UPC2776TB_1 NEC [NEC], UPC2776TB_1 Datasheet - Page 5

• Manufacturer Part Number: UPC2776TB_1
• Description: 5 V, SUPER MINIMOLD SILICON MMIC MEDIUM OUTPUT POWER AMPLIFIER
• Manufacturer: NEC [NEC]

TEST CIRCUIT
COMPONENTS OF TEST CIRCUIT
FOR MEASURING ELECTRICAL
CHARACTERISTICS
INDUCTOR FOR THE OUTPUT PIN
transistor, connect an inductor between the Vcc pin (pin 6) and output pin (pin 4). Select large value inductance, as
listed above.
voltage drop to output enable high level. In terms of AC, the inductor make output-port-impedance higher to get
enough gain. In this case, large inductance and Q is suitable.
peak in the operating frequency band, and suppressed at lower frequencies.
above.
CAPACITORS FOR THE V
for the input and output pins.
can be supplied against Vcc fluctuation.
impedance. Their capacitance are therefore selected as lower impedance against a 50 Ω load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
10 MHz operation, increase the value of coupling capacitor such as 10 000 pF. Because the coupling capacitors are
determined by equation, C = 1/(2πRfc).
The internal output transistor of this IC consumes 20 mA, to output medium power. To supply current for output
The inductor has both DC and AC effects. In terms of DC, the inductor biases the output transistor with minimum
For above reason, select an inductance of 100 Ω or over impedance in the operating frequency. The gain is a
The recommendable inductance can be chosen from example of actual application components list as shown
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the Vcc pin and the coupling capacitors
The bypass capacitor connected to the Vcc pin is used to minimize ground impedance of Vcc pin. So, stable bias
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
To obtain a flat gain from 100 MHz upwards, 1 000 pF capacitors are used in the test circuit. In the case of under
C
1
C
, C
L
3
2
Capacitor
Bias Tee
Bias Tee
Type
IN
1 000 pF
1 000 nH
1 000 pF
50 Ω
Value
CC
, INPUT, AND OUTPUT PINS
1 000 pF
C
1
1
Data Sheet P12680EJ3V0DS
1 000 pF
EXAMPLE OF ACTUAL APPLICATION COMPONENTS
C
3
C
1
to C
6
L
3
V
2, 3, 5
CC
Chip capacitor
Chip inductor
4
Type
1 000 pF
L
C
2
1 000 pF
300 nH
100 nH
Value
10 nH
50 Ω
OUT
Operating Frequency
100 MHz or higher
100 MHz or higher
1.0 GHz or higher
10 MHz or higher
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5