-40-+125℃ digital thermometer circuit diagram

Published:2011/3/30 20:42:00 Author:Ecco | Keyword: digital thermometer | From:SeekIC

This digital thermometer electrocircuit is composed of SL616, a newsemiconductor IC temperature-sensitive sensor and three half digital voltage panel(DVP)s, and it uses the SL616 A to measure the temperature in the ranges of -40~125 ℃. And it uses the SL161 C to measure the temperature in the ranges of -25~85 ℃, measurement accuracy after correcting is ±0.5 ℃. Its power supply use 3 sets of +6 V, ±the 10, and only +6 V power supply consume higher current(about the 65 mas), each ±10 V power supply the only consume about 3 mA current. The digital thermometer creates corresponds thermal voltage semaphore(-10 mVs/K), then the semaphor is become ratio's voltage semaphore(+10 mVs/℃) at Celsius temperature after making the null point displacement by operational amplifier, and sent to DVP to carry on digitize display as thermal amount of indication.



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