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MAX2104

Maxim
Part Number MAX2104
Manufacturer Maxim
Description Direct-Conversion Tuner IC
Published May 6, 2005
Detailed Description 19-1431; Rev 3; 12/01 Direct-Conversion Tuner IC for Digital DBS Applications General Description The MAX2104 low-cost ...
Datasheet PDF File MAX2104 PDF File

MAX2104
MAX2104


Overview
19-1431; Rev 3; 12/01 Direct-Conversion Tuner IC for Digital DBS Applications General Description The MAX2104 low-cost direct-conversion tuner IC is designed for use in digital direct-broadcast satellite (DBS) television set-top box units.
Its direct-conversion architecture reduces system cost compared to devices with IF-based architectures.
The MAX2104 directly converts L-band signals to baseband signals using a broadband I/Q downconverter.
The operating frequency range extends from 925MHz to 2175MHz.
The IC includes an LNA gain control, I and Q downconverting mixers, lowpass filters with gain control and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump based PLL for frequency control.
The MAX2104 also has an on-chip LO, requiring only an external varactor-tuned LC tank for operation.
The output of the LO drives the internal quadrature generator and dual modulus prescaler.
An on-chip crystal amplifier drives a reference divider as well as a buffer amplifier to drive off-chip circuitry.
The MAX2104 is offered in a 48-pin TQFP-EP package.
o Low-Cost Architecture o Operates from Single 5V Supply o 925MHz to 2175MHz Input Frequency Range o On-Chip Quadrature Generator, Dual-Modulus Prescaler (/32, /33) o On-Chip Crystal Amplifier o PLL Mixer with Gain-Controlled Charge Pump o Input Levels: -25dBm to -65dBm per Carrier o Over 40dB Gain Control Range o Noise Figure = 11.
5dB; IIP3 = 7dBm (at 1550MHz) o Automatic Baseband Offset Correction o Loopthrough Replaces External Splitter o Crystal Output Buffer Features MAX2104 Applications DirecTV, PrimeStar, EchoStar DBS Tuners DVB-Compliant DBS Tuners Broadband Systems LMDS PART MAX2104CCM* Ordering Information TEMP RANGE 0°C to +70°C PIN-PACKAGE 48 TQFP-EP *Contact factory for availability.
Functional Diagram appears at end of data sheet.
Pin Configuration TOP VIEW CP FB GND VCC TANK+ VRLO TANKGND GND VCC PSOUTPSOUT+ 48 47 46 45 44 43 42 41 40 39 38 37 VCC CFLT XTLXTL+ ...


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