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MAX3580_07

更新时间： 2024-11-09 04:42:03
品牌 Logo 应用领域
美信 - MAXIM 电视
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21页 419K
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Direct-Conversion TV Tuner

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MAX3580_07 数据手册

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19-0611; Rev 3; 10/07  
Direct-Conversion TV Tuner  
MAX3580  
General Description  
Features  
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.  
♦ 650mW Power Dissipation (at V  
= +3.3V)  
CC  
♦ I and Q Baseband Outputs Eliminate All IF-SAW  
Filters  
♦ Integrated RF Tracking Filters  
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.  
♦ 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  
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.  
♦ +3.1V to +3.5V Supply Voltage Range  
♦ Ultra-Small, 5mm x 5mm Thin QFN Package  
Pin Configuration/  
Functional Diagram  
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.  
TOP VIEW  
32  
31  
30  
29  
28  
27  
26  
25  
Applications  
Digital Televisions  
CHARGE  
PUMP  
1
2
3
4
5
6
7
8
SDA  
SCL  
24  
23  
22  
21  
20  
19  
18  
CP  
MAX3580  
Digital Terrestrial Set-Tops  
Laptop Televisions  
LDO  
SERIAL INTERFACE, CONTROL,  
RFIN2  
AND  
SYNTHESIZER  
GND_TUNE  
VTUNE  
VCC_VCO  
BB_AGC  
BBI+  
LO  
Automotive Televisions  
RFIN  
DAC  
USB Peripherals  
OVLD_DET  
ADDR2  
GND_LNA  
VCC_RF  
LEXT  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
TRACKING  
FILTER  
PART  
TEMP RANGE  
0
90  
LO  
MAX3580ETJ+  
-40°C to +85°C 32 TQFN-EP*  
T3255-5  
T3255-5  
17 BBI-  
MAX3580ETJ+T -40°C to +85°C 32 TQFN-EP*  
*EP = Exposed paddle.  
9
10  
11  
12  
13  
14  
15  
16  
+Denotes lead-free package.  
T = Tape-and-reel package.  
________________________________________________________________ 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.  
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