LO LEAKAGE (dBm) LT5557 400MHz to 3.8GHz 3.3V Active Downconverting Mixer Fea T Descrip T n Wide RF Frequency Range: 400MHz to 3.8GHz* The LT 5557 active mixer is optimized for high linearity, n High Input IP3: 25.6dBm at 900MHz wide dynamic range downconverter applications. The 24.7dBm at 1950MHz IC includes a high speed differential LO buffer amplifier 23.7dBm at 2.6GHz driving a double-balanced mixer. Broadband, integrated n Conversion Gain: 3.3dB at 900MHz transformers on the RF and LO inputs provide single-ended 2.9dB at 1950MHz 50 interfaces. The differential IF output allows convenient n 3dBm LO Drive Level interfacing to differential IF filters and amplifiers, or is n Low LO Leakage easily matched to drive a single-ended 50 load, with or n Low Noise Figure: 10.6dB at 900MHz without an external transformer. 11.7dB at 1950MHz The RF input is internally matched to 50 from 1.6GHz n Low Power: 3.3V/269mW to 2.3GHz, and the LO input is internally matched to 50 n 50 Single-Ended RF and LO Ports from 1GHz to 5GHz. The frequency range of both ports n Very Few External Components is easily extended with simple external matching. The IF n 16-Lead (4mm 4mm) QFN Package output is partially matched and usable for IF frequencies up to 600MHz. a T The LT5557s high level of integration minimizes the total n Cellular, CDMA, WCDMA, TD-SCDMA and UMTS solution cost, board space and system-level variation. Infrastructure n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of WiMAX Linear Technology Corporation. All other trademarks are the property of their respective n Wireless Infrastructure Receiver owners. *Operation over a wider frequency range is possible with reduced performance. Consult factory for information and assistance. n Wireless Infrastructure PA Linearization n 900MHz/2.4GHz/3.5GHz WLAN Typical a T High Signal Level Downmixer for Multi-Carrier Wireless Infrastructure Conversion Gain, IIP3, SSB NF and LO Leakage vs RF Frequency LO INPUT 3dBm (TYP) 26 0 24 IIP3 LT5557 22 10 LOW SIDE LO 20 IF = 240MHz 18 P = 3dBm 20 4.7pF LO T = 25C A 16 V = 3.3V CC + 100nH 14 30 IF SSB NF 12 1nF IF 40 10 150nH OUTPUT LO-IF 4.7pF 8 RF RF 240MHz LO-RF INPUT 6 50 4 BIAS IF G C 2 60 100nH V V GND EN CC2 CC1 1700 1800 1900 2000 2100 2200 RF FREQUENCY (MHz) 3.3V 5557 TA01b 1nF 1F 5557 TA01a 5557fc 1 G (dB), NF (dB), IIP3 (dBm) C ion pplica ions pplica ion uresLT5557 a Te Maxi Mu M r a T p in c F T (Note 1) + TOP VIEW Supply Voltage (V , V , IF , IF ) ..........................4V CC1 CC2 16 15 14 13 Enable Voltage .................................0.3V to V + 0.3V CC NC 1 12 GND + LO Input Power (380MHz to 4.2GHz) ................. +10dBm NC 2 11 IF 17 RF 3 10 IF LO Input DC Voltage ............................... 1V to V + 1V CC NC 4 9 GND RF Input Power (400MHz to 3.8GHz) ................. +15dBm 5 6 7 8 Continuous RF Input Power UF PACKAGE 16-LEAD (4mm 4mm) PLASTIC QFN (400MHz to 3.8GHz) .......................................... +12dBm T = 125C, = 8C/W, = 37C/W JMAX JC JA RF Input DC Voltage ............................................... 0.1V EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB Operating Temperature Range .................40C to 85C CAUTION: This part is sensitive to electrostatic discharge Storage Temperature Range .................. 65C to 125C (ESD). It is very important that proper ESD precautions Junction Temperature (T ) .................................... 125C J be observed when handling the LT5557. o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE 40C to 85C LT5557EUF PBF LT5557EUF TRPBF 5557 16-Lead (4mm 4mm) Plastic QFN 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: