RF2642PCBA Ver la hoja de datos (PDF) - RF Micro Devices
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RF2642PCBA Datasheet PDF : 8 Pages
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Preliminary
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
C10 VCC
10 nF
Gain Select
C11
1 nF
50 Ω µstrip
J5
LO IN
P1-3
P1
1
2 GND
3 PD
J1
PA OUT
VPA2
50 Ω µstrip
L4
3.9 nH
C1
1 nF
C2
10 nF
See Note 6
L1
8.2 nH
R1*
DNI
µstrip
R9
0Ω
C9
10 nF
C12
1 nF
1
16 15 14 13
Logic
2
Control
12
3
11
4
10
5
67
8
9
T1
TRANS6 50 Ω µstrip
J4
C7
IF IN
1 nF
6
C8
1 nF
CON3
P2
P2-1 1 Gain Select
2 GND
P2-3 3 VCC
VPA1
See Note 5
µstrip
R10
0Ω
L2
8.2 nH
C5
10 nF
2642400B
CON3
P3
P3-1 1 VPA1
2 GND
P3-3 3 VPA2
CON3
J2
PA IN
C3
R2*
10 nF
DNI
PD
50 Ω µstrip
C4
1 nF
R3*
DNI
R5
5.1 Ω
FL1
FLT BP
R4
820 Ω
R6
820 Ω
See Note 2
C6
1 nF
R7*
DNI
50 Ω µstrip
J3
MIX OUT
Rev A2 010720
6-53
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