Electrical Specifications Subject to Change LTC5542 1.6GHz to 2.7GHz High Dynamic Range Downconverting Mixer DESCRIPTION FEATURES n n n n n n n n n n n n n Conversion Gain: 8dB at 2.4GHz IIP3: 26.8dBm at 2.4GHz Noise Figure: 9.9dB at 2.4GHz High Input P1dB 3.3V Supply, 660mW Power Consumption Shutdown Pin 50Ω Single-Ended RF and LO Inputs LO Inputs 50Ω Matched when Shutdown High Isolation LO Switch 0dBm LO Drive Level High LO-RF and LO-IF Isolation Small Solution Size 20-Lead (5mm × 5mm) QFN package The LTC®5542 is part of a family of high dynamic range passive downconverting mixers covering the 700MHz to 4GHz frequency range. The LTC5542 is optimized for 1.6GHz to 2.7GHz RF applications. The LO frequency must fall within the 1.7GHz to 2.5GHz range for optimum performance. A typical application is a LTE or WiMAX receiver with a 2.3GHz to 2.7GHz RF input and low-side LO. The LTC5542 is designed for 3.3V operation, however; the IF amplifier can be powered by 5V for the highest P1dB. An integrated SPDT LO switch with fast switching accepts two active LO signals, while providing high isolation. The LTC5542’s high conversion gain and high dynamic range enable the use of lossy IF filters in high-selectivity receiver designs, while minimizing the total solution cost, board space and system-level variation. APPLICATIONS n n Wireless Infrastructure Receivers (LTE, W-CDMA. TD-SCDMA, UMTS, GSM1800) High Dynamic Range Downmixer Applications High Dynamic Range Downconverting Mixer Family L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. PART# RF RANGE LO RANGE LTC5540 600MHz –1.3GHz 700MHz – 1.2GHz LTC5541 1.3GHz – 2.3GHz 1.4GHz – 2.0GHz LTC5542 1.6GHz – 2.7GHz 1.7GHz – 2.5GHz LTC5543 2.3GHz – 4GHz 2.4GHz – 3.6GHz TYPICAL APPLICATION Wideband Receiver 190MHz SAW 1nF VCCIF 3.3V or 5V 1μF 22pF IF AMP 1nF 150nH 150nH ADC IF – 4.7pF LO2 LTC5542 IF RF LNA ALTERNATE LO FOR FREQUENCY-HOPPING LO 0.7pF 4.7pF SHDN (0V/3.3V) BIAS SHDN VCC2 VCC 3.3V 1μF VCC1 22pF VCC3 LO1 LOSEL LO SELECT (0V/3.3V) 28 8.8 IIP3 26 8.6 24 8.4 SYNTH 2 SYNTH 1 LO 2160MHz 5542 TA01 GC (dB) RF 2300MHz TO 2400MHz IMAGE BPF 22pF 9.0 22 ±30MHz 8.2 8.0 20 GC 18 7.8 f = 2160MHz 7.6 PLO = 0dBm LO 7.4 RF = 2350 ±50MHz TEST CIRCUIT IN FIGURE 1 7.2 16 14 IIP3 (dBm), SSB NF (dB) IF+ Wideband Conversion Gain, IIP3 and NF vs IF Output Frequency 190MHz BPF 12 NF 10 7.0 8 140 150 160 170 180 190 200 210 220 230 240 IF OUTPUT FREQUENCY (MHz) 5542 TA02 5542p 1 LTC5542 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) IFGND GND IF– IFBIAS IF+ TOP VIEW Mixer Supply Voltage (VCC1, VCC2)...........................3.8V LO Switch Supply Voltage (VCC3).............................3.8V IF Supply Voltage (IF+, IF –) ......................................5.5V Shutdown Voltage (SHDN) ................–0.3V to VCC +0.3V LO Select Voltage (LOSEL)................–0.3V to VCC +0.3V LO1, LO2 Input Power (1GHz to 3GHz) ...................9dBm LO1, LO2 Input DC Voltage ....................................±0.5V RF Input Power (1GHz to 3GHz) ...........................15dBm RF Input DC Voltage ............................................... ±0.1V Operating Temperature Range .................–40°C to 85°C Storage Temperature Range .................. –65°C to 150°C Junction Temperature (TJ) .................................... 150°C 20 19 18 17 16 15 LO2 NC 1 14 VCC3 RF 2 21 GND CT 3 13 GND 7 8 9 10 LOSEL GND 6 VCC1 11 LO1 VCC2 12 GND SHDN 5 LOBIAS GND 4 UH PACKAGE 20-LEAD (5mm s 5mm) PLASTIC QFN TJMAX = 150°C, θJA = 34°C/W EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC5542IUH#PBF LTC5542IUH#TRPBF 5542 20-Lead (5mm x 5mm) Plastic QFN –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ AC ELECTRICAL CHARACTERISTICS VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3, 4) PARAMETER CONDITIONS MIN LO Input Frequency Range RF Input Frequency Range Low-Side LO High-Side LO TYP MAX UNITS 1700 to 2500 MHz 1900 to 2700 1600 to 2300 MHz MHz 5 to 500 MHz IF Output Frequency Range Requires External Matching RF Input Return Loss ZO = 50Ω, 1600MHz to 2700MHz >12 dB LO Input Return Loss ZO = 50Ω, 1700MHz to 2500MHz >12 dB IF Output Return Loss Requires External Matching >12 dB LO Input Power fLO = 1700MHz to 2500MHz LO to RF Leakage fLO = 1700MHz to 2500MHz <–32 dBm LO to IF Leakage fLO = 1700MHz to 2500MHz <–40 dBm LO Switch Isolation LO1 Selected, 1700MHz < fLO < 2500MHz LO2 Selected, 1700MHz < fLO < 2500MHz 49 52 dB dB RF to LO Isolation fRF = 1600MHz to 2700MHz >50 dB RF to IF Isolation fRF = 1600MHz to 2700MHz >35 –4 0 6 dBm dB 5542p 2