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參數(shù)資料
| 型號(hào)： | MAX3271 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | +3.3V, 2.5Gbps Low-Power Transimpedance Amplifier |
| 中文描述： | +3.3V、2.5Gbps低功耗互阻放大器 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 558K |
| 代理商： | MAX3271 |
M
DC Cancellation Circuit
The direct current (DC) cancellation circuit uses low-
frequency feedback to remove the DC component of
the input signal. This feature centers the input signal
within the transimpedance amplifier
’
s linear range,
thereby reducing pulse-width distortion caused by
large input signals (Figure 3).
The DC cancellation circuit is internally compensated
and therefore does not require external capacitors. This
circuit minimizes pulse-width distortion for data
sequences that exhibit a 50% mark density. A mark
density significantly different from 50% will cause the
MAX3271 to generate pulse-width distortion.
DC cancellation current is drawn from the input and
creates noise. For low-level signals with little or no DC
component, this is not a problem. Amplifier noise will
increase slightly for signals with significant DC compo-
nent.
Applications Information
Optical Power Relations
Many of the MAX3271 specifications relate to the input
signal amplitude. When working with fiber optic
receivers, the input is sometimes expressed in terms of
average optical power and extinction ratio. Figure 4
shows relations that are helpful for converting optical
power to input signal when designing with the MAX3271.
Optical power relations are shown in Table 1; the defini-
tions are true if the average duty cycle of the input data
is 50%.
Optical Sensitivity Calculation
The input-referred RMS noise current (I
N
) of the
MAX3271 generally determines the receiver sensitivity.
To obtain a system bit error rate (BER) of 1E-12, the
SNR ratio must always exceed 14.1. The input sensitivi-
ty, expressed in average power, can be estimated as:
where
ρ
is the photodiode responsivity in A/W.
Input Optical Overload
The overload is the largest input that the MAX3271
accepts while meeting specifications. The optical over-
load can be estimated in terms of average power with
the following equation:
Overload
mA
2
2
dBm
log
=
10
1000
ρ
Sensitivity
I
r
r
dBm
N
(
e
e
=
+
)
(
)
10
14.
1
2
1
1000
log
ρ
+3.3V, 2.5Gbps Low-Power
Transimpedance Amplifier
6
_______________________________________________________________________________________
AMPLITUDE
OUTPUT (LARGE SIGNALS)
TIME
OUTPUT (SMALL SIGNALS)
Figure 2. MAX3271 Limited Output
AMPLITUDE
INPUT FROM PHOTODIODE
TIME
INPUT AFTER DC CANCELLATION
Figure 3. DC Cancellation Effect on Input
P0
P1
P
AVG
TIME
O
Figure 4. Optical Power Relations
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3271D | +3.3V, 2.5Gbps Low-Power Transimpedance Amplifier |
| MAX3271E | +3.3V, 2.5Gbps Low-Power Transimpedance Amplifier |
| MAX3271W | +3.3V, 2.5Gbps Low-Power Transimpedance Amplifier |
| MAX3280EAUK-T | Circular Connector; No. of Contacts:2; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:10SL; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:10SL-4 RoHS Compliant: No |
| MAX3280 | 【15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23 RS-485/RS-422 True Fail-Safe Receivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3271E/D | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX3271E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3271EVKIT | 功能描述:交換機(jī) IC 開發(fā)工具 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:USB Power Switches 工具用于評(píng)估:MAX4984E 工作電源電壓:2.8 V to 5.5 V |
| MAX3272AEGP | 功能描述:限幅放大器 3.3V 2.5Gbps Limiting Amplifier 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 |
| MAX3272AEGP-T | 功能描述:限幅放大器 3.3V 2.5Gbps Limiting Amplifier 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 |
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