LTC5577 Datasheet | Linear Technology

Features n+30d Bm IIP3 n +15d Bm Input P1d B n0d B Conversion Gain n Wideband Differential IF Output n Very Low 2 × 2 and 3 × 3 Spurs n IF Frequency Range Up to 1.5GHz n Low LO-RF Leakage n LO Input 50Ω Matched when Shutdown n - 40°C to 105°C Operation (TC) n Very Small Solution Size n16-Lead (4mm × 4mm) QFN package Applications n Wireless Infrastructure Receivers n DPD Observation Receivers n CATV Infrastructure LTC5577 300MHz to 6GHz High Signal Level Active Downconverting Mixer Description The LTC®5577 active mixer is optimized for RF downconverting applications that require high input signal handling capability and wide bandwidth. The wideband IF output uses external resistors to set the output impedance, allowing the flexibility to match directly into differential IF loads, such as filters and amplifiers. The part is characterized and specified with a 100Ω differential output impedance, although it can be used with output impedances ranging from 50Ω to 400Ω, with higher gain and reduced IIP3 and P1d B at the higher impedance levels. The IF output is usable up to 1.5GHz. In receiver applications, the high input P1d B and IIP3 allow the use of higher gain low noise amplifiers, resulting in higher receiver sensitivity. Integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces, while minimizing the solution size. 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 Wideband Downconverting Mixer with 1GHz IF Bandwidth and +15d Bm Input P1d B into 100Ω Load 100Ω IF LOAD 50Ω 50Ω 1n F 560n H 115Ω 560n H 115Ω 1n F 8.2p F RF 0.7p F LTC5577 IF+ EN EN BIAS VCC 1n F - LO 3.9p F 1n F IADJ 5577 TA01a 3.3V 180m A IIP3 (d Bm) Voltage Conversion Gain and IIP3 vs IF Output Frequency 33 IIP3 30 9 8 RF = 1.6GHz TO...