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LT1031 数据表(PDF) 9 Page - Linear Technology |
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LT1031 数据表(HTML) 9 Page - Linear Technology |
9 / 12 page 9 LT1031/LH0070 1031fb Strain Gauge Conditioner for 350 Ω Bridge Ultralinear Platinum Temperature Sensor* APPLICATIO CIRCUITS – + LT1031 GND OUT IN 20V 20V –15V –15V 2 3 7 4 6 VOUT = 100mV/°C –50 °C ≤ T ≤ 150°C R2* 5k R14 5k R12 1k R15 10k R13 24.3k R10 182k 1% R11 6.65M 1% R5 200k 1% R6 619k 1% R4 4.75k 1% R7 392k 1% RS † 100 Ω AT 0 °C R1** 253k R8 10M R9 100k R3** 5k Rf** 654k STANDARD INDUSTRIAL 100 Ω PLATINUM 4-WIRE SENSOR, ROSEMOUNT 78S, OR EQUIVALENT. α = 0.00385 TRIM R9 FOR VOUT = 0 AT 0°C TRIM R12 FOR VOUT = 10V AT 100°C TRIM R14 FOR VOUT = 5V AT 50°C USE TRIM SEQUENCE AS SHOWN. TRIMS ARE NON-INTERACTIVE SO THAT ONLY ONE TRIM SEQUENCE IS NORMALLY REQUIRED. FEEDBACK LINEARIZES OUTPUT TO ±0.005°C FROM – 50°C TO 150°C WIREWOUND RESISTORS WITH LOW TC † * ** LT1031 • AC06 LT1001 R2 20k R4 20k R1 357 Ω 1/2W 357 Ω 1/2W R6 2M Ω* R3 2M Ω R5 2M 350 Ω STRAIN GUAGE BRIDGE** LT1031 • AC05 5V –5V 100pF VOUT • 100 6 6 8 1 3 3 2 2 28mA 28.5mA 15V –15V LT1031 LT1012C LM301A † GND IN OUT – + THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO THE BRIDGE TO ELIMINATE LOADING EFFECT OF THE AMPLIFIER. EFFECTIVE ZIN OF AMPLIFIER STAGE IS ≥ 1MΩ. IF R2–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 DIFERENTIAL CONNECTION OF LT1012C * ** † |
类似零件编号 - LT1031 |
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类似说明 - LT1031 |
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