MAX2104 Maxim Integrated Products, MAX2104 Datasheet

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MAX2104

Manufacturer Part Number
MAX2104
Description
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX2104.pdf (9 pages)

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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 con-
verts 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 downcon-
verting mixers, lowpass filters with gain control and fre-
quency 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.
19-1431; Rev 4; 6/05
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.
DirecTV, PrimeStar, EchoStar DBS Tuners
DVB-Compliant DBS Tuners
Broadband Systems
LMDS
TOP VIEW
________________________________________________________________ Maxim Integrated Products
General Description
RFIN+
QDC+
RFIN-
QDC-
CFLT
XTL+
XTL-
GND
GND
GND
Applications
V
V
CC
CC
10
11
12
1
2
3
4
5
6
7
8
9
Direct-Conversion Tuner IC for
EP
MAX2104
TQFP
Digital DBS Applications
o Low-Cost Architecture
o Operates from Single 5V Supply
o 925MHz to 2175MHz Input Frequency Range
o On-Chip Quadrature Generator, Dual-Modulus
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
*Contact factory for availability.
**EP = Exposed paddle.
+Denotes lead-free package.
Functional Diagram appears at end of data sheet.
MAX2104CCM*
MAX2104CCM+
Prescaler (/32, /33)
PART
36
35
34
33
32
31
30
29
28
27
26
25
PLLIN-
PLLIN+
MOD-
MOD+
GND
IOUT+
IOUT-
V
QOUT+
QOUT-
FDOUB
FLCLK
TEMP RANGE
0°C to +70°C
0°C to +70°C
CC
Ordering Information
Pin Configuration
PIN-
PACKAGE
48 TQFP-EP**
48 TQFP-EP**
Features
C48E-10
C48E-10
CODE
PKG
1

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MAX2104 Summary of contents

Page 1

... 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 ...

Page 2

Direct-Conversion Tuner IC for Digital DBS Applications ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.5V to +7V CC All Other Pins to GND.................................-0. RF1+ to RF1-, RF2+ to RF2-, TANK+ to TANK-, IDC+ to IDC-, QDC+ to QDC- ............................................±2V ...

Page 3

DC ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V 2.4V 2.4V, V FDOUB INSEL CPG1 CPG2 V = 5.0V and T = +25°C, unless otherwise noted.) CC ...

Page 4

Direct-Conversion Tuner IC for Digital DBS Applications AC ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V IOUT_ QOUT_ 2.4V, V FDOUB INSEL CPG1 CPG2 V = 5.0V and ...

Page 5

AC ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V IOUT_ QOUT_ 2.4V, V FDOUB INSEL CPG1 CPG2 V = 5.0V and T = +25°C, unless otherwise noted.) CC ...

Page 6

Direct-Conversion Tuner IC for Digital DBS Applications PIN NAME 1, 6, 19, V Power-Supply Input. Connect each pin to a +5V ±5% low-noise supply. Bypass each 29, 39, 45 nearest GND with a ceramic chip capacitor. ...

Page 7

PIN NAME PECL Modulus Control. A PECL low on MOD- sets the dual-modulus prescaler to divide by 32. A PECL 34 MOD- logic high sets the divide ratio to 33. Drive with a differential PECL signal with MOD+ (pin 33). ...

Page 8

... FDOUB TANK+ TANK VRLO CFLT GND RFIN- RFIN+ GC1 GC2 FLCLK INSEL 8 _______________________________________________________________________________________ CHARGE PUMP /8 /32 VOLTAGE REGULATOR 0°/90° Functional Diagram MAX2104 CP FB XTLOUT PSOUT+ PSOUT- IDC+ BASEBAND IDC- OFFSET QDC+ CORRECTION QDC- IOUT+ IOUT- QOUT+ QOUT- RFOUT ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 9 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Direct-Conversion Tuner IC for ...

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