RF5125 Datasheet, PDF (3/12 Pages) RF Micro Devices – 3V TO 5V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER

RF5125
Pin Function Description
1
NC
Not connected. May be connected to ground (GND).
2
RF IN
RF input. See evaluation board schematic for details.
Interface Schematic
VCC
INPUT
MATCH
INTERSTAGE
MATCH
3
RF IN
RF input. See evaluation board schematic for details.
See pin 2.
4
NC
Not connected. May be connected to ground (GND).
5
NC
Do not connect.
Note: VCC voltage may be applied to this pin without damage to, or affect-
ing the performance of, the RF5125.
6
VREG1
Bias current control voltage for the first stage.
7
VREG2
Bias current control voltage for the second stage. The VREG2 pin may be
connected to VREG1 through an external resistor bridge.
8
PDETECT (or ^{Provides an output voltage proportional to the output RF level.}
N/C*)
*In applications where the PDETECT function is not desired, this pin may
be left unconnected.
9
NC
No-connect.
10
RF OUT ^{RF output.}
RF OUT
11
12
13
14
15
16
Pkg
Base
RF OUT
RF OUT/
VC2
NC
VC1
NC
VCC
GND
Same as pin 10.
Power supply for second stage amplifier. Connect as shown on evaluation
board schematic.
BIAS
See pin 10.
Not connected. May be connected to ground (GND).
Power supply for first stage amplifier. Connect as shown on evaluation
board schematic.
Not connected. May be connected to ground (GND).
Supply voltage for the bias reference and control circuits. May be con-
nected with VC1 and VC2 (single-supply voltage).
The center metal base of the QFN package provides DC and RF ground as
well as heat sink for the amplifier.
Rev A23 DS070515
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
3 of 12