RF5111PCBA-41X RFMD [RF Micro Devices], RF5111PCBA-41X Datasheet - Page 4

• Manufacturer Part Number: RF5111PCBA-41X
• Description: 3V DCS POWER AMPLIFIER
• Manufacturer: RFMD [RF Micro Devices]

2-4
Pin
10
11
12
13
1
2
3
4
5
6
7
8
9
RF5111
Function
RF OUT
RF OUT
RF OUT
VAT EN
GND1
VCC1
APC1
APC2
RF IN
VCC
2F0
NC
NC
Description
Control pin for the pin diode. The purpose of the pin diode is to attenu-
ate RF drive level when V
through 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 attenua-
tion 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 block-
ing 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 inter-
stage match. Refer to the application schematic for proper configura-
tion, 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
temperature. A shunt bypass capacitor is required. During normal oper-
ation this pin is the power control. Control range varies from approxi-
mately 1.0V for -10dBm to 2.6V for +33dBm RF output power. The
maximum power achievable depends on the actual output matching;
see the application information 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 match-
ing network 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 con-
nected 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 frequency in order to increase efficiency and reduce spurious
outputs.
APC
APC1
is low. This serves to reduce RF leakage
=2.6V, and 0mA when V
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 060921
PIN
RF OUT
GND
From Bias
Stages
VCC1
GND
To RF
Stages
1