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參數(shù)資料
| 型號： | PSD6407 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | POSITION SENSITIVE DETECTOR |
| 中文描述： | 位置靈敏探測器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 1289K |
| 代理商： | PSD6407 |
11
Photocurrent saturation must be taken into account when a
PSD is used outdoors, in locations where the background
light level is high, or the signal light amount is extremely
large. Figure 7-1 shows typical photocurrent output of a
PSD in a non-saturated state. This PSD is operating nor-
mally with good output linearity over the entire active area.
If the background light level is excessively high or the sig-
nal light amount is extremely large, the PSD photocurrent
will saturate. A typical output from a saturated PSD is
shown in Figure 7-2. The output linearity of the PSD is im-
paired so the correct position cannot be detected in this
case.
Photocurrent saturation of a PSD depends on the interelec-
trode resistance and reverse voltage, as shown in Figure 7-
3. The saturated photocurrent is measured as the total
photocurrent of a PSD when the entire active area is illumi-
nated. If a small spot light is focused on the active area, the
photocurrent that is generated is concentrated only on a lo-
calized portion, so saturation occurs at a lower level.
To avoid the saturation effect, use the following methods.
Reduce the background light level by using an optical filter.
Use a PSD with a small active area.
Increase the reverse voltage.
Decrease the interelectrode resistance.
Avoid concentrating the light beam on a small area.
Figure 7-3 Saturation photocurrent vs. interelectrode resistance
(entire active area fully illuminated)
KPSDB0085EA
KPSDB0086EA
Figure 7-2 Photocurrent output example of saturated
PSD (S5629)
Characteristic and use
7. Saturation photocurrent
KPSDB0087EA
Figure 7-1 Photocurrent output example of PSD in
normal operation (S5629)
INCIDENT POSITION (mm)
(Ta=25 C)
RELATIVE
PHOTOCURRENT
(%)
-2
-4
0
20
40
120
100
80
60
02
-1
-3
1
3
4
IX1
IX2
IX1 + IX2
CENTER OF
ELECTRICITY
INCIDENT POSITION (mm)
(Ta=25 C)
RELATIVE
PHOTOCURRENT
(%)
-2
-4
0
20
40
120
100
80
60
02
-1
-3
1
3
4
IX1
IX2
IX1 + IX2
IX2
CENTER OF
ELECTRICITY
INTERELECTRODE RESISTANCE (k
)
(Typ. Ta=25 C)
100
10
0.01
0.1
10
1
1000
SATURATION
PHOTOCURRENT
(A)
VR=5 V
VR=2 V
VR=1 V
VR=0 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD6481212 | 制造商:TDK-Lambda Corporation 功能描述:DC/DC,DUAL-OUT,12/-12V,0.25/-0.25A,6W - Bulk |
| PSD6-48-1212 | 功能描述:DC/DC轉(zhuǎn)換器 6W 12V 0.25A RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PSD6481212/S | 制造商:TDK-Lambda Corporation 功能描述:DC/DC,DUAL-OUT,12/-12V,0.25/-0.25A,6W - Bulk |
| PSD6-48-1212/S | 功能描述:DC/DC轉(zhuǎn)換器 6W 12V 0.25A RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PSD6-48-1212-HFP | 制造商:TDK-Lambda Corporation 功能描述:6W,36-76VDC,+/-12V@0.25A,1.12" X 0.8" X 0.31", HAZMAT - Bulk |
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