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參數(shù)資料
| 型號(hào)： | S7858 |
| 元件分類： | 光電元器件 |
| 英文描述： | LOGIC OUTPUT PHOTO DETECTOR |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 126K |
| 代理商： | S7858 |
Features
l Switchable gain function (6 or 20)
l Photo IC for fast printing
l High sensitivity
l Stable output versus laser power or temperature variations
Applications
l Print start timing detection for laser printers, digital copiers,
fax machines, etc.
PHOTO
IC
Photo IC for laser beam synchronous detection
Photo IC with switchable internal amplifier gain
S7858
S7858 uses a dual-element PIN photodiode and compares the two photocurrent signals to maintain a highly stable output even when input laser
power or ambient temperature fluctuates. The internal amplifier gain is switchable with changes in the input laser power.
s Absolute maximum ratings (Ta=25 °C, Vcc1=Vcc2=Vcc)
Parameter
Symbol
Value
Unit
Supply voltage
Vcc
-0.5 to +7
V
Power dissipation *
1
P
150
mW
External input voltage
Vext
-0.5 to +Vcc+0.5
V
Output voltage
Vo
-0.5 to Vcc
V
Output current
Io
20
mA
RO1, RO2 terminal current
IRO
5
mA
Operating temperature
Topr
-25 to +80
°C
Storage temperature
Tstg
-40 to +85
°C
Soldering
-
230 °C, 5 s
-
*1: Derate power dissipation at a rate of -2 mW/°C above Ta=25 °C.
s Electrical and optical characteristics (Ta = 25
°C, λ=780 nm, Vcc1=Vcc2=Vcc=5 V, Ro1=Ro2=5. 1 k, unless otherwise noted)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
High level output voltage
VOH
PI=0
4.9
-
V
Low level output voltage
VOL
PI=140 W, at Vext=L
PI=40 W, at Vext=H
IOL=10 mA
-
0.4
0.6
V
High level current consumption
ICCH
PI=0
-
4
7
mA
Low level current consumption
ICCL
PI=140 W, at Vext=L
PI=40 W, at Vext=H
-
6
9
mA
Threshold input power 1
PTH
Vext=L
25
35
45
W
Threshold input power 2
PTH
Vext=H
7
10
13
W
H
→L propagation delay time
tPHL
PI=200 W center, at Vext=L
PI=60 W center, at Vext=H
PI=±10 % *2
--
±10
ns
Rise time
tr
-
60
180
ns
Fall time
tf
RL=510
, CL=15 pF
-
20
100
ns
*2: Beam diameter
φ (1/e2) =100 m, scan speed=0.5 mm/s
Not including jitter caused by polygon mirror non-uniformity, etc.
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