RF2638 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2638 Datasheet PDF : 10 Pages
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RF2638
Evaluation Board Schematic - PCS/Cellular
RF=1880MHz, IF=130MHz
(Download Bill of Materials from www.rfmd.com.)
J2
IF IN
50 Ω µstrip
C5
68 pF
T1
1
L1
270 nH
2
C7
10 nF
VCC
L2
8
*
C6
50 Ω µstrip
J3
RF OUT
7
*
J1
50 Ω µstrip
6
LO IN
3
C2
1 nF
4
C3
*
6
5
C4
*
2638400-
C1
10 nF
VCC
P1-1
P1
1 VCC
L2* C3*
PCS** 2.7 nH 5 pF
Cellular 12 nH 22 pF
**Board as provided.
C4*
5 pF
22 pF
C6*
1.5 pF
2 pF
Note: Board losses: 0.1 dB, Transformer losses: 1 dB
2 GND
3 NC
CON3
J2
IF IN
J1
LO IN
Evaluation Board Schematic - Dual Output
Cellular Out=836MHz, PCS Out=1880MHz, IF=130MHz
50 Ω µstrip
C5
100 pF
L1*
TBD
T1
T4-1
C9*
TBD
C10*
TBD
P1
1 NC
P1-2 2 VCC
3 GND
CON3
1
2
Bias Choke Only;
Not part of matching network
VCC
C7
10 nF
L2
100 nH
L3
6.8 nH
C8
4 pF
C6
0.5 pF
50 Ω µstrip
L5
5.6 nH
J3
PCS OUT
L4
Dual Band, Split Outputs matching network:
8
18 nH
Diplexed match at US cellular and PCS transmit bands.
J4
7
50 Ω µstrip
CELL OUT
50 Ω µstrip
C2
1 nF
C3
5 pF
3
6
4
5
C4
5 pF
Note: Board losses: 0.1 dB, Transformer loss: 1 dB
C1
10 nF
2638401, Rev 1
VCC
6-30
Rev B13 010731
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