Rainbow-electronics MAX2114 Bedienungsanleitung PDF herunterladen

General Description

The MAX2114 low-cost, direct-conversion tuner 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 MAX2114 directly

tunes L-band signals to baseband using a broadband

I/Q downconverter. The operating frequency range

spans 925MHz to 2175MHz.

The MAX2114 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 fre-

quency control. The MAX2114 has an on-chip LO,

requiring only an external varactor-tuned LC tank for

operation. The LO’s output drives the internal quadra-

ture generator and has a buffer amplifier to drive off-

chip circuitry. The MAX2114 comes in a 44-pin QFN

package with exposed paddle (EP).

Applications

Features

♦ 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

♦ On-Chip Quadrature Generator, Dual-Modulus

Prescaler (/32, /33)

♦ On-Chip Crystal Oscillator Amplifier

♦ PLL Phase Detector with Gain-Controlled Charge

Pump

♦ Input Levels: -25dBm to -68dBm per Carrier

♦ Over 50dB Gain Control Range

♦ Noise Figure = 10.6dB; IIP3 = +10.7dBm

(at 1550MHz)

♦ Automatic Baseband Offset Correction

MAX2114

DBS Direct Downconverter

________________________________________________________________ Maxim Integrated Products 1

19-1814; Rev 0; 11/00

Functional Diagram appears at end of data sheet.

Ordering InformationPin Configuration

44 QFN-EP*

PIN-PACKAGETEMP. RANGE

0°C to +85°CMAX2114UGH

PART

PLLIN-

PLLIN+

MOD-

MOD+

IOUT+

IOUT-

QOUT+

QOUT-

RFBAND

FLCLK

CFLT

XTL-

XTL+

GND

RFIN+

RFIN-

GND

QDC-

QDC+

IDC-

IDC+

LOBUFSEL

RFOUT

CPG1

XTLOUT

CPG2

GC1

GC2

INSEL

GND

TANK+

VRLO

TANK-

LODIVSEL

LOBUF-/PSOUT-

LOBUF+/PSOUT+

QFN-EP

MAX2114

TOP VIEW

U.S. DSS Set-Top Receivers

European DVB-Compliant

Systems

Cellular Base Stations

Wireless Local Loop

Broadband Systems

LMDS

Professional Receivers

VSAT

Microwave Links

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

*Exposed paddle

1 2 3 4 5 6 7 8

DBS Direct Downconverter 1

Inhaltsverzeichnis

Seite 1 - DBS Direct Downconverter

General DescriptionThe MAX2114 low-cost, direct-conversion tuner isdesigned for use in digital direct-broadcast satellite(DBS) television set-top box

Seite 2

MAX2114DBS Direct Downconverter2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELE

Seite 3

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 3DC ELECTRICAL CHARACTERISTICS

Seite 4

MAX2114DBS Direct Downconverter4 _______________________________________________________________________________________AC ELECTRICAL CHARACTERISTICS

Seite 5

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 5Note 1: Minimum and maximum va

Seite 6

MAX2114DBS Direct Downconverter6 _______________________________________________________________________________________Pin DescriptionPECL Modulus Co

Seite 7

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 7Pin Description (continued)50%

Seite 8

MAX2114DBS Direct DownconverterFunctional DiagramCPCPG1CPG2PLLIN+PLLIN-XTL+XTL-FBXTLOUTLOBUF+/PSOUT+LOBUFSELLOBUF-/PSOUT-IOUT+IOUT-QOUT+QOUT-RFOUTRFBA

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Rainbow-electronics MAX2114 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Hardware Rainbow-electronics MAX2114 herunter. Rainbow Electronics MAX2114 User Manual Benutzerhandbuch

Inhaltsverzeichnis

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