LT5525 High Linearity, Low Power Downconverting Mixer FEATURES DESCRIPTIO Wide Input Frequency Range: 0.8GHz to 2.5GHz* The LT 5525 is a low power broadband mixer optimized Broadband LO and IF Operation for high linearity applications such as point-to-point data High Input IP3: +17.6dBm at 1900MHz transmission, high performance radios and wireless infra- Typical Conversion Gain: 1.9dB at 1900MHz structure systems. The device includes an internally 50 High LO-RF and LO-IF Isolation matched high speed LO amplifier driving a double-bal- SSB Noise Figure: 15.1dB at 1900MHz anced active mixer core. An integrated RF buffer amplifier Single-Ended 50 RF and LO Interface provides excellent LO-RF isolation. The RF input balun and Integrated LO Buffer: 5dBm Drive Level all associated 50 matching components are integrated. Low Supply Current: 28mA Typ The IF ports can be easily matched across a broad range Enable Function of frequencies for use in a wide variety of applications. Single 5V Supply The LT5525 offers a high performance alternative to 16-Lead QFN (4mm 4mm) Package passive mixers. Unlike passive mixers, which require high U LO drive levels, the LT5525 operates at significantly lower APPLICATIO S LO input 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 *Operation over a wider frequency range is achievable with reduced performance. Consult factory for more information. High Performance Radios High Linearity Receiver Applications TYPICAL APPLICATIO High Signal Level Frequency Downconversion IF Output Power and IM3 vs RF Input Power (Two Input Tones) V CC 5V DC 0.01F 0 V EN CC2 V CC1 100pF 10 BIAS 20 P OUT 1900MHz 1900MHz 140MHz 30 150nH + + RF IF 4:1 LNA VGA ADC 40 1.2pF 50 150nH IF 60 RF 70 T = 25C A f = 1900MHz RF 80 f = 1760MHz LO GND IM3 f = 140MHz 90 IF P = 5dBm LO + 100 LT5525 LO LO 20 15 10 5 0 RF INPUT POWER (dBm/TONE) 5525 TA01 LO INPUT 5525 TA02 5dBm 5525f 1 OUTPUT POWER (dBm/TONE) U ULT5525 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 LT5525EUF NC 1 12 GND + LO to LO Differential DC Voltage ......................... 1V + + RF 2 11 IF + LO and LO Common Mode DC Voltage... 0.5V to V 17 CC RF 3 10 IF RF Input Power ................................................ +10dBm NC 4 9 GND + RF to RF Differential DC Voltage ..................... 0.13V 5 6 7 8 UF PART + RF and RF Common Mode DC Voltage ... 0.5V to V CC MARKING + IF and IF Common Mode DC Voltage................... 5.5V UF PACKAGE 16-LEAD (4mm 4mm) PLASTIC QFN Operating Temperature Range ................ 40C to 85C 5525 T = 125C, = 37C/W JMAX JA Storage Temperature Range ................. 65C to 125C EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB. Junction Temperature (T )................................... 125C J 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 (Note 6) 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 0.1 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 Below 1300MHz 800 to 2500 MHz LO Input Frequency Range (Note 4) 500 to 3000 MHz IF Output Frequency Range (Note 4) Requires IF Matching 0.1 to 1000 MHz V = 5V, EN = 3V, T = 25C. Test circuit shown in Figure 1. (Notes 2, 3) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS RF Input Return Loss Z = 50 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 5525f 2 EN NC + V LO CC1 V LO CC2 NC NC U W U U WWW