max2112ctit Maxim Integrated Products, Inc., max2112ctit Datasheet

no-image

max2112ctit

Manufacturer Part Number
max2112ctit
Description
Max2112 Complete, Direct-conversion Tuner For Dvb-s2 Applications
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The MAX2112 low-cost, direct-conversion tuner IC is
designed for satellite set-top and VSAT applications.
The IC is intended for 8PSK and Digital Video
Broadcast (DVB-S2) applications.
The MAX2112 directly converts the satellite signals
from the LNB to baseband using a broadband I/Q
downconverter. The operating frequency range extends
from 925MHz to 2175MHz.
The device includes an LNA and an RF variable-gain
amplifier, I and Q downconverting mixers, and baseband
lowpass filters with programmable cutoff frequency control
and digitally controlled baseband variable-gain amplifiers.
Together, the RF and baseband variable-gain amplifiers
provide more than 80dB of gain control range. The IC is
compatible with virtually all DVB-S2 demodulators.
The MAX2112 includes fully monolithic VCOs, as well as
a complete fractional-N 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 inter-
face. The IC features a VCO autoselect (VAS) function
that automatically selects the proper VCO. For multituner
applications, the device can be configured to have one
of two 2-wire interface addresses. A low-power standby
mode is available whereupon the signal path is shut
down while leaving the reference oscillator, digital inter-
face, and buffer circuits active, providing a method to
reduce power in single and multituner applications.
The MAX2112 is the most advanced DBS tuner avail-
able today. The low noise figure eliminates the need for
an external LNA. A small number of passive compo-
nents are needed to form a complete DVB-S2 RF front-
end solution. The tuner is available in a very small
28-pin thin QFN package.
19-0869; Rev 1; 12/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
DirecTV and Dish Network DBS
DVB-S2
VSATs
________________________________________________________________ Maxim Integrated Products
General Description
Applications
Tuner for DVB-S2 Applications
Complete, Direct-Conversion
♦ 925MHz to 2175MHz Frequency Range
♦ Monolithic VCO
♦ High Dynamic Range: -75dBm to 0dBm
♦ Integrated Variable BW LP Filters: 4MHz to 40MHz
♦ Single +3.3V ±5% Supply
♦ Low-Power Standby Mode
♦ Address Pin for Multituner Applications
♦ Differential I/Q Interface
♦ I
♦ Very Small 28-Pin TQFN Package
* EP = Exposed paddle.
+ Denotes a lead-free package.
VCC_VCO
MAX2112CTI+
MAX2112ETI+
VCC_RF2
VCC_RF1
VCC_LO
2
RFIN
GND
GC1
C 2-Wire Serial Interface
PART
Low Phase Noise: -97dBc/Hz at 10kHz
No Calibration Required
1
2
3
4
5
6
7
+
8
28
EP
INTERFACE LOGIC
AND CONTROL
DIV2/DIV4
-40°C to +85°C 28 Thin QFN-EP* T2855+3
TEMP RANGE PIN-PACKAGE
27
9
0°C to +70°C
10
26
Ordering Information
Functional Diagram
MAX2112
SYNTHESIZER
FREQUENCY
25
11
Pin Configuration/
CONTROL
LPF BW
28 Thin QFN-EP* T2855+3
24
12
CORRECTION
DC OFFSET
23
13
Features
22
14
21
20
19
18
17
16
15
CODE
PKG
IDC+
IOUT-
IOUT+
QOUT-
QOUT+
VCC_DIG
REFOUT
1

Related parts for max2112ctit

Related keywords