rf5111 RF Micro Devices, rf5111 Datasheet - Page 4

• Manufacturer Part Number: rf5111
• Description: 3v Dcs Power Amplifier Rf5111
• Manufacturer: RF Micro Devices

RF5111
4 of 14
Pin
10
11
12
13
1
2
3
4
5
6
7
8
9
Function
RF OUT
RF OUT
RF OUT
VAT EN
GND1
RF IN
VCC1
APC1
APC2
VCC
2F0
NC
NC
Description
Control pin for the pin diode. The purpose of the pin diode is to attenuate
RF drive level when V
the device caused by self-biasing under high RF drive levels. A good input
match is maintained when the input stage bias is turned off by the same
mechanism. When this pin is set high, pin diode attenuation control is
turned on. (See Theory of Operation for details.)
RF Input. This is a 50Ω input, but the actual impedance depends on the
interstage matching network connected to pin 5. An external DC blocking
capacitor is required if this port is connected to a DC path to ground or a
DC voltage.
Ground connection for the preamplifier stage. For best performance, keep
traces physically short and connect immediately to the ground plane. It is
important for stability that this pin has it’s own vias to the groundplane, to
minimize any common inductance.
Power supply for the preamplifier stage and interstage matching. This pin
forms the shunt inductance needed for proper tuning of the interstage
match. Refer to the application schematic for proper configuration, and
note that position and value of the components are important.
Power Control for the driver stage and preamplifier. When this pin is “low”,
all circuits are shut off. A “low” is typically 0.5V or less at room tempera-
ture. A shunt bypass capacitor is required. During normal operation this pin
is the power control. Control range varies from approximately 1.0V for -
10dBm to 2.6V for +33dBm RF output power. The maximum power achiev-
able depends on the actual output matching; see the application informa-
tion for more details. The maximum current into this pin is 5mA when
V
Power control for the output stage. See pin 6 for more details.
Power supply for the bias circuits.
Not connected.
Not connected.
RF output and power supply for the output stage. Bias voltage for the final
stage is provided through this wide output pin. An external matching net-
work is required to provide the optimum load impedance.
Same as pin 10.
Same as pin 10.
Connection for the second harmonic trap. This pin is internally connected
to the RF OUT pins. The bonding wire together with an external capacitor
form a series resonator that should be tuned to the second harmonic fre-
quency in order to increase efficiency and reduce spurious outputs.
APC1
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=2.6V, and 0mA when V
APC
is low. This serves to reduce RF leakage through
APC
=0V.
Interface Schematic
See pin 2.
See pin 2.
See pin 6.
See pin 6.
Same as pin 10.
Same as pin 10.
Same as pin 10.
RF IN
From Attn
control circuit
APC
GND
From Bias
Stages
VCC
GND
PCKG BASE
Rev A1 DS060921
PIN
RF OUT
GND
From Bias
Stages
VCC1
GND
To RF
Stages
1