UPC8182TB Ver la hoja de datos (PDF) - California Eastern Laboratories.
Número de pieza
componentes Descripción
Fabricante
UPC8182TB
California Eastern Laboratories.
UPC8182TB Datasheet PDF : 15 Pages
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TEST CIRCUITS
PC8182TB
COMPONENTS OF TEST CIRCUIT
FOR MEASURING ELECTRICAL
CHARACTERISTICS
C1, C2
C3
L
Type
Bias Tee
Capacitor
Bias Tee
Value
1 000 pF
1 000 pF
1 000 nH
EXAMPLE OF ACTUAL APPLICATION COMPONENTS
C1 to C3
L
Type
Chip capacitor
Chip inductor
Value
1 000 pF
100 nH
10 nH
Operating Frequency
100 MHz or higher
100 MHz or higher
2.0 GHz or higher
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC consumes 20 mA, to output medium power. To supply current for output
transistor, connect an inductor between the Vcc pin (pin 6) and output pin (pin 4). Select large value inductance, as
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.
For above reason, select an inductance of 100 or over impedance in the operating frequency. The gain is a
peak in the operating frequency band, and suppressed at lower frequencies.
The recommendable inductance can be chosen from example of actual application components list as shown
above.
CAPACITORS FOR THE VCC, INPUT, AND OUTPUT PINS
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the Vcc pin and the coupling capacitors
for the input and output pins.
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 capacitance are therefore selected as lower impedance against a 50 load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
To obtain a flat gain from 100 MHz upwards, 1 000 pF capacitors are used in the test circuit. In the case of under
10 MHz operation, increase the value of coupling capacitor such as 10 000 pF. Because the coupling capacitors are
determined by equation, C = 1/(2Rfc).
Data Sheet PU10206EJ01V0DS
7
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