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| 型号： | MAX3964AETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC AMP LIMITING SGNL DET 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 类型： | 限幅放大器 |
| 应用： | 光纤学网络 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
MAX3964A/MAX3968
+3.0V to +5.5V, 125Mbps to 266Mbps
Limiting Amplifiers with Loss-of-Signal Detector
_______________________________________________________________________________________
7
Loss-of-Signal Comparator
The LOS comparator indicates when the input signal
power is below the programmed LOS threshold. To
ensure supply and temperature independence, VTH is
generated by a 1.2V bandgap reference. The op amp’s
external gain-setting resistors (R1 and R2) can be
chosen to set VTH between 1.2V and 2.4V. To ensure
chatter-free operation, the LOS comparator is designed
with approximately 5dB of hysteresis.
Squelch
The squelch function disables the data outputs by forc-
ing OUT- low and OUT+ high during a LOS condition.
This function ensures that when there is a loss of sig-
nal, the limiting amplifier (and all downstream devices)
does not respond to input noise or corrupt data.
Connect SQUELCH to GND or leave it unconnected to
disable squelch. Connect SQUELCH to VCC to enable
data squelching.
Applications Information
Program the LOS Threshold
Figure 2 provides information for selecting the LOS
threshold voltage (VTH). If R1 is 100k and if the
responsivities of the photodiode and preamplifier are
known, then the value of R2 can be selected from Figure
2 to provide LOS assert at the desired input power.
Select Capacitors
A typical MAX3964A/MAX3968 implementation requires
four external capacitors (CAZ, CFILTER, and two input
coupling capacitors). For all applications up to
266Mbps, Maxim recommends the following:
CAZ = 1F
CFILTER = 10nF
CIN = 4700pF
Wire Bonding
For high-current density and reliable operation, the
MAX3964A series uses gold metalization. Diepad size
is 4mils square with a 6mil pitch. Die thickness is
15mils.
0
20
80
60
40
120
100
-40
-36
-34
-38
-32
-30
-28
-26
OPTICAL INPUT POWER AT LOS ASSERT (dBm)
VALUE
OF
R2
(k
)
200kV/W
30kV/W
10kV/W
15kV/W
20kV/W
100kV/W
Figure 2. LOS Assert Programming Resistor vs. LOS Assert
Power (for Various PIN-TIA Gains )
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3964AETP+ | 功能描述:限幅放大器 3-5.5V 125-266Mbps Limiting Amp RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3964AETP+T | 功能描述:限幅放大器 3-5.5V 125-266Mbps Limiting Amp RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3964AETP-T | 功能描述:限幅放大器 3-5.5V 125-266Mbps Limiting Amp RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3964C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3964CEP | 制造商:Maxim Integrated Products 功能描述:+3.0V TO +5.5V, 125MBPS TO 266MBPS LINITING A - Bulk |
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