PC915 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
Manufacturer
PC915 Datasheet PDF : 7 Pages
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PC915
Test Circuit of Differential Gain vs. R E and Differential Phase vs. R E
9V
470 Ω
RE
PC915
2SA1029
+
Anode
2SA 2
AMP
100 µ F 1029 3
Vin 50 Ω 1.2
Cathode AGC
kΩ
7
6 VCC
5 VO
10 µ F
8C
+
9V
+
DG, DP
Tester
10 µ F
Vin Waveform
Superposition
wave 3.58MHz
0.067ms(1/15ms)
APL: Average Picture Level
s Application Example
VCC
9V
R1
470 Ω
RE
230 Ω
PC915
C1
Tr1
+
Anode
Tr2 2
AMP
100 µ F
Vin
Ri
1.2kΩ
75 Ω R2
3
Cathode
AGC
7
6 VCC
5 VO
8C
CC +
VCC
9V
VOUT
+
CO
10 µ F
10 µ F
Tr1 , T r2 : 2SA1029 or other same rank products
VOUT
=
2.3
is
IB
=
2.3
Vin
VCC-
VE
IB : DC flowed to infrared LED
is : AC flowed to infrared LED
VE : Emitter voltage of Tr2 (Between emitter and GND )
< Example of Circuit Setting >
( 1) Set for Gain
Gain is represented by the following formula ;
G = 2.3/ ( VCC -VE)
When using on condition that Gain = 1, set VCC -VE on 2.3V. So that R 1 and R 2 is determined.
( 2) Set for Input Resistance
Set Ri on output impedance ( usually 75 Ω ) of a mounting equipment.
( 3) Set for R E
When there is no signal ( input signal : 0) , set I LED flowed into infrared LED on 10 mA.
( 4) Set for Low Cut-off Frequency
Low cut-off frequency with C terminal capacitance, C C, is represented by the following
formula ;
f C= 100/C C( Hz ) ( CC : µ F value )
Then set Ci with input impedance of by-pass diode on as much value as possible on
condition that f C>1/ ( 2 π CiR ) [R = R 1R2/ ( R1+ R2) ]
s Precautions for Use
( 1) It is recommended that a by-pass capacitor of more than 0.01 µ F is added between V CC
and GND near the device in order to stabilize power supply line.
( 2) Handle this product the same as with other integrated circuits against static electricity.
( 3) As for other general cautions, refer to the chapter “ Precautions for Use ”
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