RF2668 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2668 Datasheet PDF : 16 Pages
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Preliminary
RF2668
Evaluation Board Schematic
Dual Output Band
P1
1
MODE
2
CE
3
TX EN
4 MIX EN
5 VCO EN
6 PLLON
7 SET1
J9
Cellular
8 SET2
RF OUT
9 GND
J1
PCS
RF OUT
10 LDOUT
P2
1 REF
2 GND
3 VGC
VCC
J2
LO2
P3
1 VTUNE
2 GND
3 VCC
J3
MIX IN
VCC
C18
10 nF
L8*
50 Ω µstrip
C29
3 pF
50 Ω µstrip
C3
0.5 pF
L6*
L1
100 nH
L7
22 nH
L5
10 nH
C4
10 nF
50 Ω µstrip
50 Ω µstrip
T1
T4-1
C5
100 pF
C6
100 pF
C7
1 nF
C8
1 nF
C9
1 nF
J4
MOD OUT
50 Ω µstrip
*Denotes not normally populated.
TX MIX VCO PLL
VCC MODE CE EN EN EN ON
C2
10 nF
C1
1 nF 48 47 46
1
Band Gap
Rel
2
3
4
5
6
7
8
9
10
11
12
13 14 15
R11*
T2
T4-1
L4*
22 nH
C28*
4 pF
R12*
R3
270 Ω
C19
1 nF 50 Ω µstrip
J8
OSC REF
45 44 43 42 41 40 39 38 37
Bias
Supply
/R
Lock
Detect
Charge
/N
Pump
36
35
34
33 LD
32
C20
10 nF
VCC
C26
1 nF
31
C16*
30
29
28
Σ
Quad
/2
27
26
25
16 17 18 19 20 21 22 23 24
2668401-
VCC
C11
C23
1 nF
10 nF
50 Ω µstrip
R1
39 kΩ
C12
1 nF
C10
10 nF
C24
10 nF
50 Ω µstrip
C13
10 nF
R2
47 kΩ
J6
ISIG
REF
J5
OSIG
SET1
SET2
C21
2.2 nF
R4
36 kΩ
C22
220 pF
C27
33 pF
L3
D1
39 nH
L2
39 nH
C17
10 nF
T3
T4-1
R7
200 Ω
50 Ω µstrip
DO
VCC
R8*
J7 R9
L01 3.9 kΩ
VTUNE
DO
VCC
Chip Enable
R6*
LD
R5
510 Ω
C25
10 nF
Q1
PNP
Digikey
MMBT3906DICT-ND
LD OUT
R10
510 kΩ
VCC
VGC
5
Rev B4 010423
5-83
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