RF2670 Ver la hoja de datos (PDF) - RF Micro Devices
Número de pieza
componentes Descripción
Lista de partido
RF2670 Datasheet PDF : 12 Pages
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RF2670
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
10
J1
I IN
DCFB I
VCC
J2
IF OUT I
J3
I DATA
RSSI I
V IF EN
50 Ω µstrip
50 Ω µstrip
L1
10 µH
C5
100 nF
T1
C1
220 pF
C2
1 nF
1 IN I-
L2
10 µH
C6
100 nF
2 IN I+
3 GND2
C9
220 nF
4 DCFB I
5 VCC2
6 GND3
7 IF OUT I
C7
100 nF
L3
10 µH
T2
IN Q- 24
C3
1 nF
C4
220 pF
IN Q+ 23
GND1 22
C8
100 nF
L4
10 µH
DCFB Q 21
C10
220 nF
VCC1 20
VGC 19
IF OUT Q 18
50 Ω µstrip
J4
Q IN
DCFB Q
50 Ω µstrip
VCC
VGC
J5
IF OUT Q
50 Ω µstrip
C13
68 pF
8 VCC3
9 I DATA
10 RSSI I
11 V IF EN
VREF 17
RSSI Q 16
Q DATA 15
BW SEL2 14
C11
47 nF
C12
68 pF
VREF
50 Ω µstrip
RSSI Q
J6
Q DATA
12 GND1
BW SEL1 13
2670400-
L1-L4 and C1-C4 make two LPFs. The fc of the RF2670 is variable;
therefore the L and C components must be variable. The following
table gives recommended component values ("std" indicates standard
eval board value).
Desired BW
BW1, BW2 C1, C4 (pF) C2, C3 (pF) L1-L4 (µH)
700 kHz
00
330
1800
22
1.4 MHz
01
220 (std) 1000 (std)
10
2.8 MHz
10
100
470
4.7
7.0 MHz
11
33
180
2.2
P1-1
P1-3
P1
1 V IF EN
2 GND
3 DCFB I
P4-1
P4-3
P4
1 DCFB Q
2 GND
3 VREF
P2-1
P2-3
BW SEL2
BW SEL1
P2
1 RSSI Q
2 GND
3 RSSI I
P5-1
P5-3
P5
1 BW SEL2
2 GND
3 BW SEL1
P3-1
C21
100 pF
C22
10 nF
C23
100 pF
C24
10 nF
C25
100 pF
C26
10 nF
C27
10 µF
P3-3
P3
1 VCC
2 GND
3 VGC
10-52
Rev A4 010820
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