MAX2121 19-5959 Rev 1 7/12 Complete Direct-Conversion L-Band Tuner General Description Features 925MHz to 2175MHz Frequency Range The MAX2121 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. Monolithic VCO Low Phase Noise: -97dBc/Hz at 10kHz The device directly converts the satellite signals from No Calibration Required the LNB to baseband using a broadband I/Q downcon- High Dynamic Range: -75dBm to 0dBm verter. The operating frequency range extends from 925MHz to 2175MHz. Integrated LP Filters: 123.75MHz The device includes an LNA and an RF variable-gain Single +3.3V 5% Supply amplifier, I and Q downconverting mixers, and base- Low-Power Standby Mode band lowpass filters and digitally controlled baseband Address Pin for Multituner Applications variable-gain amplifiers. Together, the RF and base- Differential I/Q Interface band variable-gain amplifiers provide more than 80dB 2 of gain control range. I C 2-Wire Serial Interface The device includes fully monolithic VCOs, as well as a Very Small, 5mm x 5mm, 28-Pin TQFN Package complete fractional-N frequency synthesizer. Additionally, an on-chip crystal oscillator is provided Ordering Information along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device PART TEMP RANGE PIN-PACKAGE configuration are accomplished with a 2-wire serial inter- MAX2121ETI+ -40C to +85C 28 TQFN-EP* face. The IC features a VCO autoselect (VAS) function *EP = Exposed pad. that automatically selects the proper VCO. For multituner +Denotes a lead(Pb)-free/RoHS-compliant package. 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 Functional Diagram 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 device is the most advanced broadband/VSAT + DBS tuner available. The low noise figure eliminates the V 21 IDC+ CC RF2 1 DC OFFSET INTERFACE LOGIC need for an external LNA. A small number of passive CORRECTION AND CONTROL MAX2121 components are needed to form a complete broadband V 20 IOUT- CC RF1 2 satellite tuner DVB-S2 RF front-end solution. The tuner is available in a very small, 5mm x 5mm, 28-pin thin IOUT+ GND 3 19 QFN package. RFIN QOUT- 4 18 Applications VSATs 5 GC1 QOUT+ 17 FREQUENCY DIV2/DIV4 SYNTHESIZER V 6 16 V CC LO CC DIG EP V 7 15 REFOUT CC VCO 8 9 10 11 12 13 14 For pricing, delivery, and ordering information, please contact Maxim Direct 1 at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE BYPVCO ADDR TUNEVCO SCL GNDTUNE SDA GNDSYN V CC BB QDC- CPOUT V QDC+ CC SYN IDC- XTALComplete Direct-Conversion L-Band Tuner ABSOLUTE MAXIMUM RATINGS V to GND .........................................................-0.3V to +3.9V Operating Temperature Range .............................-40C to +85C CC All Other Pins to GND.................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC RF Input Power: RFIN.....................................................+10dBm Storage Temperature Range .............................-65C to +160C BYPVCO, CPOUT, XTAL, REFOUT, IOUT , QOUT , IDC , Lead Temperature (soldering, 10s) .................................+300C QDC to GND Short-Circuit Protection...............................10s Soldering Temperature (reflow) .......................................+260C Continuous Power Dissipation (T = +70C) A TQFN (derate 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 (MAX2121 Evaluation Kit: V = +3.13V to +3.47V, f = 27MHz, T = -40C to +85C, V = +0.5V (max gain), default register CC XTAL A GC1 settings except BBG 3:0 = 1011. No input signals at RF, baseband I/Os are open circuited. Typical values measured at V = CC +3.3V, T = +25C, unless otherwise noted.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS SUPPLY Supply Voltage (V) 3.13 3.3 3.47 V CC Receive mode, bit STBY = 0 148 200 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 (TUNEVCO) 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 (Note 2) 0.4 V SINK 2 MAX2121