RF2668 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2668 Datasheet PDF : 16 Pages
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RF2668
Preliminary
5
Evaluation Board Schematic
RFOUT = 830 MHz
(Download Bill of Materials from www.rfmd.com.)
CE
R6*
LD
R5
510 Ω
C25
10 nF
Q1
PNP
Zetex
FMMT3906TA
LD OUT
R10
510 kΩ
P1
1
MODE
2
CE
3 TX EN
4 MIX EN
5 VCO EN
6 PLLON
7 SET1
8 SET2
9 GND
10 LDOUT
P2
1 REF
2 GND
3 VGC
P3
1 VTUNE
2 GND
3 VCC
AGC
CE
MODE
VCC
VCC
J1
RF OUT
VCC
J2
LO2
J3
MIX IN
50 Ω µstrip
50 Ω µstrip
50 Ω µstrip
T1
T4-1
MIX EN VCO EN
C2
10 nF
R3
C19
270 Ω
1 nF
C18
10 nF
C3
2 pF
L1
12 nH
C1
1 nF 48 47 46 45 44 43 42 41 40 39 38 37
1
Band Gap
Rel
2
3
Bias
Supply
36
35
/R
Lock
Detect
34
C4
4
10 nF
5
Charge
/N
Pump
33 LD
32
C5
100 pF
C6
100 pF
C7
1 nF
C8
1 nF
C9
1 nF
6
31
7
30
8
29
9
28
10
Σ
Quad
/2
27
11
26
12
25
2668400A
13 14 15 16 17 18 19 20 21 22 23 24
C16**
R2
47 kΩ
50 Ω µstrip
C20
10 nF
C26
C21
1 nF
2.2 nF
R4
36 kΩ
L3
D1
39 nH
L2
39 nH
T3
T4-1
R7
200 Ω
C22
220 pF
C17
10 nF
C27
33 pF
R8**
R9
3.9 kΩ
50 Ω µstrip
C13
10 nF
PLL ON
J8
OSC REF
SET1
SET2
DO
VCC
VTUNE
DO
J7
L01
VCC
J4
MOD OUT
50 Ω µstrip
NOTE: To tune the board for RF OUT = 1950 MHz, change L1 to 2.2 nH.
**Denotes not normally populated.
T2
T4-1
C10
10 nF
C11
1 nF
R1
39 kΩ
VCC
C23
10 nF
C12
1 nF
VCC VGC
C23
10 nF
50 Ω µstrip
J6
ISIG
REF
50 Ω µstrip
J5
OSIG
5-82
Rev B4 010423
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