MAX3540 Maxim Integrated Products, MAX3540 Datasheet - Page 14

• Manufacturer Part Number: MAX3540
• Description: Complete Single-Conversion Television Tuner
• Manufacturer: Maxim Integrated Products

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Complete Single-Conversion Television Tuner
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
node, with each trace going to separate V
14
1000pF
IFOVLD
*CONNECT TO COMMON GROUND POINT AT PIN 39.
1000pF
______________________________________________________________________________________
V
CC
V
CC
CC
SDATA
node. The V
2.7Ω
SCLK
100Ω
0.1μF
470nF
1000pF
2.7kΩ
V
CC
1000pF
1000pF
V
CC
CC
ADDRESS1
ADDRESS2
traces branch out from this
RFGND2
RFGND3
UHF_IN
VHF_IN
2.7kΩ
RFAGC
LEXT
GND
GND
SDA
SCL
V
V
CC
CC
10
11
12
1
2
3
4
5
6
7
8
9
48
13
22pF
47
14
INTERFACE
CC
SERIAL
46
15
100pF
pins of
45
16
1000pF
÷
100pF
R
4700pF
MAX3540
44
17
÷
PD CP
N
EP
43
18
V
*
CC
0.033μF
1.3kΩ
42
19
1000pF
the MAX3540. Each V
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.
DIVIDER
VCO
41
20
*
270Ω
V
40
21
CC
V
39
22
CC
*
*
38
23
Typical Application Circuit
470pF
+
-
V
REF
1000pF
V
37
24
CC
36
35
34
33
32
31
30
29
28
27
26
25
47μF
1000pF
IFOUT1-
IFOUT1+
IFOVLD
V
V
GND
IFIN+
IFIN-
V
GND
IFAGC
IFOUT2+
CC
CC
CC
CC
pin must have a bypass
1000pF
1000pF
ANTI-ALIASING
V
CC
FILTER
V
CC
1000pF
2.2pF
0.1μF
2.7kΩ
10kΩ
AMPLIFIER
DRIVER
SAW
V
V
CC
CC
IFOVLD
1000pF
1000pF
0.1μF
IFOUT+
IFOUT-
V
IFAGC
680nH
IF-SAW
FILTER