RF2642
Evaluation Board Schematic
NOTE:
1. R1, R2 and R8 are optional.
2. R4, R5 and R6 form T-attenuator with a loss of 1 dB.
For 0 dB loss, R4 and R6 are removed, and R5 is a 0 Ω short.
3. R3 and R7 are normally open.
4. FLT BP recommended is a Murata filter: SAFC836.5MC90T-TC12.
5. The microstrip on pin 4 is bridged to ground via 0 Ω 0402 size resistor.
The recommended setting is at maximum of PCB.
6. The microstrip on pin 3 is bridged to ground via 0 Ω resistor. The
recommended setting is at a distance of 35 mils from edge of device.
7. *DNI: Do Not Install
VCC
C10
10 nF
50 Ω μstrip
J5
LO IN
C11
1 nF
Gain Select
R8*
DNI
C9
10 nF
C12
1 nF
C1
1 nF
L4
3.9 nH
50 Ω μstrip
J1
PA OUT
1
16
15
14
13
L1
Logic
Control
8.2 nH
VPA2
2
3
4
12
11
10
T1
TRANS6
50 Ω μstrip
C2
10 nF
J4
IF IN
R1*
DNI
C7
1 nF
P1
1
μstrip
See Note 6
C8
1 nF
2
3
GND
PD
R9
0 Ω
5
6
7
8
9
P1-3
2642400B
CON3
P2
μstrip
See Note 5
1
2
3
P2-1
P2-3
Gain Select
GND
R10
0 Ω
C5
10 nF
L2
8.2 nH
VCC
VPA1
CON3
P3
C3
10 nF
R2*
DNI
FL1
FLT BP
PD
R5
5.1 Ω
P3-1
P3-3
1
VPA1
GND
2
C4
1 nF
C6
1 nF
R4
820 Ω
R6
820 Ω
VPA2
3
50 Ω μstrip
50 Ω μstrip
J2
J3
CON3
PA IN
MIX OUT
R3*
DNI
R7*
DNI
See Note 2
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A8 DS060925
7 of 12
RFMD [ RF MICRO DEVICES ]
