Rainbow Electronics MAX3580 - Manual

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. Electrical performance is guaranteed
over the extended -40°C to +85°C temperature range.
Applications
Digital Televisions
Digital Terrestrial Set-Tops
Laptop Televisions
Automotive Televisions
USB Peripherals
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
♦ Baseband Overload Detector Controls RF AGC if
Desired
♦ +3.1V to +3.5V Supply Voltage Range
♦ Ultra-Small, 5mm x 5mm Thin QFN Package
MAX3580
Direct-Conversion TV Tuner
________________________________________________________________ Maxim Integrated Products 1
PART TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX3580ETJ+ -40°C to +85°C 32 TQFN-EP* T3255-5
MAX3580ETJ+T -40°C to +85°C 32 TQFN-EP* T3255-5
Pin Configuration/
Functional Diagram
Ordering Information
TRACKING
FILTER
GND_TUNE
LDO
XE XB
VCC_VCO
MU
X
RFIN2
ADDR2
LEXT
VC
C
_
SYN
RFIN
RF
_ A
G
C
SCL
SDA
BBI-
BBQ
-
BBQ
+
BB_AGC
BBI+
V
CC_
B B
R
EF_
B U
FF
VCC_RF
OV
LD
_D
ET
IND1 IND2
VC
C
_
XT
AL
VTUNE
CP
OVLD_DET
GND_LNA
G
ND_
C P
G
ND_
P LL
N.C.
TOP VIEW
32 28 29 30 31 25 26 27
10 13 15 14 16 11 12 9
17
18
19
20
21
22
23
24
2
3
4
5
6
7
8
1
MAX3580
0
90
DAC
LO
LO
CHARGE
PUMP
SERIAL INTERFACE, CONTROL,
AND
SYNTHESIZER
19-0611; Rev 0; 7/06
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.
* EP = Exposed paddle.
+ Denotes lead-free package.
T = Tape-and-reel package.
EVALUATION KIT
AVAILABLE