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LT5517 Datasheet(PDF) 1 Page - Linear Technology |
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LT5517 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LT5517 1 5517f BPF 5V VCC BPF RF+ RF – LPF LT5517 IOUT + IOUT – 0 ° 2xLO EN ENABLE 2xLO INPUT LPF DSP QOUT + QOUT – 90 ° ÷2 5517 F01 LNA VGA VGA s Wireless Infrastructure s High Linearity Direct Conversion I/Q Receiver s High Linearity I/Q Demodulator , LTC and LT are registered trademarks of Linear Technology Corporation. s RF Input Frequency Range: 40MHz to 900MHz s High IIP3: 21dBm at 800MHz s High IIP2: 58dBm at 800MHz s I/Q Gain Mismatch: 0.3dB Max s I/Q Phase Mismatch: 0.7 ° s Noise Figure: 12.4dB at 800MHz s Conversion Gain: 3.3dB at 800MHz s Baseband Bandwidth: 130MHz s Single Ended, 50 Ω Matched 2XLO Input s Shutdown Mode s 16-Lead QFN (4mm × 4mm) Package with Exposed Pad 40MHz to 900MHz Quadrature Demodulator Figure 1. High Signal-Level I/Q Demodulator for 450MHz Infrastructure Receiver I/Q Output Power, IM3, IM2 vs RF Input Power The LT ®5517 is a 40MHz to 900MHz quadrature demodu- lator optimized for high linearity receiver applications where high dynamic range is important. It is suitable for communications receivers where an RF or IF signal is directly converted into I and Q baseband signals with a bandwidth up to 130MHz. The LT5517 incorporates bal- anced I and Q mixers, LO buffer amplifiers and a precision, broadband quadrature generator derived from an on-chip divide-by-two circuit. The superior linearity and low noise performance of the LT5517 is achieved across its full frequency range. A well- balanced divide-by-two circuit generates precision quadra- ture LO carriers to drive the I mixer and the Q mixer. Consequently, the outputs of the I-channel and the Q-channel are well matched in amplitude, and their phases are 90 ° apart. The LT5517 also provides excellent 50Ω impedance matching at the 2XLO port across its entire frequency range. RF INPUT POWER (dBm) –18 –100 –80 –60 –40 –20 0 20 POUT IM3 IM2 –14 –10 –6 –2 5517 F01b 2 TA = 25°C P2XLO = –10dBm f2XLO = 1602MHz fRF1 = 799.9MHz fRF2 = 800.1MHz FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO |
Similar Part No. - LT5517_15 |
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Similar Description - LT5517_15 |
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