UPC2710TB データシートの表示（PDF） - California Eastern Laboratories.
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UPC2710TB Datasheet PDF : 13 Pages
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UPC3226TB
TEST CIRCUIT
VCC
C4
1 000 pF
1 000 pF
C3
6
50 Ω
IN
C1
1
100 pF
L 100 nH
4
C2
50 Ω
OUT
100 pF
2, 3, 5
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
Type
Value
C1, C2
Chip Capacitor
100 pF
C3
Chip Capacitor
1 000 pF
C4
Feed-through Capacitor
1 000 pF
L
Chip Inductor
100 nH
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC, 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 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 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 capacitances are therefore selected as lower impedance against a 50 Ω 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/(2 πRfc).
Data Sheet PU10558EJ01V0DS
5
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