Datasheet > S7848

S7848

更新时间： 2022-11-26 04:29:27

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
16页	1288K
描述
POSITION SENSITIVE DETECTOR

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中文翻译

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数据手册

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S7848 数据手册

Characteristic and use

Figure 3-1 Structure chart, equivalent circuit (duo-lateral type PSD)

Figure 3-4 Active area chart (tetra-lateral type PSD)

CATHODE (Y2)

ANODE (X1)

C Rsh

ANODE (X2)

CATHODE (Y1)

: CURRENT GENERATOR

: IDEAL DIODE

: JUNCTION CAPACITANCE

Rsh: SHUNT RESISTANCE

Rp : POSITIONING RESISTANCE

ACTIVE AREA

KPSDC0007EA

KPSDC0011EA

Position conversion formula (See Figure 3-4.)

Figure 3-2 Active area chart (duo-lateral type PSD)

IX2 - IX1

........ (3-3)

........ (3-4)

X1 + IX2

Y2 - IY1

Y1 + IY2

3-3 Pin-cushion type (improved tetra-lateral type) PSD

This is a variant of the tetra-lateral type PSD with an im-

proved active area and reduced interaction between elec-

trodes. In addition to the advantages of small dark current,

high-speed response and easy application of reverse bias

that the tetra-lateral type offers, the circumference distor-

tion has been greatly reduced. The light input position of

the pin-cushion type shown in Figure 3-6 is calculated from

conversion formulas (3-5) and (3-6), which are different

from those for the duo-lateral and tetra-lateral types.

ACTIVE AREA

KPSDC0011EA

Position conversion formula (See Figure 3-2.)

X2 - IX1

........ (3-1)

........ (3-2)

X1 + IX2

Y2 - IY1

Y1 + IY2

Figure 3-5 Structure chart, equivalent circuit (pin-cushion type PSD)

ANODE (Y2)

ANODE (X1)

ANODE (X2)

3-2 Tetra-lateral type PSD

ANODE (Y1)

Rsh

CATHODE

The tetra-lateral type has four electrodes on the upper

surface, formed along each of the four edges. Photocur-

rent is divided into 4 parts through the same resistive

layer and extracted as position signals from the four

electrodes. Compared to the duo-lateral type, interaction

between the electrodes tends to occur near the corners

of the active area, making position distortion larger. But

the tetra-lateral type features an easy-to-apply reverse

bias voltage, small dark current and high-speed re-

sponse. The light input position for the tetra-lateral type

shown in Figure 3-4 is given by conversion formulas (3-

3) and (3-4), which are the same as for the duo-lateral

type.

Rsh

: CURRENT GENERATOR

: IDEAL DIODE

: JUNCTION CAPACITANCE

: SHUNT RESISTANCE

: POSITIONING RESISTANCE

KPSDC0009EA

Figure 3-6 Active area chart (pin-cushion type PSD)

Figure 3-3 Structure chart, equivalent circuit (tetra-lateral type PSD)

ANODE (Y2)

ANODE (X

ACTIVE AREA *

Rsh

ANODE (X

ANODE (Y

* Active area is specified at the inscribed square.

CATHODE

KPSDC0012EA

Position conversion formula (See Figure 3-6.)

: CURRENT GENERATOR

: IDEAL DIODE

: JUNCTION CAPACITANCE

(IX2 + IY1) - (IX1 + IY2

)

........ (3-5)

........ (3-6)

X1 + IX2 + IY1 + IY2

(IX2 + IY2) - (IX1 + IY1

X1 + IX2 + IY1 + IY2

Rsh: SHUNT RESISTANCE

Rp : POSITIONING RESISTANCE

)

KPSDC0008EA

1...6 7 8910 11 12...16

中文翻译

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与S7848相关器件

型号	品牌	获取价格	描述	数据表
S7848-01	ETC	获取价格	POSITION SENSITIVE DETECTOR
S7861	HAMAMATSU	获取价格	Receiver, 1250Mbps, TO-18, Through Hole Mount, TO-18, 4 PIN
S7861-02	HAMAMATSU	获取价格	Receiver, 1250Mbps, TO-18, Through Hole Mount, TO-18, 4 PIN
S7878	HAMAMATSU	获取价格	Si photodiode High sensitivity X-ray detector
S7879	ETC	获取价格	POSITION SENSITIVE DETECTOR
S78D120D	KODENSHI	获取价格	Low Dropout Voltage Regulator
S78D120PI	KODENSHI	获取价格	Low Dropout Voltage Regulator
S78D120Q	KODENSHI	获取价格	Low Dropout Voltage Regulator
S78D15D	KODENSHI	获取价格	Low Dropout Voltage Regulator
S78D15PI	KODENSHI	获取价格	Low Dropout Voltage Regulator

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