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參數(shù)資料
| 型號(hào)： | OPT211 |
| 英文描述： | MONOLITHIC PHOTODIODE AND AMPLIFIER |
| 中文描述： | 整體式光電二極管與放大器 |
| 文件頁(yè)數(shù)： | 9/9頁(yè) |
| 文件大?。?/td> | 116K |
| 代理商： | OPT211 |
OPT211
9
Best signal-to-noise ratio is achieved by using the highest
practical feedback resistor. This comes with the trade-off of
decreased bandwidth.
The noise performance of a photodetector is sometimes
characterized by its
noise effective power
(NEP). This is the
radiant power which would produce an output signal equal
to the output noise level. NEP has the units of radiant
power (W). A NEP curve is provided.
LIGHT SOURCE POSITIONING
The OPT211 is 100% tested with a light source that uniformly
illuminates the full area of the integrated circuit, including
the op amp. Although all IC amplifiers are light-sensitive to
some degree, the OPT211 op amp circuitry is designed to
minimize this effect. Sensitive junctions are shielded with
metal, and differential stages are cross-coupled. Furthermore,
the photodiode area is very large relative to the op amp input
circuitry making these effects negligible.
If your light source is focused to a small area, be sure that
it is properly aimed to fall on the photodiode. If a narrowly
focused light source were to miss the photodiode area and
fall only on the op amp circuitry, the OPT211 would not
perform properly. The large (0.090 inch
x
0.090 inch)
photodiode area allows easy positioning of narrowly focused
light sources. The photodiode area is easily visible as it
appears very dark compared to the surrounding active
circuitry.
The incident angle of the light source also affects the
apparent sensitivity in uniform irradiance. For small incident
angles, the loss in sensitivity is simply due to the smaller
effective light gathering area of the photodiode (proportional
to the cosine of the angle). At a greater incident angle, light
is diffracted and scattered by the side of the package. These
effects are shown in the typical performance curve
“Responsivity vs Incident Angle.”
LINEARITY PERFORMANCE
The photodiode inside the OPT211 is designed to be operated
in the photoconductive mode (V
DIODE
= 0V) for very linear
operation with radiant power throughout a wide range.
Nonlinearity remains below approximately 0.05% up to
100
μ
A photodiode current.
This very linear performance at high radiant power assumes
that the full photodiode area is uniformly illuminated. If the
light source is focused to a small area of the photodiode,
nonlinearity will occur at lower radiant power.
FIGURE 5. Low Pass Filter for Improved Signal-to-Noise Ratio.
OPA131
2.94k
21k
2.2nF
Sallen-Key Low Pass Filter Designed
Using Burr-Brown’s Application Bulletin No. AB-034
470pF
f
–3dB
= 20kHz
6
2
3
V
O
Sallen-Key
2-Pole Butterworth
OPT211
7
8
3
1
5
2
V–
V+
λ
R
F
=
10M
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPT211 | Monolithic Photodiode And Amplifier(單片光電二極管和放大器) |
| OPT301 | INTEGRATED PHOTODIODE AND AMPLIFIER |
| OPT301M | INTEGRATED PHOTODIODE AND AMPLIFIER |
| OPTA01 | Programmable Bar Code Decode ICs |
| Option 010 | Subminiature Right Angle LED Indicators(超小型直角 LED指示器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPT211P-J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| OPT-25W | 制造商:NIHON 功能描述: |
| OPT3001DNPR | 功能描述:Optical Sensor Ambient 550nm I2C 6-UDFN Exposed Pad 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:環(huán)境 波長(zhǎng):550nm 接近探測(cè):無 輸出類型:I2C 電壓 - 電源:1.6 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UDFN 裸露焊盤 供應(yīng)商器件封裝:6-USON（2x2） 標(biāo)準(zhǔn)包裝:1 |
| OPT3001DNPT | 功能描述:Optical Sensor Ambient 550nm I2C 6-UDFN Exposed Pad 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:環(huán)境 波長(zhǎng):550nm 接近探測(cè):無 輸出類型:I2C 電壓 - 電源:1.6 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UDFN 裸露焊盤 供應(yīng)商器件封裝:6-USON（2x2） 標(biāo)準(zhǔn)包裝:1 |
| OPT3001EVM | 功能描述:OPT3001 - Light, Ambient Sensor Evaluation Board 制造商:texas instruments 系列:- 零件狀態(tài):有效 傳感器類型:環(huán)境光 感應(yīng)范圍:- 接口:I2C 靈敏度:550nm 電壓 - 電源:1.6 V ~ 3.6 V 嵌入式:- 所含物品:2 板，線纜 使用的 IC/零件:OPT3001 標(biāo)準(zhǔn)包裝:1 |
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