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RF5111

Rev A1

DS150909

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

Pin

Function

Description

Interface Schematic

1VAT EN

Control pin for the pin diode. The purpose of the pin diode is to attenuate

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.)

2RF IN

RF Input. This is a 50

Ω 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.

3GND1

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.

See pin 2.

4VCC1

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.

See pin 2.

5APC1

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

6APC2

Power control for the output stage. See pin 6 for more details.

See pin 6.

7VCC

Power supply for the bias circuits.

See pin 6.

8NC

Not connected.

9NC

Not connected.

10

RF OUT

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.

11

RF OUT

Same as pin 10.

Same as pin 10.

12

RF OUT

Same as pin 10.

Same as pin 10.

13

2F0

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.

Same as pin 10.

RF IN

GND

1

VCC1

From Bias

Stages

PIN

From Attn

control circuit

GND

VCC

To RF

Stages

GND

APC

GND

PCKG BASE

RF OUT

From Bias

Stages