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MAX2106UCM+

更新时间： 2024-01-10 02:41:40
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
10页 188K
描述
DBS Direct Downconverter

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MAX2106UCM+ 数据手册

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19-1627; Rev 3; 6/05  
DBS Direct Downconverter  
General Description  
Advantages Over MAX2104  
ꢀ Improved Front End Achieves 10.2dB NF at 1550MHz  
ꢀ Higher Input IIP3: 11.5dBm at 1550MHz  
The MAX2106 low-cost, direct-conversion tuner IC is  
designed for use in digital direct-broadcast satellite  
(DBS) television set-top box units and is a pin-for-pin  
upgrade for the MAX2104. Its direct-conversion archi-  
tecture reduces system cost compared to devices with  
IF-based architectures. The MAX2106 directly tunes L-  
band signals to baseband using a broadband I/Q  
downconverter. The operating frequency range spans  
925MHz to 2175MHz.  
ꢀ Reduced Spurious Downconversion Products  
ꢀ Capable of Using an External Synthesizer  
Features  
ꢀ Drop-In Replacement for MAX2104 Designs  
Requires Only Minor Software Upgrade and  
Two External Resistor Value Changes  
The IC includes a low-noise amplifier (LNA) with gain  
control, I and Q downconverting mixers, lowpass filters  
with gain and frequency control, a local oscillator (LO)  
buffer with a 90° quadrature network, and a charge-  
pump-based phase-locked loop (PLL) for frequency  
control. The MAX2106 has an on-chip LO, requiring  
only an external varactor-tuned LC tank for operation.  
The LO’s output drives the internal quadrature genera-  
tor and has a buffer amplifier to drive off-chip circuitry.  
The MAX2106 comes in a 48-pin thin quad flat-pack  
package with exposed paddle (EP).  
ꢀ Complete Low-Cost Solution for DBS Direct  
Downconversion  
ꢀ High Level of Integration Minimizes Component  
Count  
ꢀ 1MBaud to 45MBaud Operation  
ꢀ Selectable LO Buffer  
ꢀ +5V Single-Supply Operation  
ꢀ 925MHz to 2175MHz Input Frequency Range  
Applications  
U.S. DSS Set-Top Receivers  
Broadband Systems  
LMDS  
ꢀ On-Chip Quadrature Generator, Dual-Modulus  
European DVB-Compliant  
Systems  
Prescaler (/32, /33)  
Professional Receivers  
VSAT  
Cellular Base Stations  
Wireless Local Loop  
ꢀ On-Chip Crystal Oscillator Amplifier  
Microwave Links  
ꢀ PLL Phase Detector with Gain-Controlled Charge  
Pin Configuration  
Pump  
ꢀ Input Levels: -25dBm to -68dBm per Carrier  
ꢀ Over 50dB Gain Control Range  
TOP VIEW  
ꢀ Noise Figure = 10.2dB; IIP3 = +11.5dBm  
(at 1550MHz)  
ꢀ Automatic Baseband Offset Correction  
V
1
2
3
4
5
6
7
8
9
36 PLLIN-  
35 PLLIN+  
34 MOD-  
33 MOD+  
32 LODIVSEL  
31 IOUT+  
CC  
CFLT  
XTL-  
XTL+  
GND  
Ordering Information  
PART  
TEMP RANGE  
0°C to +85°C  
0°C to +85°C  
PIN-PACKAGE  
48 TQFP-EP*  
48 TQFP-EP*  
V
CC  
MAX2106  
MAX2106UCM  
RFIN-  
RFIN+  
GND  
30 IOUT-  
29  
MAX2106UCM+  
V
CC  
28 QOUT+  
27 QOUT-  
26 RFBAND  
25 FLCLK  
*EP = Exposed paddle.  
GND 10  
QDC- 11  
QDC+ 12  
+Denotes lead-free package.  
Functional Diagram appears at end of data sheet.  
TQFP  
________________________________________________________________ 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.  
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