RF2642
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
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
R8*
DNI
C1
1 nF
C10 VCC
10 nF
Gain Select
C11
1 nF
50
Ω μstrip
J5
LO IN
J1
PA OUT
50
Ω μstrip
L4
3.9 nH
C9
10 nF
1
16
15
14
13
C12
1 nF
VPA2
C2
10 nF
P1
1
2
P1-3
3
CON3
P2
P2-1
1
2
P2-3
3
CON3
P3
P3-1
1
2
P3-3
3
CON3
VPA1
GND
VPA2
J2
PA IN
Gain Select
GND
VCC
VPA1
GND
PD
See Note 6
L1
8.2 nH
R1*
DNI
μstrip
R9
0
Ω
2
3
4
Logic
Control
12
11
10
C8
1 nF
2642400B
T1
TRANS6
C7
1 nF
50
Ω μstrip
J4
IF IN
5
6
7
8
9
μstrip
See Note 5
R10
0
Ω
C5
10 nF
L2
8.2 nH
C3
10 nF
R2*
DNI
PD
R5
5.1
Ω
R4
820
Ω
R6
820
Ω
FL1
FLT BP
50
Ω μstrip
C4
1 nF
R3*
DNI
C6
1 nF
R7*
DNI
50
Ω μstrip
J3
MIX OUT
See Note 2
6-54
Rev A8 060925
RFMD [ RF MICRO DEVICES ]
