RF5122 Datasheet, PDF (3/11 Pages) RF Micro Devices – 3V TO 3.6V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER

RF5122
Pin
1
2
3
4
5
6
7
8
Pkg
Base
Function
RF IN
Description
RF input. Input is matched to 50 and DC block is provided internally.
Interface Schematic
VCC
Input
Match
Interstage
Match
VREG
PDETECT
N/C
RF OUT
VC2
VC1
VCC
GND
Bias current control voltage for the first and second amplifier stage.
Power detector which provides an output voltage proportional to the RF
output power level. May need external decoupling capacitor for stability.
May need external circuitry to bring output voltage to desired level.
N _{Must be left as no connect, not grounded.}
RF output. Output is matched to 50 and DC block is provided internally.
ESIG Voltage supply for the second amplifier stage.
D ^{Voltage supply for the first amplifier stage.}
VCC2
Output
Match
RF OUT
Supply voltage for the bias reference and control circuit. May be connected
with V_C1 and V_C2 (with a single supply voltage) as long as V_CC does not
exceed +4.5V_DC in this configuration.
The center metal base of the QFN package provides DC and RF ground as
Pack_Nage ^EDraw^Wing ^{well as heat sink for the amplifier.}
NOT ^FOR
DS110617
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
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