MAX3570 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – HI-IF Single-Chip Broadband Tuners

19-0067; Rev 0; 2/05
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HI-IF Single-Chip Broadband Tuners
General Description
The MAX3570/MAX3571/MAX3573 low-cost, broad-
band, dual-conversion tuner ICs are designed for use
in digital television receivers. Each IC integrates all
necessary RF functions, including an integrated 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 MAX3570/MAX3571 have an IF frequency
centered at 44MHz, while the MAX3573 has an IF out-
put centered at 36MHz.
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 55dBc (typ) 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
MAX3570, and with a 2-wire serial interface for the
MAX3571/MAX3573.
The MAX3570/MAX3571/MAX3573 are available in a
48-pin QFN-EP package and are specified for the com-
mercial (0°C to +70°C) temperature range.
Applications
DVB-C Digital Terrestrial Receivers
ATSC Digital Terrestrial Receivers
Cable Modems
DOCSIS/EURO DOCSIS Cable Modems
ITU J.83 Digital Set-Top Boxes
PART
MAX3570
MAX3571
MAX3573
Selector Guide
SERIAL INTERFACE
3-Wire
2-Wire
2-Wire
IF CENTER
FREQUENCY
(MHz)
44
44
36
Features
♦ Fully Integrated HI-IF Filter
♦ Fully Integrated VCOs, No External Components
or Traces
♦ Low 8dB Noise Figure
♦ High Linearity—Greater Than 54dBc, CSO, CTB,
X-MOD
♦ Industry’s Smallest Footprint
♦ Superior Phase Noise for 256-QAM, 8-VSB, and
COFDM
Ordering Information
PART
TEMP RANGE
MAX3570CGM
0°C to +70°C
MAX3571CGM
0°C to +70°C
MAX3573CGM
0°C to +70°C
*EP = Exposed paddle.
PIN-PACKAGE
48 QFN-EP*
48 QFN-EP*
48 QFN-EP*
Pin Configurations/
Functional Diagrams
48 47 46 45 44 43 42 41 40 39 38 37
VCC 1
36 IFOUT1-
RFIN+ 2
RFIN- 3
GND 4
VCC 5
MAX3570
HI-IF
FILTER
35 IFOUT1+
34 GND
33 VCC
32 GND
GND 6
31 VCC
VCC 7
30 TUNE2
TUNE1 8
29 LOCFLT2
LOCFLT1 9
28 GND
GND 10
I.C. 11
CS 12
3-WIRE SERIAL
INTERFACE
DUAL SYNTHESIZER
27 VCC
26 CPOUT2
25 VCC
13 14 15 16 17 18 19 20 21 22 23 24
Pin Configurations/Functional Diagrams continued at end
of data sheet.
________________________________________________________________ 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.