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UPC3225TB Fiches technique(PDF) 6 Page - California Eastern Labs

No de pièce UPC3225TB
Description  BIPOLAR ANALOG INTEGRATED CIRCUIT
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Fabricant  CEL [California Eastern Labs]
Site Internet  http://www.cel.com
Logo CEL - California Eastern Labs

UPC3225TB Fiches technique(HTML) 6 Page - California Eastern Labs

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TEST CIRCUIT
1
2
3
6
5
4
C1
330 pF
C3
1 000 pF
L1
15 nH
C4
1 000 pF
VCC
C2
100 pF
50
OUT
GND
GND
GND
IN
VCC
The application circuits and their parameters are for reference only and are not intended for use in actual design-ins.
COMPONENTS OF TEST CIRCUIT FOR MEASURING
ELECTRICAL CHARACTERISTICS
Value
Maker
Type code
C1
330 pF
Murata
GMR36CH
C2
100 pF
Murata
GMR36CH
C3
1 000 pF
Murata
GMR39CH
C4
1 000 pF
Murata
GMR36B
L1
15 nH
Susumu
TFL0816
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC consumes 24.5 mA, to output medium power. To supply current for output
transistor, connect an inductor between theVCC pin (pin 3) and output pin (pin 1). Select inductance, as the value
listed above.
The inductor has both DC and AC effects. In terms of DC, the inductor biases the output transistor with minimum
voltage drop to output enable high level. In terms of AC, the inductor makes output-port impedance higher to get
enough gain. In this case, large inductance and Q is suitable.
CAPACITORS FOR THE VCC, INPUT AND OUTPUT PINS
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the VCC pin. Capacitors of 330 pF for the
input pin and 100 pF for the output pin are recommendable as the coupling capacitors.
The bypass capacitor connected to the VCC pin is used to minimize ground impedance of VCC pin. So, stable bias
can be supplied against VCC fluctuation.
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
impedance. Their capacitances are therefore selected as lower impedance against a 50
load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
Data Sheet PU10500EJ01V0DS
6
UPC3225TB


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