MAX2120 19-0832 Rev 2 5/10 Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications General Description Features The MAX2120 low-cost, direct-conversion tuner IC is 925MHz to 2175MHz Frequency Range designed for satellite set-top and VSAT applications. Monolithic VCO: No Calibration Required The IC is intended for QPSK, Digital Video Broadcast -75dBm to 0dBm High Dynamic Range (DVB-S), DSS, and free-to-air applications. 4MHz to 40MHz Integrated Variable BW LP Filters The MAX2120 directly converts the satellite signals Single +3.3V 5% Supply from the LNB to baseband using a broadband I/Q downconverter. The operating frequency range extends Low-Power Standby Mode from 925MHz to 2175MHz. Address Pin for Multituner Applications The device includes an LNA and an RF variable-gain Differential I/Q Interface amplifier, I and Q downconverting mixers, and baseband 2 I C 2-Wire Serial Interface lowpass filters with programmable cutoff frequency Very Small 28-Pin Thin QFN Package control and digitally controlled baseband variable-gain amplifiers. Together, the RF and baseband variable-gain amplifiers provide more than 80dB of gain-control range. Ordering Information The IC is compatible with virtually all QPSK demodulators. The MAX2120 includes fully monolithic VCOs, as well as PART TEMP RANGE PIN-PACKAGE a complete frequency synthesizer. Additionally, an on- MAX2120CTI+ 0C to +70C 28 Thin QFN-EP* chip crystal oscillator is provided along with a buffered *EP = Exposed paddle. output for driving additional tuners and demodulators. +Denotes a lead(Pb)-free/RoHS-compliant package. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface. The IC fea- tures a VCO autoselect (VAS) function that automatically Pin Configuration/ selects the proper VCO. For multituner applications, the device can be configured to have one of two 2-wire Functional Diagram 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. 28 27 26 25 24 23 22 + VCC RF2 21 IDC+ The MAX2120 is the most advanced DBS tuner available 1 DC OFFSET MAX2120 INTERFACE LOGIC CORRECTION today. The low noise figure eliminates the need for an AND CONTROL LPF BW external LNA. A small number of passive components are VCC RF1 2 20 IOUT- CONTROL needed to form a complete DVB, DBS, or VSAT RF front- end solution. The tuner is available in a very small 28-pin IOUT+ GND 3 19 thin QFN package. QOUT- RFIN 4 18 Applications 5 GC1 QOUT+ 17 DirecTV and Dish Network DBS FREQUENCY DIV2/DIV4 SYNTHESIZER DVB-S VCC LO 6 16 VCC DIG EP Two-Way Satellite Systems VCC VCO 7 15 REFOUT VSATs 8 9 10 11 12 13 14 Free-to-Air Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE VCOBYP ADDR VTUNE SCL GNDTUNE SDA GNDSYN VCC BB QDC- CPOUT QDC+ VCC SYN IDC- XTALComplete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +3.9V Continuous Power Dissipation (T = +70C) CC A All Other Pins to GND.................................-0.3V to (V + 0.3V) 28-Pin Thin QFN (derated 34.5mW/C above +70C)........2.75W CC RF Input Power: RFIN.....................................................+10dBm Operating Temperature Range...............................0C to +70C VCOBYP, CPOUT, REFOUT, XTAL, IOUT , QOUT , IDC , and Junction Temperature......................................................+150C QDC Short-Circuit Protection.............................................10s Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C CAUTION ESD SENSITIVE DEVICE Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (MAX2120 Evaluation Kit: V = +3.13V to +3.47V, V = +0.5V (max gain), T = 0C to +70C. No input signals at RF, baseband CC GC1 A I/Os are open circuited, and LO frequency = 2150MHz. Default register settings except BBG 3:0 = 1011. Typical values measured at V = +3.3V, T = +25C, unless otherwise noted.) (Note 1) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS SUPPLY Supply Voltage 3.13 3.3 3.47 V Receive mode, bit STBY = 0 100 160 Supply Current mA Standby mode, bit STBY = 1 3 ADDRESS SELECT INPUT (ADDR) Digital Input-Voltage High, V 2.4 V IH Digital Input-Voltage Low, V 0.5 V IL Digital Input-Current High, I 50 A IH Digital Input-Current Low, I -50 A IL ANALOG GAIN-CONTROL INPUT (GC1) Input Voltage Range Maximum gain = 0.5V 0.5 2.7 V Input Bias Current -50 +50 A VCO TUNING VOLTAGE INPUT (VTUNE) Input Voltage Range 0.4 2.3 V 2-WIRE SERIAL INPUTS (SCL, SDA) Clock Frequency 400 kHz 0.7 x Input Logic-Level High V V CC 0.3 x Input Logic-Level Low V V CC Input Leakage Current Digital inputs = GND or V 0.1 1 A CC 2-WIRE SERIAL OUTPUT (SDA) Output Logic-Level Low I = 1mA 0.4 V SINK 2 MAX2120