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參數(shù)資料
| 型號： | MAX3945ETE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP LIMITING 3.3V LP 16TQFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | 限幅放大器 |
| 應用： | 光纖學網(wǎng)絡 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 16-TQFN-EP（3x3） |
| 包裝： | 管件 |
______________________________________________________________________________________ 15
MAX3945
1.0625Gbps to 11.3Gbps,
SFP+ Dual-Path Limiting Amplifier
LOS Circuitry
The LOS circuitry has two operational modes controlled
by the LOS1_EN and LOS2_EN bits (see Table 8). In the
first mode, the LOS block detects the differential ampli-
tude of the input signal and compares it against a preset
threshold controlled by the 6-bit SET_LOS register. In
the second mode, the LOS block compares the voltage
at the RPMIN pin to a preset threshold also controlled by
the 6-bit SET_LOS register. The second mode enables
low-power LOS detection based on average photodiode
current.
The LOS assert threshold is approximately 1.5mVP-P x
SET_LOS[5:0]. The LOS deassert level is approximately
1.6 times the assert level to avoid LOS chatter. LOS
polarity, squelch, and LOS masking time are unaffected
by the selection of LOS1_EN or LOS2_EN.
Programmable LOS Output Masking Time
This feature masks false input signals that can occur
after a loss-of-light event in a fiber optic link. These false
input signals, caused by some transimpedance amplifier
implementations, can corrupt the LOS output and cause
system-level link diagnostic errors.
The LOS output masking time can be programmed from 0
to 4500Fs in 35Fs steps using the 7-bit SET_LOSTIMER[6:0]
register. The output mask timer is initiated on the first
transition of the LOS signal and prevents any further
changes in the LOS output signal until the end of the
programmed LOS timing period. The LOS output mask-
ing time should be carefully chosen to extend beyond
any expected input glitch. Figure 3 shows the LOS signal
changing after approximately 800Fs to a change in the
input signal where the LOS output masking time function
is not used. Figure 4 shows masking of the LOS signal
by the LOS output masking time function to a change in
the input signal.
Table 8. LOS Control
Figure 3. LOS Response to a Short Burst of Input Signal
Figure 4. LOS Response to a Short Burst of Input Signal (Any
changes in LOS are masked until the end of the LOS masking
period.)
400s/div
50mV/div
2mV/div
400s/div
50mV/div
2mV/div
LOS2_EN
LOS1_EN
OPERATION MODE DESCRIPTION
0
LOS circuitry is disabled and powered down
X
1
LOS circuitry is enabled and Rx input amplitude is detected
1
0
LOS circuitry is enabled and RPMIN input amplitude is detected
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3945ETE+ | 功能描述:限幅放大器 1.0625-11.3Gbps SFP Dual-Path Limit Amp RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| MAX3945ETE+T | 功能描述:限幅放大器 1.0625-11.3Gbps SFP Dual-Path Limit Amp RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| MAX3945EVKIT | 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX3945EVKIT+ | 功能描述:限幅放大器 Evaluation Kit for the MAX3945 RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| MAX3946ETG+ | 功能描述:激光驅(qū)動器 1.0625-11.3Gbps SFP Dual-Path Limit Amp 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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