19-3307; Rev 1; 4/05
HI-IF Single-Chip Broadband TV Tuners
General Description
Features
The MAX3550/MAX3551/MAX3553 low-cost, broad-
band, dual-conversion tuner ICs are designed for use
in analog and digital television receivers. Each IC inte-
grates all necessary RF functions, including an integrat-
ed HI-IF filter, fully integrated VCOs, and an integrated
IF VGA. The operating frequency range extends from
50MHz to 878MHz while providing over 60dB RF/IF
gain-control range. The MAX3550/MAX3551 have an IF
frequency centered at 44MHz, while the MAX3553 has
an IF output centered at 36MHz.
ꢀ Fully Integrated HI-IF Filter
ꢀ Fully Integrated VCOs, No External Components
or Traces
ꢀ Low 8dB Noise Figure
ꢀ High Linearity—+19dBm IIP3 and +52dBm IIP2
ꢀ Industry’s Smallest Footprint
ꢀ Superior Phase Noise for 256-QAM, 8-VSB, and
COFDM
These devices include a variable-gain front end, achiev-
ing an overall 8dB noise figure. A dual synthesizer gen-
erates both local oscillator (LO) frequencies, providing
superior phase noise performance of -86dBc/Hz at
10kHz. The integrated HI-IF filter achieves 68dBc of
image rejection. Only an IF SAW filter, passive loop fil-
ters, and a crystal are needed to complete a single-chip
tuner. Device programming and configuration are
accomplished with a 3-wire serial interface for the
MAX3550, and with a 2-wire serial interface for the
MAX3551/MAX3553.
Ordering Information
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
48 QFN-EP*
48 QFN-EP*
48 QFN-EP*
MAX3550CGM
MAX3551CGM
MAX3553CGM
*EP = Exposed paddle.
The MAX3550/MAX3551/MAX3553 are available in a
48-pin QFN-EP package and are specified for the com-
mercial (0°C to +70°C) temperature range.
Pin Configurations/
Functional Diagrams
Applications
Analog/Digital Cable Set-Top Boxes
OpenCable™ Television Receivers
DVB-T Digital Terrestrial Receivers
ATSC Digital Terrestrial Receivers
Cable Modems
48
47
46
45
44
43
42
41
40
39
38
37
V
1
2
3
4
5
6
7
8
9
36 IFOUT1-
35 IFOUT1+
CC
RFIN+
RFIN-
GND
MAX3550
34
33
32
31
30
29
28
27
26
25
GND
HI-IF
FILTER
V
CC
V
CC
GND
GND
V
CC
V
CC
TUNE2
LOCFLT2
GND
TUNE1
Selector Guide
LOCFLT1
IF CENTER
GND 10
I.C. 11
CS 12
V
CC
CPOUT2
PART
SERIAL INTERFACE
DUAL SYNTHESIZER
FREQUENCY
3-WIRE SERIAL
INTERFACE
MAX3550
MAX3551
MAX3553
3-Wire
2-Wire
2-Wire
44MHz
44MHz
36MHz
V
CC
13
14
15
16
17
18
19
20
21
22
23
24
Pin Configurations/Functional Diagrams continued at end
of data sheet.
OpenCable is a trademark of CableLabs.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.