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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)： | 3/16頁 |
| 文件大?。?/td> | 1289K |
| 代理商： | PSD6407 |
8
The position detection error is usually measured with a
light beam of
φ200 m, so the specified areas shown in
Figures 4-4 to 4-6 are used for position detection error.
Position detection error for two-dimensional PSDs is sep-
arately measured in two areas: Zone A and Zone B. Two
zones are used because position detection error in the
circumference is larger than that in the center of the ac-
tive area,
Zone A: Within a circle with a diameter equal to 40 % of
one side length of the active area.
Zone B: Within a circle with a diameter equal to 80 % of
one side length of the active area.
Figure 4-4 Specific area for one-dimensional PSD position
detection error (resistance length
≤ 12 mm)
Figure 4-5 Specific area for one-dimensional PSD position
detection error (resistance length > 12 mm)
Figure 4-6 Specific area for two-dimensional PSD
position detection error
KPSDC0063EA
KPSDC0074EA
KPSDC0075EA
Figure 5-1 Basic connection example of one-dimensional
PSD and current-to-voltage conversion type
operational amplifier
KPSDC0076EA
Position resolution is the minimum detectable displace-
ment of a spot light incident on PSD, expressed as a dis-
tance on the PSD surface. Resolution is determined by the
PSD resistance length and the S/N. Using formula (1-6) as
an example, the following equation can be established.
In cases where the positional displacement is infinitely
small, the noise component contained in the output current
IX2 clearly determines the position resolution. Generally, if
the PSD noise current is In, then the position resolution
R
is given as follows:
Figure 5-1 shows the basic connection example when us-
ing a PSD in conjunction with current-to-voltage amplifiers.
The noise model for this circuit is shown in Figure 5-2.
x: Small displacement
I: Change in output current
Then,
x can be expressed by the following equation.
IX2 +
I =
. Io ......... (5-1)
XB +
x
LX
x = LX .
........................... (5-2)
I
Io
R = LX .
.......................... (5-3)
In
Io
Characteristic and use
5. Position resolution
Io : Photocurrent
ID : Dark current
Rie: Interelectrode resistance
Cj : Junction capacitance
Rf : Feedback resistance
Cf : Feedback capacitance
en : Equivalent noise input voltage of operational amplifier
in : Equivalent noise input current of operational amplifier
Vo : Output voltage
KPSDC0077EA
Figure 5-2 Noise model
SPECIFIED RANGE
LX × 0.75
RESISTANCE LENGTH LX
OUTPUT
ELECTRODE 1
OUTPUT
ELECTRODE X2
ACTIVE AREA
SPECIFIED RANGE
LX × 0.90
RESISTANCE LENGTH LX
OUTPUT
ELECTRODE X1
OUTPUT
ELECTRODE X2
ACTIVE AREA
ZONE B
ZONE A
Rf
Cf
PSD
-
+
-
+
Rf
Cf
A
VR
~
-
+
Rf
Cf
in
en
A
Vo
PSD
IO
ID
Rie
Cj
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| 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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