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MAX2102-MAX2105

更新时间： 2024-11-23 22:55:27
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
16页 152K
描述
Direct-Conversion Tuner ICs for Digital DBS Applications

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MAX2102-MAX2105 数据手册

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19-1256; Rev 2; 10/98  
Dire c t -Co n ve rs io n Tu n e r ICs fo r  
Dig it a l DBS Ap p lic a t io n s  
/MAX2105  
Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
♦ Low-Cost Bipolar Design, Lowest Cost  
†
The MAX2102/MAX2105 are low-cost direct-conver-  
sion tuner ICs designed for use in digital direct-broad-  
cast satellite (DBS) television set-top box units. The  
direct-conversion architecture reduces system cost  
compared to devices with IF-based architectures.  
Architecture  
♦ Operate from a Single +5V Supply  
♦ 950MHz to 2150MHz Input Frequency Range*  
♦ On-Chip Quadrature Generator, Dual-Modulus  
The MAX2102/MAX2105 directly tune L-band signals to  
b a s e b a nd us ing a b roa d b a nd I/Q d ownc onve rte r.  
Operating frequency range spans from at least 950MHz  
to 2150MHz.  
Prescaler (/64, /65)  
♦ Input Levels  
-69dBm to -19dBm per Carrier (MAX2102)  
The ICs include a low-noise amplifier (LNA) with auto-  
matic gain control (AGC), two downconverter mixers,  
an oscillator buffer with 90° quadrature generator and  
prescaler, and baseband amplifiers.  
-60dBm to -19dBm per Carrier (MAX2105)  
♦ Over 50dB AGC Control Range (MAX2102)  
♦ Noise Figure = 13.2dB (MAX2102);  
IP3 = 6.5dBm (at 1450MHz)  
The MAX2102 features an AGC range of 50dB, allowing  
input power levels as low as -69dBm. The MAX2105  
has a reduced AGC range of 41dB and accepts input  
power levels down to -60dBm. The reduced AGC range  
of the MAX2105 allows the use of a high-gain external  
LNA to achieve a lower system noise figure (NF).  
♦ Automatic Baseband Offset Correction  
♦ Easy Interface to MAX1002/MAX1003 Dual ADC  
and Popular Baseband ICs  
________________________Ap p lic a t io n s  
Ord e rin g In fo rm a t io n  
DBS Tuners  
Wireless Local Loop  
Broadband Systems  
LMDS  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
PIN-PACKAGE  
28 SO  
MAX2102CWI  
MAX2105CWI  
DVB-Compliant DBS Tuners  
Cellular Base Stations  
28 SO  
Fu n c t io n a l Dia g ra m  
RFIN  
8
V
QOUT GND  
13 12  
GND  
11  
AGC  
10  
GND  
9
RFIN  
7
V
GND  
5
V
GND  
IOUT  
2
V
CC  
CC  
CC  
CC  
14  
6
4
3
1
Q
I
90°  
MAX2102  
MAX2105  
/64, /65  
0°  
OFFSET CORRECTION  
16 17 18  
QDC IDC IDC  
15  
QDC  
19  
GND  
20  
21  
LO  
22  
LO  
23  
24  
GND  
25  
26  
27  
28  
V
CC  
V
PSGND  
PSOUT  
MOD V  
CC  
CC  
†
Patents pending  
*Contact factory for MAX2102/MAX2105 versions with expanded frequency range.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
1234567...16

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