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LTC1043CN Datasheet(PDF) 11 Page - Linear Technology |
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LTC1043CN Datasheet(HTML) 11 Page - Linear Technology |
11 / 16 page LTC1043 11 1043fa Lock-In Amplifier (= Extremely Narrow-Band Amplifier) 50MHz Termal RMS/DC Converter LTC1043 • A013 13 1/4 LTC1043 T1 = TF5SX17ZZ, TOROTEL RT = YSI THERMISTOR 44006 ≈ 6.19k AT 37.5°C MATCH 0.05% 6.19k = VISHAY S-102 OPERATE LTC1043 WITH ±5V SUPPLIES LOCK-IN AMPLIFIER TECHNIQUE USED TO EXTRACT VERY SMALL SIGNALS BURIED INTO NOISE 5V –5V 2 6.19k 100k 10k* 10k* 100Ω 0.01µF47µF 6.19k 1 4 3 6.19k T1 500Hz SINE DRIVE THERMISTOR BRIDGE IS THE SIGNAL SOURCE SYNCHRONOUS DEMODULATOR RT 3 6 – + LT1007 5V 5V –5V ZERO CROSSING DETECTOR 2 3 4 1 8 1k 0.002 PHASE TRIM 50k 10k 7 5V –5V 30pF 3 2 1 8 1M 1µF – + LM301A 5V –5V 2 3 4 6 – + LT1012 VOUT = 1000 • DC BRIDGE SIGNAL 12 14 16 – + LT1011 * + LTC1043 • A14 30k* 30k* 100k* 301Ω* 10k DC OUTPUT 0V TO 3.5V 10k 10k RED RED T1B *1% RESISTOR T2B 1A N T2 T2A GRN 300mV 10VRMS INPUT 0.01µF GRN BRN CALIBRATION ADJUST 20k 5V 5V 5V 10k 10k 3 2 4 1 8 5 6 7 2% ACCURACY DC 50MHZ 100:1 CREST FACTOR CAPABILITY T1 TO T2 = YELLOW SPRINGS INST. CO. THERMISTOR COMPOSITE ENCLOSE T1 AND T2 IN STYROFOAM 3 2 4 6 1µF 1µF 1µF 0.01µF 1µF 1/2 LTC1043 5 15 5V 18 17 16 – + – + LT1013 LT1013 TYPICAL APPLICATIO S |
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