BBA-322-A_08 Datasheet, PDF (4/7 Pages) List of Unclassifed Manufacturers – BBA SERIES RF AMPLIFIER DATA GUIDE

POWER SUPPLY REQUIREMENTS
The module does not have an internal voltage
regulator; therefore it requires a clean, well-regulated
Vcc TO
MODULE
power source. While it is preferable to power the unit
from a battery, the unit can also be operated from a _{Vcc IN}
10Ω
power supply as long as noise is less than 20mV.
Power supply noise can significantly affect the
10μF
performance; therefore, providing a clean power
supply for the module should be a high priority during
design.
Figure 5: Supply Filter
A 10Ω resistor in series with the supply followed by a 10µF tantalum capacitor
from V_CC to ground will help in cases where the quality of supply power is poor.
These values may need to be adjusted depending on the noise present on the
supply line.
The power supply must be regulated to within the primary range specified or the
maximum current limited using an appropriate resistance in series with the
amplifier’s positive supply pin. Failure to observe the supply limits will irreparably
damage the device. The resistor should be selected so that the device current is
limited to or less than the maximum rated current. The resistor value may be
easily selected using the following formula:
R = ^{VSUPPLY - VDEVICE TYP.}
I_CC
Example:
9-5
9-5
4
BBA-519-A @ 9V Supply ^{R =} _60x10-3 ⁼ _60x10-3 ⁼ _0.06 ^{= 66Ω}
TYPICAL APPLICATIONS
The schematic in the figure below shows a typical configuration for amplifying the
output of a transmitter.
VCC
270Ω
TX DATA
GND
1 _PDN
ANT
GND
3 _{VCC LO V D}
4 _{GND /CLK SE}
/CLK
TXM-xxx-ES
VCC
10
9
8
7 _GND
6
1 _{GND RF OUT}
GND
GND
4 _{RF IN}
GND
GND
BBA-519-A
8
7
6
5
GND
Figure 6: Typical Application Circuit
In this circuit, the BBA-519-A amplifies the output of the ES Series transmitter.
The transmitter operates on 3V while the amplifier requires 5V, so a 270Ω
resistor is used to drop the 5V supply to 3V for the transmitter.
This configuration would result in a 6 to 7 times increase in system range. Note
that such output levels may render the transmitter illegal for operation in certain
countries, so it is up to the designer to ensure that the product will comply with
the appropriate regulations.
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