pin must be
between the compliance voltage specifications for this pin over
supply, temperature, and bias current range. See the Specifications
table. The maximum compliance voltage is specified for only
two bias current levels (10 mA and 100 mA), but it can be
calculated for any bias current by using the following equation:
V
COMPLIANCE_MAX
(V) =
VCC
(V) 0.75 4.4 ×
IBIAS
(A)
See the Applications Information section for example headroom
calculations.
The function of the inductor L is to isolate the capacitance of
the IBIAS output from the high frequency signal path. For
recommended components, see Table 5.
AUTOMATIC LASER SHUTDOWN (ALS)
The ALS pin is a digital input that enables/disables both the bias
and modulation currents, depending on the logic state applied,
as shown in Table 4.
Table 4.
ALS Logic State
High
Low
Floating
IBIAS and IMOD
Disabled
Enabled
Enabled
The ALS pin is compatible with 3.3 V CMOS and TTL logic
levels. Its equivalent circuit is shown in Figure 24.
0
VCC
ALS
VCC
100
50k
2k
Figure 24. Equivalent Circuit of the ALS Pin
MODULATION CURRENT
The modulation current can be controlled by applying a dc
voltage to the MSET pin. This voltage is converted into a dc
current by using a voltage-to-current converter using an
operational amplifier and a bipolar transistor as shown in
Figure 25.
0
50
IMOD
200
800
MSET
GND
IMODP
IMODN
ADN2525
VCC
FROM INPUT STAGE
Figure 25. Generation of Modulation Current on the ADN2525
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| ADN2525ACPZ-500R7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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| ADN2525ACPZ-R2 | 功能描述:IC LASER DRIVER 10.7GBPS 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)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(dòng)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 |
| ADN2525ACPZ-REEL7 | 功能描述:IC LASER DRIVER 10.7GBPS 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)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(dòng)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 |
| ADN2525ACPZ-WP | 制造商:Analog Devices 功能描述:Laser Driver 10.7Gbps 1-CH 16-Pin LFCSP EP Waffle 制造商:Analog Devices 功能描述:LASER DRVR 10.7GBPS 1CH 16LFCSP - Waffle Pack |
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