Rainbow-electronics MAX2114 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Hardware Rainbow-electronics MAX2114. Rainbow Electronics MAX2114 User Manual Manual do Utilizador

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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-
V
CC
QOUT+
QOUT-
RFBAND
FLCLK
V
CC
CFLT
XTL-
XTL+
GND
V
CC
RFIN+
RFIN-
GND
QDC-
QDC+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
IDC-
IDC+
LOBUFSEL
RFOUT
CPG1
V
CC
XTLOUT
CPG2
GC1
GC2
INSEL
CP
FB
GND
V
CC
TANK+
VRLO
TANK-
LODIVSEL
V
CC
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
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Resumo do Conteúdo

Página 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

Página 2

MAX2114DBS Direct Downconverter2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELE

Página 3

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 3DC ELECTRICAL CHARACTERISTICS

Página 4

MAX2114DBS Direct Downconverter4 _______________________________________________________________________________________AC ELECTRICAL CHARACTERISTICS

Página 5

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 5Note 1: Minimum and maximum va

Página 6

MAX2114DBS Direct Downconverter6 _______________________________________________________________________________________Pin DescriptionPECL Modulus Co

Página 7

MAX2114DBS Direct Downconverter_______________________________________________________________________________________ 7Pin Description (continued)50%

Página 8

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

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