micrf500blq Micrel Semiconductor, micrf500blq Datasheet - Page 7

• Manufacturer Part Number: micrf500blq
• Description: 700mhz To 1.1ghz Radiowire? Rf Transceiver
• Manufacturer: Micrel Semiconductor

Typical Application
Figure 2 shows an example of a transceiver with modulation
applied to the VCO. The VCO and matching components are
optimized for 915MHz, 120kbps data rate. The inductors and
trimming capacitors must have a good high frequency perfor-
mance.
March 2003
MICRF500
SMV1215
VDD
VDD
C38
D1
30Ω
0Ω
R1
R2
47p
C1
R13
270k
C19
470p
39k
R8
C15
3.3n
C18
100n
12n
R12
6.8k
L1
20k
R7
C16
39n
100k
R11
Figure 2. Application Circuit - Optimized for 915MHz. 120kbps
10MHz
R9
16k
C17
68p
C13
4.7p
QchOut
IchOut
R10
16k
C34
10n
10
11
1
2
3
4
5
6
7
8
9
IFGND
IFVDD
ICHOUT
QCHOUT
OSCVDD
OSCIN
OSCGND
GND
CMPOUT
CMPR
MOD
R6
1k
C22
7p
44
12
100p
C21
43
13
C23
1n
C7
4.7n
C20
4p to 10p
42
14
C8
4.7n
C24
1n
Lock
41
15
Det
C9
1n
RSSI
40
16
44-pin LQFP
MICRF500
39
17
C10
1n
7
38
18
The varactor SMV1215-011 is a single variable capacitance
diode manufactured by Skyworks Solutions (formerly Alpha
Industries). The pin diode SMP1320 is also manufactured by
Skyworks Solutions.
37
19
C11
1n
36
20
35
21
C12
1n
34
22
RFGND2
DIGGND
RFGND
RFVDD
RFOUT
PABIAS
R3
39Ω
MIXER
MIXER
LNA_C
PA_C
RFIN
GND
VDD
33
32
31
30
29
28
27
26
25
24
23
V
DD
R5
62Ω
C5
47p
R14
2.2k
C25
470p
C26
10n
C28
18p
V
DD
C35
47p
L5
10n
V
DD
R4
10Ω
C4
47p
C31
4.7p
C6
47p
5.6n
L4
R16
2.2k
C29
100p
C36
1.5p
V
L2
5.1n
DD
D3
SMP1320-079
D2
SMP1320-079
L3
8.7n
C32
6.8p
C33
47p
C30
47p
C37
4p
MICRF500
ant-switch
ANT
Micrel