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LT1236BIS8-5 Datasheet(PDF) 10 Page - Linear Technology |
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LT1236BIS8-5 Datasheet(HTML) 10 Page - Linear Technology |
10 / 12 page 10 LT1236 TYPICAL APPLICATIONS LT1236-10 OUT IN GND LT1236 TA16 15V 8.87k 1% 1.24k 1% 10k 1% D1 1N457 50k TC TRIM* 10k 1% D2 1N457 50k 200k 1% 50k ROOM TEMP TRIM 10.36k 1% 8.45k 1mA TRIMS 1mA REFERENCE CURRENT TC BY ±40ppm/°C. THIS TRIM SCHEME HAS VERY LITTLE EFFECT ON ROOM TEMPERATURE CURRENT TO MINIMIZE ITERATIVE TRIMMING * DAC Precision DAC Reference with System TC Trim 2-Pole Lowpass Filtered Reference Strain Gauge Conditioner for 350 Ω Bridge LT1236-10 OUT IN GND LT1236 TA08 – + LM301A † 100pF 8 1 6 6 3 2 –5V 357 Ω 1/2W –15V R5 2M R6* 2M LT1012C 2 3 R4 20k R2 20k 5V R3 2M VOUT X100 350 Ω STRAIN GAUGE BRIDGE** 28mA 28.5mA R1 357 Ω 1/2W 15V THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO THE BRIDGE TO ELIMINATE LOADING EFFECT OF THE AMPLIFIER. EFFECTIVE ZIN OF AMPLIFIER STAGE IS ≥ 1MΩ. IF R2 TO R5 ARE CHANGED, SET R6 = R3 * BRIDGE IS ULTRA-LINEAR WHEN ALL LEGS ARE ACTIVE, TWO IN COMPRESSION AND TWO IN TENSION, OR WHEN ONE SIDE IS ACTIVE WITH ONE COMPRESSED AND ONE TENSIONED LEG OFFSET AND DRIFT OF LM301A ARE VIRTUALLY ELIMINATED BY DIFFERENTIAL CONNECTION OF LT1012C ** † LT1236-10 OUT GND LT1236 TA13 2.5mA –10V (ILOAD ≤ 1mA) –11V TO – 40V 27 Ω LM334 Negative Shunt Reference Driven by Current Source LT1236 OUT IN GND LT1236 TA12 – + 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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