BBA-322-A_08 Datasheet, PDF (3/7 Pages) List of Unclassifed Manufacturers – BBA SERIES RF AMPLIFIER DATA GUIDE

PERFORMANCE DATA
These performance parameters
are based on module operation at
25°C from a 5.0VDC supply with a
-50dBm input unless otherwise
noted. Figure 2 illustrates the
connections necessary for testing
and operation. It is recommended
all ground pins be connected to the
ground plane.
VCC
1 _{GND RF OUT} 8
2 _VCC
GND ⁷
3 _GND
GND ⁶
4 _{RF IN GND} 5
GND
BBA-519-A
GND
Figure 2: Test / Basic Application Circuit
PIN ASSIGNMENTS
1 GND RF OUT 8
2 VCC
GND 7
3 GND
GND 6
4 RF IN GND 5
Figure 3: BBA Series Amplifier Pinout (Top View)
PIN DESCRIPTIONS
Pin #
1
2
3
Name
GND
V_CC
GND
Description
Analog Ground
Supply Voltage
Analog Ground
4
RF IN
50-ohm RF Input
5
GND
Analog Ground
6
GND
Analog Ground
7
GND
Analog Ground
8
RF OUT
50-ohm RF Output
Table 1: BBA Series Amplifier Pin Descriptions
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THEORY OF OPERATION
The BBA Series is a family of low-cost, high-performance, broadband RF
amplifiers. They utilize an advanced Gallium Arsenide Heterojunction Bipolar
Transistor (HBT) gain stage, which yields high gain and IP3, excellent flatness,
and low noise. They are self-contained with 50Ω input and output impedances
and require only one external DC biasing resistor to operate as specified.
The BBA-322-A is the high gain model and is suitable for the LNA stage of many
receivers. This extra gain stage on the front end of a receiver can improve the
sensitivity and provide a greater range for the product.
The BBA-519-A is the high power model and is suitable for the final gain stage
in a transmitter. This amplifier can boost the output power of a transmitter to
much higher levels and provide a significant increase in range (where legally
appropriate).
VCC
RF IN
RF OUT
GND
Figure 4: BBA Series Amplifier Schematic
OPERATIONAL CONSIDERATIONS
The use of a gain stage can produce a significant increase in the range
performance of an RF link. It is important to note that it can also introduce
detrimental effects, such as the following:
• Amplification of harmonics and LO along with the fundamental carrier frequency.
• Adverse effect on the front-end noise figure on receivers.
• Potential damage if the receiver input is not capable of accommodating high
input power levels.
• Risk of generating illegal power levels and unacceptable interference.
It is up to the designer to ensure that the final product will comply with all
appropriate regulations in the county of intended use.
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