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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC6946 датащи(PDF) 30 Page - Linear Technology |
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LTC6946 датащи(HTML) 30 Page - Linear Technology |
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30 / 30 page  LTC6946 30 6946fa Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2011 LT 1111 REV A • PRINTED IN USA RELATED PARTS TYPICAL APPLICATION PART NUMBER DESCRIPTION COMMENTS LTC5540/LTC5541 LTC5542/LTC5543 High Dynamic Range Down Mixers 8dB Conversion Gain, 26.4dBm IIP3, 9.6dB NF, 600MHz to 4GHz LTC5590/LTC5591 LTC5592/LTC5593 High Linearity Dual Mixers 600MHz to 4.5GHz, 8.5dB Gain, 26.2dBm IIP3, 9.9dB NF LTC5569 Broadband Dual Mixer 300MHz to 4GHz, 26.8dB IIP3, 2dB Gain, 11.7dB NF, 600mW Power LTC5588-1 Ultrahigh OIP3 I/Q Modulator 200MHz to 6GHz, 31dBm OIP3, –160.6dBm/Hz Noise Floor LT ®5575 Direct Conversion I/Q Demodulator 800MHz to 2.7GHz, 22.6dBm IIP3, 60dBm IIP3, 12.7dB NF LTC6946-2 Driving a Passive Downconverting Mixer VREFO+ REFO STAT CS SCLK SDI SDO VD+ VVCO+ GND CMA CMB CMC GND TB TUNE LTC6946-2 SPI BUS 3.3V 470pF 51.1Ω + 15Ω 5V RZ 1μF 3.3V LOOP COMPENSATION COMPONENT VALUES ARE APPLICATION SPECIFIC DEPENDING ON THE LO FREQUENCY RANGE AND STEP SIZE AND THE PHASE NOISE OF THE REFERENCE CI 0.01μF 0.1μF 3.3V 3.3V 1μF 0.01μF 0.01μF 2.2μF CP 0.01μF BALUN TDK HHM1525 3.3V LO2 LO1 LOBIAS LOSEL VCC3 IFBIAS IFGND SHDN GND GND GND LTC5541 GND GND VCC2 CT RF VCC1 1μF 3.3V 30nH IF+ 150nH IF– 470pF 10MHz REFERENCE TOKO 4DFB-1842N-10 22pF 22pF 1μF 3.3V 3.3V LO = 1842MHz 0.1μF ADC 150nH 1nF 140MHz SAW 140MHz BPF 1.5pF 2.2pF LNA IMAGE BPF RF IN 1952MHz TO 2012MHZ 3.3V 22pF 1nF 6946 TA03 RF BLOCKER POWER (dBm) –20 9 10 12 13 14 –10 0 5 18 6946 TA03b 11 –15 –5 15 16 17 RF = 1982MHz BLOCKER = 2082MHz LO = LTC6946-2 LO = CLEAN LAB SOURCE LTC5541 Noise Figure vs Blocker Power and LO Signal Source LTC6946-2 Mixer Application Phase Noise OFFSET FREQUENCY (Hz) –130 –140 –110 –90 –150 –120 –100 100 10k 100k 1M 10M 6946 TA03c –160 1k RMS NOISE = 0.270° fRF = 1842MHz fPFD = 2MHz OD = 2 fSTEP = 1MHz |
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