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LT1021DCS8-10 Datasheet(PDF) 12 Page - Linear Technology |
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LT1021DCS8-10 Datasheet(HTML) 12 Page - Linear Technology |
12 / 16 page ![]() 12 LT1021 1021fc TYPICAL APPLICATIONS Boosted Output Current with No Current Limit Boosted Output Current with Current Limit Ultraprecise Current Source LT1021-10 OUT IN TRIM GND 4.32k VOUT = 10.24V VIN 5k V – = –15V* *MUST BE WELL REGULATED dVOUT dV – = 15mV V 1021 TA12 Trimming 10V Units to 10.24V CMOS DAC with Low Drift Full-Scale Trimming** LT1021-10 TRIM GND OUT LT1236 TA15 – + 1.2k R2 40.2 Ω 1% R1 4.99k 1% REF CMOS DAC 7520, ETC IOUT FB 30pF LT1007C R4* 100 Ω FULL-SCALE ADJUST R3 4.02K 1% 10V F.S. –15V TC LESS THAN 200ppm/ °C NO ZERO ADJUST REQUIRED WITH LT1007 (V0S ≤ 60µV) * ** LT1021-7 OUT IN 2 *LOW TC 3 4 7 GND –15V 15V TRIM 100 Ω 15V 6 6.98k* 0.1% 17.4k 1% 1021 TA07 LT1001 IOUT = 1mA REGULATION < 1ppm/V COMPLIANCE = –13V TO 7V LT1021 OUT V+ ≥ (VOUT + 1.8V) GND IN 1021 TA05 2N2905 10V AT 100mA 2 µF SOLID TANT R1 220 Ω + LT1021 OUT GND IN 1021 TA06 2N2905 10V AT 100mA 2 µF SOLID TANT D1* LED V + ≥ VOUT + 2.8V 8.2 Ω R1 220 Ω *GLOWS IN CURRENT LIMIT, DO NOT OMIT + Operating 5V Reference from 5V Supply 2-Pole Lowpass Filtered Reference LT1021-5 OUT IN GND 1021 TA16 1N914 1N914 ≈8.5V C2* 5 µF C1* 5 µF 5V REFERENCE 5V LOGIC SUPPLY CMOS LOGIC GATE** fIN ≥ 2kHz* FOR HIGHER FREQUENCIES C1 AND C2 MAY BE DECREASED PARALLEL GATES FOR HIGHER REFERENCE CURRENT LOADING * ** + LT1021 OUT IN GND 1021 TA13 – + R1 36k 1 µF MYLAR 0.5 µF MYLAR R2 36k LT1001 VIN VIN VREF –VREF f = 10Hz TOTAL NOISE ≤2µVRMS 1Hz ≤ f ≤10kHz |
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