LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer FEATURES DESCRIPTIO The LT 5519 mixer is designed to meet the high linearity n Wide RF Frequency Range: 0.7GHz to 1.4GHz requirements of wireless and cable infrastructure trans- n 17.1dBm Typical Input IP3 at 1GHz mission systems. A high speed, internally 50W matched, n On-Chip RF Output Transformer LO amplifier drives a double-balanced mixer core, allow- n On-Chip 50W Matched LO and RF Ports ing the use of a low power, single-ended LO source. An RF n Single-Ended LO and RF Operation output transformer is integrated, thus eliminating the n Integrated LO Buffer: 5dBm Drive Level need for external matching components at the RF output, n Low LO to RF Leakage: 44dBm Typical while reducing system cost, component count, board area n Noise Figure: 13.6dB and system-level variations. The IF port can be easily n Wide IF Frequency Range: 1MHz to 400MHz matched to a broad range of frequencies for use in many n Enable Function with Low Off-State Leakage Current different applications. n Single 5V Supply n Small 16-Lead QFN Plastic Package The LT5519 mixer delivers +17.1dBm typical input 3rd U order intercept point at 1GHz with IF input signal levels of APPLICATIO S 10dBm. The input 1dB compression point is typically n +5.5dBm. The IC requires only a single 5V supply. Wireless Infrastructure n Cable Downlink Infrastructure , LTC and LT are registered trademarks of Linear Technology Corporation. n Point-to-Point and Point-to-Multipoint Data Communications n High Linearity Frequency Conversion TYPICAL APPLICATIO 5V DC 1F 1000pF RF Output Power, IM3 and IM2 39nH vs IF Input Power (Two Input Tones) 10 EN V V V CC1 CC2 CC3 0 P OUT BIAS 10pF 10 100 BPF 220pF LT5519 4:1 20 f = 1000MHz RF + + IF RF 30 P = 5dBm LO BPF 33pF f = 1140MHz LO 40 f = 140MHz IF1 PA IM3 IF RF f = 141MHz 50 IF2 220pF 100 T = 25C A 60 IM2 70 GND 80 5pF 5pF 90 85 16 12 4 0 4 8 + LO LO (OPTIONAL) IF INPUT POWER (dBm/TONE) 5519 F01a LO INPUT 5519 F01b 5dBm Figure 1. Frequency Conversion in Wireless Infrastructure Transmitter 5519f 1 P , IM3, IM2 (dBm/TONE) OUT U ULT5519 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW ORDER PART Supply Voltage ....................................................... 5.5V NUMBER Enable Voltage ............................. 0.3V to (V + 0.3V) 16 15 14 13 CC GND 1 12 GND LO Input Power (Differential) ............................ +10dBm LT5519EUF + + + IF 2 11 RF LO to LO Differential DC Voltage .......................... 1V 17 IF RF 3 10 + LO and LO DC Common Mode Voltage ...... 1V to V CC GND GND 4 9 IF Input Power (Differential) ............................. +10dBm 5 6 7 8 UF PART + IF and IF DC Currents ........................................ 25mA MARKING + RF to RF Differential DC Voltage...................... 0.13V UF PACKAGE + 16-LEAD (4mm 4mm) PLASTIC QFN 5519 RF and RF DC Common Mode Voltage ...... 1V to V CC T = 125 C, q = 37 C/W JMAX JA Operating Temperature Range .................40 C to 85 C EXPOSED PAD (PIN 17) IS GND MUST BE SOLDERED TO PCB Storage Temperature Range ................. 65 C to 125 C Junction Temperature (T ).................................... 125 C Consult LTC Marketing for parts specified with wider operating temperature ranges. J ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS IF Input Frequency Range 1 to 400 MHz LO Input Frequency Range 300 to 1800 MHz RF Output Frequency Range 700 to 1400 MHz 1GHz Application: V = 5V , EN = High, T = 25 C, IF input = 140MHz at 10dBm, LO input = 1.14GHz at 5dBm, RF output measured CC DC A at 1GHz, unless otherwise noted. (Test circuit shown in Figure 2) (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS IF Input Return Loss Z = 50W , with External Matching 20 dB O LO Input Return Loss Z = 50W 17 dB O RF Output Return Loss Z = 50W 20 dB O LO Input Power 10 to 0 dBm Conversion Gain 0.6 dB Input 3rd Order Intercept 10dBm/Tone, D f = 1MHz 17.1 dBm Input 2nd Order Intercept 10dBm, Single Tone 48 dBm LO to RF Leakage 44 dBm LO to IF Leakage 40 dBm Input 1dB Compression 5.5 dBm IF Common Mode Voltage Internally Biased 1.77 V DC Noise Figure Single-Side Band 13.6 dB 5519f 2 GND EN V LO CC1 + LO V CC2 GND V CC3 U WWW