MAX3580_09 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – Direct-Conversion TV Tuner

19-0611; Rev 7; 1/09
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Direct-Conversion TV Tuner
General Description
The MAX3580 fully integrated, direct-conversion TV tuner
is designed for Digital Video Broadcasting-Terrestrial
(DVB-T) applications. The integrated tuner covers a
170MHz to 230MHz input frequency range for the VHF-III
band and 470MHz to 878MHz for the UHF band.
The MAX3580 direct-conversion tuner integrates an RF
input switch and a multiband tracking filter, allowing
low-power tuner-on-board applications without the cost
and power-dissipation issues of dual-conversion tuner
solutions. The zero-IF architecture eliminates the need
for SAW filters by providing baseband I and Q outputs
directly to the demodulator. In addition, DC-offset can-
cellation is implemented on-chip using a mixed-signal
architecture to improve the second-order distortion per-
formance and the dynamic range of the downstream
digitizer and demodulator.
The MAX3580 features dynamic gain control of more
than 76dB and a typical midband noise figure of 4.7dB
referred to the LNA input. The VCO architecture opti-
mizes both in-band and wideband phase noise for
OFDM applications where sensitivity to both 1kHz
phase noise and wideband phase noise related to
strong adjacents can be a problem.
The MAX3580 communicates using a 2-wire serial bus.
The device operates from a typical +3.3V power supply
and dissipates 650mW. The MAX3580 is available in a
small 32-pin thin QFN package (5mm x 5mm) with an
exposed paddle.
Applications
Digital Televisions
Digital Terrestrial Set-Tops
Laptop Televisions
Automotive Televisions
USB Peripherals
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3580ETJ+
-40°C to +85°C
32 TQFN-EP*
MAX3580ETJ+T
-40°C to +85°C
32 TQFN-EP*
*EP = Exposed paddle.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape-and-reel package.
Features
♦ 650mW Power Dissipation (at V_CC = +3.3V)
♦ I and Q Baseband Outputs Eliminate All IF-SAW
Filters
♦ Integrated RF Tracking Filters
♦ Tunable Baseband Lowpass Filters
♦ Full-Band VHF-III and UHF Tuning
♦ +38dB Digital ACPR, +47dB Analog ACPR
♦ Low Noise Figure: 4.7dB (typ)
♦ Frac-N Synthesizer for -90dBc/Hz Close-In
Phase Noise
♦ +3.1V to +3.5V Supply Voltage Range
♦ Ultra-Small, 5mm x 5mm Thin QFN Package
Pin Configuration/
Functional Diagram
TOP VIEW
32
+
SDA 1
SCL 2
RFIN2 3
RFIN 4
31
30
29
28
27
26
25
MAX3580
CHARGE
PUMP
SERIAL INTERFACE, CONTROL,
AND
LO
SYNTHESIZER
24 CP
23 LDO
22 GND_TUNE
21 VTUNE
ADDR2 5
20 VCC_VCO
GND_LNA 6
VCC_RF 7
TRACKING
FILTER
0 _{90 LO}
19 BB_AGC
18 BBI+
LEXT 8
17 BBI-
9
10
11
12
13
14
15
16
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.