LT5526 High Linearity, Low Power Downconverting Mixer FEATURES DESCRIPTIO Operation up to 2GHz The LT 5526 is a low power broadband mixer optimized Broadband RF, LO and IF Operation for high linearity applications such as point-to-point data High Input IP3: +16.5dBm at 900MHz transmission, cable infrastructure and wireless infrastruc- Typical Conversion Gain: 0.6dB at 900MHz ture systems. The device includes an internally matched SSB Noise Figure: 11dB at 900MHz high speed LO amplifier driving a double-balanced active On-Chip 50 LO Match mixer core. An integrated RF buffer amplifier provides Integrated LO Buffer: 5dBm Drive Level excellent LO-RF isolation. The RF and IF ports can be easily High LO-RF and LO-IF Isolation matched across a broad range of frequencies for use in a Low Supply Current: 28mA Typ wide variety of applications. Enable Function The LT5526 offers a high performance alternative to Single 5V Supply passive mixers. Unlike passive mixers which have conver- 16-Lead QFN (4mm 4mm) Package sion loss and require high LO drive levels, the LT5526 U delivers conversion gain at significantly lower LO input APPLICATIO S levels and is much less sensitive to LO power level variations. Point-to-Point Data Communication Systems , LTC and LT are registered trademarks of Linear Technology Corporation. Wireless Infrastructure Cable Downlink Infrastructure High Linearity Receiver Applications TYPICAL APPLICATIO High Signal Level Frequency Downconversion IF Output Power and IM3 vs V CC RF Input Power (Two Input Tones) 5V DC 0 EN V V CC2 CC1 10 BIAS 20 P OUT 900MHz 900MHz 140MHz 30 + + RF IF LNA VGA ADC 40 50 RF IF 60 70 T = 25C A f = 140MHz IF 80 f = 900MHz IM3 RF GND f = 760MHz LO 90 P = 5dBm LO + 100 LT5526 LO LO 20 15 10 5 0 RF INPUT POWER (dBm/TONE) 5526 TA02 5526 TA01 LO INPUT 5dBm 5526f 1 OUTPUT POWER (dBm/TONE) U ULT5526 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) Supply Voltage ...................................................... 5.5V TOP VIEW ORDER PART Enable Voltage ............................... 0.3V to V + 0.3V NUMBER CC 16 15 14 13 LO Input Power ............................................... +10dBm LT5526EUF NC 1 12 GND + LO to LO Differential DC Voltage ......................... 1V + + RF 2 11 IF RF Input Power ................................................ +10dBm 17 RF 3 10 IF + RF to RF Differential DC Voltage ....................... 0.7V NC 4 9 GND Operating Temperature Range ................ 40C to 85C 5 6 7 8 UF PART Storage Temperature Range ................. 65C to 125C MARKING Junction Temperature (T )................................... 125C J UF PACKAGE 16-LEAD (4mm 4mm) PLASTIC QFN 5526 T = 125C, = 37C/W JMAX JA EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB. NC PINS SHOULD BE GROUNDED Consult LTC Marketing for parts specified with wider operating temperature ranges. DC ELECTRICAL CHARACTERISTICS V = 5V, EN = 3V, T = 25C (Note 3), unless otherwise noted. Test circuit shown in Figure 1. CC A PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply Requirements (V ) CC Supply Voltage 3.6 5 5.3 V Supply Current V = 5V 28 33 mA CC Shutdown Current EN = Low 100 A Enable (EN) Low = Off, High = On EN Input High Voltage (On) 3V EN Input Low Voltage (Off) 0.3 V Enable Pin Input Current EN = 5V 55 A EN = 0V 0.01 A Turn-On Time (Note 5) 3 s Turn-Off Time (Note 5) 6 s AC ELECTRICAL CHARACTERISTICS (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS RF Input Frequency Range (Note 4) Requires RF Matching 0.1 to 2000 MHz LO Input Frequency Range (Note 4) Requires DC Blocks 0.1 to 2500 MHz IF Output Frequency Range (Note 4) Requires IF Matching 0.1 to 1000 MHz V = 5V, EN = 3V, T = 25C. Test circuits shown in Figures 1 and 2. (Notes 2, 3) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS RF Input Return Loss Z = 50 , External Match 15 dB O LO Input Return Loss Z = 50 , External DC Blocks 15 dB O IF Output Return Loss Z = 50 , External Match 15 dB O LO Input Power 10 to 0 dBm 5526f 2 EN NC + V LO CC1 V LO CC2 NC NC U W U U WWW