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UPC2749TB
PIN DESCRIPTION
Pin
Pin
Applied
Pin
No.
Name
Voltage
Voltage
Description
Internal Equivalent Circuit
(V)
(V)
1
Input
–
0.82
Signal input pin. An internal matching
circuit, configured with resistors, enables
50 ? connection over a wide bandwidth.
A multi-feedback circuit is designed to
cancel the deviations of h FE and resistance.
This pin must be coupled to the signal source
with a blocking capacitor.
6
V CC
4
Output
–
2.87
Signal output pin. An internal matching
4
OUT
circuit, configured with resistors, enables
50 ? connection over a wide bandwidth.
This pin must be coupled to the output
load with a blocking capacitor.
IN
1
6
V CC
2.7 to 3.3
–
Power supply pin. This pin should be
externally equipped with a bypass capacitor
to minimize ground impedance.
3
GND
2
GND
5
2
GND
0
–
Ground pins. These pins should be connected
3
5
to system ground with minimum inductance.
Ground pattern on the board should be
formed as wide as possible. All the ground
pins must be connected together with wide
ground pattern to minimize impedance
difference.
SYSTEM APPLICATION EXAMPLE
Example of GPS Receiver
Pre Amp. Unit
BPF
RF Amp.
BPF
Mixer
IF Amp.
IF Filter
LNA
UPC2749TB
UPC2749TB
VCO
Loop Filter
PLL
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