max2120ctit Maxim Integrated Products, Inc., max2120ctit Datasheet

no-image

max2120ctit

Manufacturer Part Number
max2120ctit
Description
Max2120 Complete, Direct-conversion Tuner For Dvb-s And Free-to-air Applications
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
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.
19-0832; Rev 0; 6/07
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.
Complete, Direct-Conversion Tuner for DVB-S
DirecTV and Dish Network DBS
DVB-S
Two-Way Satellite Systems
VSATs
Free-to-Air
________________________________________________________________ Maxim Integrated Products
General Description
Applications
and Free-to-Air Applications
♦ 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
♦ Differential I/Q Interface
♦ I
♦ Very Small 28-Pin Thin QFN Package
*
+
MAX2120CTI+
EP = Exposed paddle.
VCC_VCO
Denotes lead-free package.
VCC_RF2
VCC_RF1
VCC_LO
Applications
2
C 2-Wire Serial Interface
RFIN
GND
GC1
PART
1
2
3
4
5
6
7
+
8
28
EP
INTERFACE LOGIC
AND CONTROL
DIV2/DIV4
0°C to +70°C
TEMP RANGE
27
9
10
Ordering Information
26
Functional Diagram
MAX2120
SYNTHESIZER
Pin Configuration/
FREQUENCY
25
11
CONTROL
LPF BW
28 Thin QFN-EP*
PIN-PACKAGE
24
12
CORRECTION
DC OFFSET
23
13
Features
÷
22
14
21
20
19
18
17
16
15
T2855+3
CODE
PKG
IDC+
IOUT-
IOUT+
QOUT-
QOUT+
VCC_DIG
REFOUT
1

Related parts for max2120ctit

max2120ctit Summary of contents

Page 1

Rev 0; 6/07 Complete, Direct-Conversion Tuner for DVB-S 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 ...

Page 2

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +3.9V CC All Other Pins to GND.................................-0. Input Power: RFIN .....................................................+10dBm VCOBYP, CPOUT, REFOUT, XTAL, IOUT_, QOUT_, IDC_, and QDC_ Short-Circuit ...

Page 3

Complete, Direct-Conversion Tuner for DVB-S AC ELECTRICAL CHARACTERISTICS (MAX2120 Evaluation Kit +3.13V to +3.47V and BBG[3:0] = 1011. Typical values measured at V PARAMETER MAIN SIGNAL PATH PERFORMANCE Input Frequency Range (Note 2) RF ...

Page 4

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications AC ELECTRICAL CHARACTERISTICS (continued) MAX2120 Evaluation Kit +3.13V to +3.47V and BBG[3:0] = 1011. Typical values measured at V PARAMETER VOLTAGE-CONTROLLED OSCILLATOR AND LO GENERATION Guaranteed ...

Page 5

Complete, Direct-Conversion Tuner for DVB-S (MAX2120 Evaluation Kit +3.3V, baseband output frequency = 5MHz except ICP = 1 and BBG[3:0] = 1011.) SUPPLY CURRENT vs. SUPPLY VOLTAGE +70° ...

Page 6

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications (MAX2120 Evaluation Kit +3.3V, baseband output frequency = 5MHz except ICP = 1 and BBG[3:0] = 1011.) BASEBAND FILTER FREQUENCY RESPONSE 0 -10 -20 -30 -40 -50 -60 ...

Page 7

Complete, Direct-Conversion Tuner for DVB-S (MAX2120 Evaluation Kit +3.3V, baseband output frequency = 5MHz except ICP = 1 and BBG[3:0] = 1011.) NOISE FIGURE vs. INPUT POWER 70 ADJUST BBG[3:0] FOR 1V P-P BASEBAND OUTPUT WITH ...

Page 8

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications (MAX2120 Evaluation Kit +3.3V, baseband output frequency = 5MHz except ICP = 1 and BBG[3:0] = 1011.) PHASE NOISE vs. OFFSET FREQUENCY -60 -70 -80 -90 -100 -110 ...

Page 9

Complete, Direct-Conversion Tuner for DVB-S PIN NAME DC Power Supply for Synthesizer Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with 13 VCC_SYN a 1nF capacitor connected as close as possible to the pin. Do not share capacitor ...

Page 10

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications Detailed Description Register Description The MAX2120 includes 12 user-programmable registers and 2 read-only registers. See Table 1 for register con- Table 1. Register Configuration REG REGISTER READ/ REG NO NAME WRITE ADDRESS ...

Page 11

Complete, Direct-Conversion Tuner for DVB-S Table 4. Charge-Pump Register BIT NAME BIT LOCATION (0 = LSB) CPMP[1: CPLIN[1: 3–0 Table 5. XTAL Buffer and Reference Divider Register BIT NAME BIT LOCATION (0 = LSB) XD[2:0] ...

Page 12

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications Table 7. VCO Register BIT NAME BIT LOCATION (0 = LSB) VCO[4:0] 7–3 VAS 2 ADL 1 ADE 0 Table 8. Lowpass Filter Register BIT NAME BIT LOCATION (0 = LSB) LPF[7:0] ...

Page 13

Complete, Direct-Conversion Tuner for DVB-S Table 10. Shutdown Register BIT NAME BIT LOCATION (0 = LSB PLL 6 DIV 5 VCO RFMIX 2 RFVGA Table 11. Test Register BIT NAME BIT LOCATION ...

Page 14

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications Table 12. Status Byte-1 Register BIT NAME BIT LOCATION (0 = LSB) POR 7 VASA 6 VASE 3–0 Table 13. Status Byte-2 Register BIT NAME BIT LOCATION (0 ...

Page 15

Complete, Direct-Conversion Tuner for DVB-S 2-Wire Serial Interface 2 The MAX2120 uses a 2-wire I C-compatible serial interface consisting of a serial data line (SDA) and a serial clock line (SCL). SDA and SCL facilitate bidirec- tional communication between the ...

Page 16

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications Figure 2 illustrates an example in which registers 0 through 2 are written with 0x0E, 0xD8, and 0xE1, respectively. There are only two registers on the MAX2120 that are available to be ...

Page 17

Complete, Direct-Conversion Tuner for DVB-S Applications Information The MAX2120 downconverts RF signals in the 925MHz to 2175MHz range directly to the baseband I/Q signals. The devices are targeted for digital DBS tuner applications. The RF input of the MAX2120 is ...

Page 18

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications The MAX2120 has an internal 3-bit ADC connected to the VCO tune pin (VTUNE). This ADC can be used for checking the lock status of the VCOs. Table 14 summarizes the ADC ...

Page 19

Complete, Direct-Conversion Tuner for DVB VCC_RF2 VCC_RF1 2 GND 3 RF INPUT RFIN 4 GC1 VCC_LO VCC_VCO 7 8 ______________________________________________________________________________________ and Free-to-Air Applications SERIAL DATA INPUT/OUTPUT ...

Page 20

Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 20 ______________________________________________________________________________________ Package Information ...

Page 21

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 21 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products and Free-to-Air Applications Package Information (continued registered trademark of Maxim Integrated Products, Inc. ...

Related keywords