micrf501 Micrel Semiconductor, micrf501 Datasheet - Page 7

• Manufacturer Part Number: micrf501
• Description: 300mhz To 600mhz Radiowire? Rf Transceiver
• Manufacturer: Micrel Semiconductor

Typical Application
Figure 3 shows an example of a transceiver with modulation
applied to the VCO. The inductors and trimming capacitors
must have a good high frequency performance.
The varactor MA4ST-350-1141 is a single variable capaci-
tance diode manufactured by MACOM. The pin diode
MA-4P789-1141 is manufactured by MACOM.
March 2003
2.2p
MICRF501
C35
VDD
VDD
D1
MA4ST350
47n
L1
10Ω
10Ω
100p
R1
R2
C1
C2
1n
R13
270k
C19
470p
47k
R8
C15
6.8n
C18
100n
R12
3.3k
C13
15p
3.6k
R7
150k
R11
R16
1k
C16
100n
R9
8.2k
C17
470p
QchOut
IchOut
R10
8.2k
10MHz
C36
1n
10
11
1
2
3
4
5
6
7
8
9
IFGND
IFVDD
ICHOUT
QCHOUT
OSCVDD
OSCIN
OSCGND
GND
CMPOUT
CMPR
MOD
8.2k
R6
C21
5.6p
44
12
C22
47p
Figure 3. Application Circuit
43
13
C23
1n
C7
4.7n
42
14
C20
2p-6p
C8
4.7n
C24
1n
41
15
Lock
Det
C9
1n
RSSI
40
16
44-pin LQFP
MICRF501
39
17
7
C10
1n
38
18
37
19
C11
1n
36
20
35
21
C12
1n
34
22
RFGND2
DIGGND
RFVDD
RFGND
RFOUT
PABIAS
R3
10Ω
LNA_C
MIXER
MIXER
PA_C
RFIN
GND
VDD
33
32
31
30
29
28
27
26
25
24
23
C3
1n
V
DD
R5
10Ω
R14
1k
C25
470p
C26
10n
C27
22p
V
DD
C5
100p
L5
10n
V
DD
C31
15p
R4
10Ω
C28
6.8p
C4
100p
C6
100p
68n
L4
C32
2.2p
C29
18p
L2
15n
D3
MA4P789-1141
D2
MA4P-789-1141
L3
47n
C33
5.6p
C30
47p
MICRF501
C34
47p
ant-switch
V
DD
Micrel
R15
3.6k
ANT