EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX2112 Complete, Direct-Conversion Tuner for DVB-S2 Applications General Description Features The MAX2112 low-cost, direct-conversion tuner IC is 925MHz to 2175MHz Frequency Range designed for satellite set-top and VSAT applications. Monolithic VCO The IC is intended for 8PSK and Digital Video Broadcast Low Phase Noise: -97dBc/Hz at 10kHz (DVB-S2) applications. No Calibration Required The MAX2112 directly converts the satellite signals High Dynamic Range: -75dBm to 0dBm from the LNB to baseband using a broadband I/Q Integrated Variable BW LP Filters: 4MHz to 40MHz downconverter. The operating frequency range extends from 925MHz to 2175MHz. Single +3.3V 5% Supply The device includes an LNA and an RF variable-gain Low-Power Standby Mode amplifier, I and Q downconverting mixers, and baseband Address Pin for Multituner Applications lowpass filters with programmable cutoff frequency control Differential I/Q Interface and digitally controlled baseband variable-gain amplifiers. 2 I C 2-Wire Serial Interface Together, the RF and baseband variable-gain amplifiers provide more than 80dB of gain control range. The IC is Very Small 28-Pin TQFN Package compatible with virtually all DVB-S2 demodulators. The MAX2112 includes fully monolithic VCOs, as well Ordering Information as a complete fractional-N frequency synthesizer. PART TEMP RANGE PIN-PACKAGE Additionally, an on-chip crystal oscillator is provided MAX2112CTI+ 0C to +70C 28 Thin QFN-EP* along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device MAX2112ETI+ -40C to +85C 28 Thin QFN-EP* configuration are accomplished with a 2-wire serial inter- *EP = Exposed paddle. face. The IC features a VCO autoselect (VAS) function +Denotes a lead(Pb)-free/RoHS-compliant package. that automatically selects the proper VCO. For multituner Pin Configuration/ applications, the device can be configured to have one of two 2-wire interface addresses. A low-power standby Functional Diagram 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. 28 27 26 25 24 23 22 + The MAX2112 is the most advanced DBS tuner available 21 IDC+ VCC RF2 1 DC OFFSET MAX2112 today. The low noise figure eliminates the need for an INTERFACE LOGIC CORRECTION AND CONTROL LPF BW external LNA. A small number of passive components IOUT- VCC RF1 2 20 CONTROL are needed to form a complete DVB-S2 RF front-end solution. The tuner is available in a very small 28-pin thin IOUT+ GND 19 3 QFN package. QOUT- RFIN 4 18 Applications 5 DirecTV and Dish Network DBS GC1 QOUT+ 17 DVB-S2 FREQUENCY DIV2/DIV4 SYNTHESIZER VSATs VCC LO 6 16 VCC DIG EP VCC VCO 7 15 REFOUT 8 9 10 11 12 13 14 19-0869 Rev 3 4/20 VCOBYP ADDR VTUNE SCL GNDTUNE SDA GNDSYN VCC BB QDC- CPOUT VCC SYN QDC+ IDC- XTALMAX2112 Complete, Direct-Conversion Tuner for DVB-S2 Applications Absolute Maximum Ratings V to GND .........................................................-0.3V to +3.9V Operating Temperature Range (MAX2112CTI+) ....0C to +70C CC All Other Pins to GND .............................. -0.3V to (V + 0.3V) Operating Temperature Range (MAX2112ETI+) .. -40C to +85C CC RF Input Power: RFIN ....................................................+10dBm Junction Temperature ......................................................+150C VCOBYP, CPOUT, XTAL, REFOUT, IOUT , QOUT , IDC , Storage Temperature Range ............................ -65C to +160C QDC to GND Short-Circuit Protection ............................. 10s Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) Soldering Temperature (reflow) .......................................+260C A 28-Pin Thin QFN (derated 34.5mW/C above +70C) ..2.75W 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. CAUTION ESD SENSITIVE DEVICE DC Electrical Characteristics (MAX2112 Evaluation Kit: V = +3.13V to +3.47V, T = 0C to +70C (MAX2112CTI+), T = -40C to +85C (MAX2112ETI+), CC A A V = +0.5V (max gain), default register settings except BBG 3:0 = 1011. No input signals at RF, baseband I/Os are open circuited. GC1 Typical values measured at V = +3.3V, T = +25C.) (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 Maxim Integrated 2 www.maximintegrated.com