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LT5520 Dataheets PDF



Part Number LT5520
Manufacturers Linear Technology
Logo Linear Technology
Description 1.3GHz to 2.3GHz High Linearity Upconverting Mixer
Datasheet LT5520 DatasheetLT5520 Datasheet (PDF)

www.DataSheet4U.com LT5520 1.3GHz to 2.3GHz High Linearity Upconverting Mixer FEATURES s s s s s s s s s s s DESCRIPTIO U APPLICATIO S Wide RF Output Frequency Range: 1.3GHz to 2.3GHz 15.9dBm Typical Input IP3 at 1.9GHz On-Chip RF Output Transformer No External LO or RF Matching Required Single-Ended LO and RF Operation Integrated LO Buffer: –5dBm Drive Level Low LO to RF Leakage: – 41dBm Typical Wide IF Frequency Range: DC to 400MHz Enable Function with Low Off-State Leakage Current Singl.

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www.DataSheet4U.com LT5520 1.3GHz to 2.3GHz High Linearity Upconverting Mixer FEATURES s s s s s s s s s s s DESCRIPTIO U APPLICATIO S Wide RF Output Frequency Range: 1.3GHz to 2.3GHz 15.9dBm Typical Input IP3 at 1.9GHz On-Chip RF Output Transformer No External LO or RF Matching Required Single-Ended LO and RF Operation Integrated LO Buffer: –5dBm Drive Level Low LO to RF Leakage: – 41dBm Typical Wide IF Frequency Range: DC to 400MHz Enable Function with Low Off-State Leakage Current Single 5V Supply Small 16-Lead QFN Plastic Package The LT®5520 mixer is designed to meet the high linearity requirements of wireless and cable infrastructure transmission applications. A high-speed, internally matched, LO amplifier drives a double-balanced mixer core, allowing the use of a low power, single-ended LO source. An RF output transformer is integrated, thus eliminating the need for external matching components at the RF output, while reducing system cost, component count, board area and system-level variations. The IF port can be easily matched to a broad range of frequencies for use in many different applications. The LT5520 mixer delivers 15.9dBm typical input 3rd order intercept point at 1.9GHz with IF input signal levels of –10dBm. The input 1dB compression point is typically 4dBm. The IC requires only a single 5V supply. , LTC and LT are registered trademarks of Linear Technology Corporation. s s s s Wireless Infrastructure Cable Downlink Infrastructure Point-to-Point Data Communications High Linearity Frequency Conversion TYPICAL APPLICATIO 5VDC 1µF 1000pF 39nH EN BPF IF INPUT 4:1 IF + 15pF IF – 220pF 100Ω RF – BPF PA RF OUTPUT RF + 100Ω BIAS VCC1 VCC2 VCC3 POUT, IM3 (dBm/TONE) 220pF 10pF GND 5pF (OPTIONAL) LO INPUT –5dBm LO+ 85Ω 5pF LO – LT5520 5520 F01 Figure 1. Frequency Conversion in Wireless Infrastructure Transmitter 5520f U RF Output Power and Output IM3 vs IF Input Power (Two Input Tones) 10 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –16 IM3 PLO = –5dBm fLO = 1760MHz fIF1 = 140MHz fIF2 = 141MHz fRF = 1900MHz TA = 25°C 4 5520 • F01b U POUT –12 –4 0 –8 IF INPUT POWER (dBm/TONE) 1 LT5520 www.DataSheet4U.com ABSOLUTE (Note 1) AXI U RATI GS U W U PACKAGE/ORDER I FOR ATIO TOP VIEW Supply Voltage ....................................................... 5.5V Enable Voltage ............................. –0.3V to (VCC + 0.3V) LO Input Power (Differential) .............................. 10dBm RF+ to RF – Differential DC Voltage...................... ±0.13V RF Output DC Common Mode Voltage ......... –1V to VCC IF Input Power (Differential) ............................... 10dBm IF+, IF – DC Currents .............................................. 25mA LO+ to LO– Differential DC Voltage .......................... ±1V LO Input DC Common Mode Voltage ............ –1V to VCC Operating Temperature Range .................–40°C to 85°C Storage Temperature Range ................. – 65°C to 125°C Junction Temperature (TJ).................................... 125°C GND 16 15 14 13 GND 1 IF + 2 IF – 3 GND 4 5 6 7 8 17 12 GND 11 RF + 10 RF – 9 GND GND LO– LO+ VCC1 VCC2 UF PACKAGE 16-LEAD (4mm × 4mm) PLASTIC QFN EXPOSED PAD IS GND (PIN 17), MUST BE SOLDERED TO PCB VCC3 EN ELECTRICAL CHARACTERISTICS PARAMETER IF Input Frequency Range LO Input Frequency Range RF Output Frequency Range CONDITIONS MIN TYP DC to 400 900 to 2700 1300 to 2300 MAX UNITS MHz MHz MHz 1900MHz Application: VCC = 5VDC, EN = High, TA = 25°C, IF input = 140MHz at –10dBm, LO input = 1.76GHz at –5dBm, RF output measured at 1900MHz, unless otherwise noted. Test circuit shown in Figure 2. (Notes 2, 3) PARAMETER IF Input Return Loss LO Input Return Loss RF Output Return Loss LO Input Power Conversion Gain Input 3rd Order Intercept Input 2nd Order Intercept LO to RF Leakage LO to IF Leakage Input 1dB Compression IF Common Mode Voltage Noise Figure Internally Biased Single Side Band –10dBm/Tone, ∆f = 1MHz –10dBm, Single-Tone CONDITIONS ZO = 50Ω, with External Matching ZO = 50Ω ZO = 50Ω MIN TYP 20 16 20 –10 to 0 –1 15.9 45 –41 –35 4 1.77 15 MAX UNITS dB dB dB dBm dB dBm dBm dBm dBm dBm VDC dB DC ELECTRICAL CHARACTERISTICS (Test Circuit Shown in Figure 2) VCC = 5VDC, EN = High , TA = 25°C (Note 3), unless otherwise noted. PARAMETER Enable (EN) Low = Off, High = On Turn-On Time (Note 4) Turn-Off Time (Note 4) Input Current VENABLE = 5VDC 2 6 1 10 µs µs µA 5520f 2 U W W W ORDER PART NUMBER LT5520EUF UF PART MARKING 5520 TJMAX = 125°C, θJA = 37°C/W Consult LTC Marketing for parts specified with wider operating temperature ranges. CONDITIONS MIN TYP MAX UNITS www.DataSheet4U.com LT5520 DC ELECTRICAL CHARACTERISTICS (Test Circuit Shown in Figure 2) VCC = 5VDC, EN = High , TA = 25°C (Note 3), unless otherwise noted. PARAMETER Enable = High (On) Enable = Low (Off) Power Supply Requirements (VCC) Supply Voltage Supply Current Shutdown Current VCC = 5VDC EN = Low 4.5 to 5.25 60 1 70 100 VDC mA µA CONDITIONS MIN 3 0.5 TYP MAX UNITS VD.


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