MAX2120,MAX2120CTI+

Part No.:
MAX2120,MAX2120CTI+
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Download
Description:
Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications
File Size:
314 K
Page:
21 Pages
Logo:
Maker:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype

July 19, 2018:

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PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
19-0832; Rev 0; 6/07
KIT
ATION
EVALU
E
BL
AVAILA
Complete, Direct-Conversion Tuner for DVB-S
and Free-to-Air Applications
General Description
The MAX2120 low-cost, direct-conversion tuner IC is
designed for satellite set-top and VSAT applications.
The IC is intended for QPSK, Digital Video Broadcast
(DVB-S), DSS, and free-to-air applications.
The MAX2120 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 QPSK demodulators.
The MAX2120 includes 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. The IC fea-
tures 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 interface, and
buffer circuits active, providing a method to reduce
power in single and multituner applications.
The MAX2120 is the most advanced DBS tuner available
today. The low noise figure eliminates the need for an
external LNA. A small number of passive components are
needed to form a complete DVB, DBS, or VSAT RF front-
end solution. The tuner is available in a very small 28-pin
thin QFN package.
Features
925MHz to 2175MHz Frequency Range
Monolithic VCO: No Calibration Required
-75dBm to 0dBm High Dynamic Range
4MHz to 40MHz Integrated Variable BW LP Filters
Single +3.3V ±5% Supply
Low-Power Standby Mode
Multiple 2-Wire Addresses for Multituner
Applications
Differential I/Q Interface
I
2
C 2-Wire Serial Interface
Very Small 28-Pin Thin QFN Package
MAX2120
Ordering Information
PART
MAX2120CTI+
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
28 Thin QFN-EP*
PKG
CODE
T2855+3
*
EP = Exposed paddle.
+
Denotes lead-free package.
Pin Configuration/
Functional Diagram
VCC_BB
ADDR
QDC+
QDC-
SDA
IDC-
22
21
IDC+
SCL
27
+
VCC_RF2
1
28
26
25
24
23
INTERFACE LOGIC
AND CONTROL
VCC_RF1
2
MAX2120
LPF BW
CONTROL
DC OFFSET
CORRECTION
20
IOUT-
GND
3
19
IOUT+
Applications
DirecTV and Dish Network DBS
DVB-S
Two-Way Satellite Systems
VSATs
Free-to-Air
VCC_LO
6
EP
RFIN
4
5
DIV2/DIV4
FREQUENCY
SYNTHESIZER
÷
16
VCC_DIG
18
QOUT-
GC1
17
QOUT+
VCC_VCO
7
8
VCOBYP
9
VTUNE
10
GNDTUNE
11
GNDSYN
12
CPOUT
13
VCC_SYN
14
XTAL
15
REFOUT
________________________________________________________________
Maxim Integrated Products
1
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.