MAX2170/MAX2171 19-0699 Rev 0 4/07 Direct-Conversion to Low-IF Tuners for Digital Audio Broadcast General Description Features The MAX2170/MAX2171 direct-conversion to low-IF +2.7V to +3.5V Supply Voltage Range tuners are designed for Digital Audio Broadcast (DAB) Low-IF Output Eliminates IF-SAW Filter and Terrestrial Digital Multimedia Broadcast (T-DMB) applications, covering an input frequency range of Integrated Low-IF Bandpass Filter 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz Sigma-Delta Fractional-N Synthesizer (L-Band), and also 87MHz to 108MHz (FM). The +45dB Digital ACPR MAX2170/MAX2171 achieve a high level of component integration, allowing low-power, tuner-on-board 3.5dB Typical Noise Figure for VHF-III designs. The direct-conversion to low-IF architecture (Includes On-Chip Tracking Filter) eliminates the need for an IF-SAW filter while providing 3.1dB Typical Noise Figure for L-Band a balanced 2.048MHz center frequency baseband output to the demodulator. VHF-III Sensitivity of -100dBm The MAX2170 provides a buffered reference clock L-Band Sensitivity of -99dBm at the crystal frequency, while the MAX2171 outputs a Baseband Overload Detector Controls RF AGC reference at 1/3rd of the crystal frequency. A sigma-delta fractional-N synthesizer is incorporated to optimize both close-in and wideband phase noise performances for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise Typical Application Circuit appears at end of data sheet. related to strong adjacents can be a problem. The MAX2170/MAX2171 are available in a 40-pin thin QFN package (6mm x 6mm) with an exposed paddle. Electrical performance is guaranteed over the extended -40C to +85C temperature range. Pin Configuration/ Applications Functional Diagram Fixed and Mobile Digital Audio Broadcast (DAB) Terrestrial Digital Multimedia Broadcast (T-DMB) 40 39 38 37 36 35 34 33 32 31 + VTUNE 1 30 REF OUT SERIAL INTERFACE, CONTROL, DIV/N AND SYNTHESIZER VCC LDO 2 29 MUX Ordering Information DAC VREF DIV/N LO LDO BYPASS 3 28 IDC- PIN- PKG PART TEMPRANGE PACKAGE CODE VCC LBAND 4 27 IDC+ MAX2170/ MAX2171 40 Thin QFN-EP* N.C. 5 26 BBAGC MAX2170ETL+ -40C to +85C T4066+2 (6mm x 6mm) 0 LBAND IN 6 LO 25 QDC- 90 P1 40 Thin QFN-EP* MAX2171ETL+ -40C to +85C T4066+2 PDET GND 7 24 QDC+ (6mm x 6mm) ADDR 8 TRACKING 23 BBOUT+ +Denotes lead-free package. FILTER 0 ZERO IF LO 90 *EP = Exposed paddle. VHF IN 9 22 BBOUT- 2.048MHz P1 PWRDET IND1 10 21 STBY VREF 11 12 13 14 15 16 17 18 19 20 THIN QFN 6mm x 6mm Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE IND2 GND AC GND CPOUT GND GND VCC VHF VCC SYN AC GND GND VCC MIX SDA VCC BB SCL GND XTAL RFAGC GND PDET VCC XTALDirect-Conversion to Low-IF Tuners for Digital Audio Broadcast ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +3.6V Operating Temperature Range ...........................-40C to +85C CC VHF IN ..................................................................-0.3V to +1.9V Maximum Junction Temperature .....................................+150C LBAND IN, IND1, IND2.........................................-0.3V to +0.9V .................................................................................+28C/W JA Any Other Pins to GND...............................-0.3V to (V + 0.3V) ................................................................................+1.5C/W CC JC BBOUT+, BBOUT- Short-Circuit Protection...................Indefinite Storage Temperature Range .............................-65C to +150C LBAND IN, VHF IN Input Power....................................+10dBm Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) (derated 35.7mW/C above +70C) ....2857mW A 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 (MAX2170/MAX2171 Typical Application Circuit, V = +2.7V to +3.5V, GND = 0V, BBAGC = RFAGC = +2.4V, RF input terminated CC into 50, BBOUT+ and BBOUT- are open, default register settings, no input signal, VCO locked to default channel, f = 24.576MHz, T = -40C to +85C. Typical values are at V = +3.0V, T = +25C, unless otherwise noted.) REF A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SUPPLY VOLTAGE AND CURRENT Supply Voltage V 2.7 3.0 3.5 V CC Active mode, V = 3V 62 77 CC mA Standby mode, STBY = 0V 3 Supply Current I CC Shutdown mode, STBY = 0V, SHDN ALL bit 5 A set at logic-high RFAGC AND BBAGC RFAGC Input Bias Current At 0.4V and 2.4V -20 +10 A BBAGC Input Bias Current At 0.4V and 2.4V -20 +15 A Minimum attenuation 2.4 RF and Baseband AGC Control V Voltage Maximum attenuation 0.4 SERIAL INTERFACE (SCL, SDA) 0.3 x Input Logic-Level Low V V CC 0.7 x Input Logic-Level High V V CC SDA, SCL Input Current -10 +10 A Output Logic-Level Low 3mA sink current 0.4 V SYSTEM TIMING Signal Path Settling Time From standby mode to active, any band 0.02 ms Adjacent Channel Change Any mode, including VCO tuning 0.5 ms Reference Oscillator Using the MAX2170 EV kit 0.6 ms Turn-On Time to 50ppm 2 MAX2170/MAX2171