LT5578 0.4GHz to 2.7GHz High Linearity Upconverting Mixer FEATURES DESCRIPTION n High Output IP3: 27dBm at 0.9GHz The LT 5578 mixer is a high performance upconverting 24.3dBm at 1.95GHz mixer optimized for frequencies in the 0.4GHz to 2.7GHz n Low Noise Floor: 158dBm/Hz (P = 5dBm) range. The single-ended LO input and RF output ports OUT n High Conversion Gain: 1.4dB at 0.9GHz simplify board layout and reduce system cost. The mixer n Noise Figure: 8.6dB needs only 1dBm of LO power and the balanced design n Low LO-RF Leakage: 43dBm results in low LO signal leakage to the RF output. At n Single-Ended RF and LO Ports 1.95GHz operation, the LT5578 provides conversion gain n Low LO Drive Level: 1dBm of 0.7dB, high OIP3 of 24.3dBm and a low noise oor of n Single 3.3V Supply 158dBm/Hz at a 5dBm RF output signal level. n 5mm 5mm QFN24 Package The LT5578 offers a high performance alternative to pas- (Pin Compatible with LT5579) sive mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5578 delivers APPLICATIONS conversion gain at signi cantly lower LO input levels and n GSM 900PCS/1800PCS and W-CDMA Infrastructure is less sensitive to LO power level variations. The lower n LTE and WiMAX Basestations LO drive level requirements, combined with the excellent n Wireless Repeaters LO leakage performance, translate into lower LO signal n Public Safety Radios contamination of the output signal. 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. TYPICAL APPLICATION Frequency Upconversion in LTE Transmitter LO INPUT 1dBm Gain, NF and OIP3 vs RF Output Frequency 2.7pF 6.8pF 30 OIP3 LO LT5578 25 GND 13.7 20 T = 25C BIAS A f = 140MHz IF RF f = f f LO RF IF IF 700MHz 100nH 15 TC4-1W+ 220pF 140MHz TO 950MHz 4:1 + 22nH 13nH IF RF SSB NF 10 2pF 2.7pF 39pF IF 5 GAIN 220pF 100nH 0 V CC 5579 TA01a 650 700 750 800 850 900 950 1000 V CC RF OUTPUT FREQUENCY (MHz) 13.7 3.3V 10F 100F 1nF 5578 TA01b 5578f 1 GAIN (dB), NF (dB), OIP3 (dBm)LT5578 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage ............................................................4V TOP VIEW LO Input Power ....................................................10dBm 24 23 22 21 20 19 LO Input DC Current ..............................................30mA GND 1 18 GND RF Output DC Current ............................................45mA GND 2 17 GND IF Input Power (Differential) .................................18dBm + + IF 3 16 GND IF , IF DC Currents ...............................................45mA 25 IF 4 15 RF T .................................................................... 150C JMAX GND GND 5 14 Operating Temperature Range.................. 40C to 85C GND 6 13 GND Storage Temperature Range ................... 65C to 150C 7 8 9 10 11 12 UH PACKAGE 24-LEAD (5mm 5mm) PLASTIC QFNs T = 150C, = 34C/W JMAX JA EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT5578IUH PBF LT5578IUH TRPBF 5578 40C to 85C 24-Lead (5mm 5mm) Plastic QFN Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: