Typical application circuit, Node. the v, Pins of the max3540. each v – Rainbow Electronics MAX3540 User Manual
Page 14
MAX3540
Complete Single-Conversion Television Tuner
14
______________________________________________________________________________________
GND
GND
GND
GND
GND
V
CC
GND
IFOUT2-
GND
GND
GND
GND
IFOVLD
V
CC
GND
IFOUT1-
*CONNECT TO COMMON GROUND POINT AT PIN 39.
IFOUT1+
IFIN+
IFIN-
IFAGC
IFOUT2+
V
CC
GND
LEXT
RFGND3
RFAGC
V
CC
GND
V
CC
V
REF
XTALP
V
CC
CP
ADDR2
ADDR1
MUX
V
CC
LDO
V
CC
VTUNE
GND_TUNE
XTALN
3
5
4
6
GND
7
8
10
9
11
12
VHF_IN
RFGND2
2
V
CC
UHF_IN
1
R
34
32
33
31
30
+
-
29
27
28
26
25
35
36
17
16
21
20
19
18
22
23
24
15
14
13
44
45
÷
N
÷
PD
CP
40
41
42
43
39
38
37
46
47
48
SCL
SDA
MAX3540
VCO
DIVIDER
EP
SERIAL
INTERFACE
100pF
22pF
1000pF
1000pF
470nF
2.7k
Ω
V
IFAGC
IFOUT+
IFOVLD
IFOUT-
270
Ω
2.7
Ω
100
Ω
IFOVLD
SDATA
SCLK
ADDRESS2
ADDRESS1
1.3k
Ω
*
*
*
*
2.7k
Ω
2.7k
Ω
10k
Ω
0.033
μF
2.2pF
470pF
100pF
1000pF
V
CC
1000pF
V
CC
V
CC
0.1
μF
1000pF
V
CC
V
CC
V
CC
1000pF
V
CC
1000pF
1000pF
47
μF
4700pF
V
CC
V
CC
1000pF
0.1
μF
1000pF
0.1
μF
V
CC
1000pF
V
CC
V
CC
1000pF
ANTI-ALIASING
FILTER
680nH
1000pF
1000pF
IF-SAW
FILTER
SAW
DRIVER
AMPLIFIER
Typical Application Circuit
To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configura-
tion, which has a large decoupling capacitor at the
central V
CC
node. The V
CC
traces branch out from this
node, with each trace going to separate V
CC
pins of
the MAX3540. Each V
CC
pin must have a bypass
capacitor with a low impedance to ground at the fre-
quency of interest. Do not share ground vias among
multiple connections to the PCB ground plane.