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參數(shù)資料
| 型號(hào)： | OPT101P |
| 元件分類： | 跨阻放大器 |
| 英文描述： | MONOLITHIC PHOTODIODE AND SINGLE-SUPPLY TRANSIMPEDANCE AMPLIFIER |
| 中文描述： | 整體式光電二極管和單電源互阻抗放大器 |
| 文件頁(yè)數(shù)： | 10/11頁(yè) |
| 文件大?。?/td> | 165K |
| 代理商： | OPT101P |
OPT101
10
LIGHT SOURCE POSITIONING
The OPT101 is tested with a light source that uniformly
illuminates the full area of the integrated circuit, including
the op amp. Although IC amplifiers are light-sensitive to
some degree, the OPT101 op amp circuitry is designed to
minimize this effect. Sensitive junctions are shielded with
metal, and the photodiode area is very large relative to the op
amp input circuitry.
If your light source is focused to a small area, be sure that
it is properly aimed to fall on the photodiode. A narrowly
focused beam falling on only the photodiode will provide
improved settling times compared to a source that uniformly
illuminates the full area of the die. If a narrowly focused
light source were to miss the photodiode area and fall only
on the op amp circuitry, the OPT101 would not perform
properly. The large 0.09"
x
0.09" (2.29mm
x
2.29mm)
photodiode area allows easy positioning of narrowly focus-
ed 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 effects 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 package. These effects are
shown in the typical performance curve “Responsivity vs
Incident Angle.”
DYNAMIC RESPONSE
Using the internal 1M
resistor, the dynamic response of
the photodiode/op amp combination can be modeled as a
simple R C circuit with a –3dB cutoff frequency of
approximately 14kHz. The R and C values are 1M
and
11pF respectively. By using external resistors, with less than
3pF parasitic capacitance, the frequency response can be
improved. An external 1M
resistor used in the configuration
shown in Figure 4b will create a 23kHz bandwidth with the
same 10
6
V/A dc transimpedance gain. This yields a rise time
of approximately 15
μ
s (10% to 90%). Dynamic response is
dynamic response oscilloscope photographs showing virtually
identical large-signal and small-signal response.
Dynamic response will vary with feedback resistor value as
shown in the typical performance curve “Responsivity vs
Frequency.” Rise time (10% to 90%) will vary according to
the –3dB bandwidth produced by a given feedback resistor
value:
0.35
t
r
=
where:
t
r
is the rise time (10% to 90%)
f
C
is the –3dB bandwidth
LINEARITY PERFORMANCE
The photodiode is operated in the photoconductive mode so
the current output of the photodiode is very linear with
radiant power throughout a wide range. Nonlinearity remains
below approximately 0.05% up to 100
μ
A photodiode current.
The photodiode can produce output currents of 1mA or
greater with high radiant power, but nonlinearity increases
to several percent in this region.
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.
f
C
FIGURE 5. Three-Wire Remote Light Measurement.
1M
OPT101
3pF
0.01 to
0.1μF
2
1
5
4
λ
8
3
V
B
8pF
+2.7 to
+36V
NOTE: Pin Numbers for DIP Package.
V
OUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPT101PG4 | 功能描述:光電二極管 Transimpedance Amp RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Photodiodes 反向電壓:10 V 最大暗電流:30 nA 峰值波長(zhǎng):565 nm 上升時(shí)間:3.1 us 下降時(shí)間:3 us 半強(qiáng)度角度:50 deg 封裝 / 箱體:TO-5 |
| OPT101P-J | 功能描述:光頻率和光電壓 Mon Photodiode & Sgl Supply Transimp Amp RoHS:否 制造商:ams 峰值波長(zhǎng):1000 nm 工作電源電壓:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風(fēng)格: 封裝 / 箱體: |
| OPT101P-JG4 | 功能描述:光電二極管 Mono Photodiode & Sngl-Sply Trans Amp RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Photodiodes 反向電壓:10 V 最大暗電流:30 nA 峰值波長(zhǎng):565 nm 上升時(shí)間:3.1 us 下降時(shí)間:3 us 半強(qiáng)度角度:50 deg 封裝 / 箱體:TO-5 |
| OPT101W | 制造商:BB 制造商全稱:BB 功能描述:MONOLITHIC PHOTODIODE AND SINGLE-SUPPLY TRANSIMPEDANCE AMPLIFIER |
| OPT-1250A1F1 | 制造商:DELTA 制造商全稱:Delta Electronics, Inc. 功能描述:RoHS Compliant 1X9 SC Duplex Receptacle Transceiver Module for Gigabit Ethernet |
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