UPC2708TB_1 NEC [NEC], UPC2708TB_1 Datasheet - Page 6

• Manufacturer Part Number: UPC2708TB_1
• Description: 5 V, SUPER MINIMOLD SILICON MMIC MEDIUM OUTPUT POWER AMPLIFIER
• Manufacturer: NEC [NEC]

TEST CIRCUIT
INDUCTOR FOR THE OUTPUT PIN
transistor, connect an inductor between the V
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.
CAPACITORS FOR THE V
the input and output pins.
can be supplied against V
impedance. Their capacitance are therefore selected as lower impedance against a 50
perform as high pass filters, suppressing low frequencies to DC.
10 MHz operation, increase the value of coupling capacitor such as 10000 pF. Because the coupling capacitors are
determined by equation, C = 1/(2 Rfc).
6
COMPONENTS OF TEST CIRCUIT
FOR MEASURING ELECTRICAL
CHARACTERISTICS
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
Capacitors of 1000 pF are recommendable as the bypass capacitor for the V
The bypass capacitor connected to the V
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, 1000 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
CC
CC
IN
1 000 nH
1 000 pF
1 000 pF
fluctuation.
, INPUT AND OUTPUT PINS
50
Value
1 000 pF
C
1
CC
CC
Data Sheet P13442EJ3V0DS00
1
pin is used to minimize ground impedance of V
EXAMPLE OF ACTURAL APPLICATION COMPONENTS
pin (pin 6) and output pin (pin 4). Select large value inductance, as
1 000 pF
C
C
1
3
to C
L
6
V
3
CC
2, 3, 5
Chip Capacitor
Chip Inductor
4
Type
1 000 pF
L
C
2
1 000 pF
CC
300 nH
100 nH
10 nH
Value
50
pin and the coupling capacitors for
OUT
load. The capacitors thus
Operating Frequency
CC
100 MHz or higher
100 MHz or higher
1.0 GHz or higher
10 MHz or higher
pin. So, stable bias
PC2708TB