19-2433; Rev 2; 3/05
Complete DBS Direct-Conversion Tuner ICs
with Monolithic VCOs
General Description
The MAX2116/MAX2118 family of low-cost direct-
conversion tuner ICs are designed for use in digital
direct broadcast satellite (DBS) television applications,
professional VSAT systems, and two-way Internet
through satellite applications. These devices set the
standard for integration and performance, significantly
reducing the required RF know-how for design imple-
mentation. Uniquely architected, the MAX2116/MAX2118
simplify direct main board and tuner module designs.
The MAX2116/MAX2118 devices directly convert L-
band signals to baseband using a broadband I/Q
downconverter. The operating frequency range extends
from 925MHz to 2175MHz.
Each IC includes an LNA with gain control, I and Q
downconverting mixers, and baseband lowpass filters
gain and cutoff frequency control. Together, the RF and
baseband variable gain amplifiers provide more than
79dB of gain control range.
The devices include fully monolithic VCOs, as well as a
complete frequency synthesizer. Additionally, an on-
chip crystal oscillator is provided along with a buffered
output for driving additional tuners and demodulators.
Synthesizer programming and device configuration are
accomplished with a 2-wire serial interface. For multi-
tuner applications, each device can be configured to
have one of eight possible 2-wire interface addresses.
Simplifying the interface to low-voltage CMOS demodu-
lators, the MAX2116/MAX2118 incorporate two 2.85V
regulated outputs for pulling up open-drain interface
connections, thus preventing noisy 3V rails from cor-
rupting the sensitive analog signal of the tuners.
The MAX2116/MAX2118 devices are the most versatile
family of DBS products available. With both single-
ended and differential baseband outputs, these
devices are compatible with virtually all QPSK/8-PSK
demodulators. The tuners are available in a very small
40-pin thin QFN package.
o
Fully Integrated VCOs
o
Supports 1Mbaud to 45Mbaud, 925MHz to
2175MHz Operation
o
4MHz to 33MHz Tunable LP Filters
o
Complete Synthesizer with I
2
C鈩?Interface
o
Analog RF VGA and Digital Baseband VGA
o
Multiple I
2
C Addresses for Multituner
Applications
o
Single-Ended (MAX2116) and Differential
(MAX2118) I/Q Interface
Features
MAX2116/MAX2118
Ordering Information
PART
MAX2116UTL
MAX2118UTL
TEMP RANGE
0擄C to +85擄C
0擄C to +85擄C
PIN-PACKAGE
40 Thin QFN-EP*
(6mm x 6mm)
40 Thin QFN-EP*
(6mm x 6mm)
*EP
= Exposed pad.
Pin Configuration/
Functional Diagram
IOUT-
(MAX2118 ONLY)
QOUT-
(MAX2118 ONLY)
VCCRF2
VCCBB
QOUT+
IOUT+
QDC+
QDC-
40
39
38
37
36
35
34
33
32
31
N.C.
AS0
IDC-
1
DC OFFSET
CORRECTION
LPF BW
CONTROL
30
VCCDIG
IDC+
2
DAC
29
SCL
VCCRF1
3
GC2
DIV2/
DIV4
INTERFACE LOGIC
AND CONTROL
28
VREG2
RFIN-
4
27
SDA
Applications
DVB
DSS (U.S.)
VSAT
Internet Through Satellite
RFIN+
5
26
AS1
N.C.
MAX2118
6
/N
7
PFD
/R
24
25
N.C.
GC1
XTALOUT
VREG1
8
VOLTAGE
REGULATOR
ADC
CP
23
CNTOUT
N.C.
9
TANK
TANK
TANK
TANK
TANK
TANK
TANK
TANK
22
XTAL-
PAD 10
21
XTAL+
11
N.C.
12
VCCLO
13
VCCVCO
14
LOFLT
15
AS2
16
VTUNE
17
CPOUT
18
IFLT
19
VCCCPX
20
CFLT
I
2
C is a trademark of Philips Corp.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
Maxim
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