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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMP300BIDBVT датащи(PDF) 7 Page - Texas Instruments |
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TMP300BIDBVT датащи(HTML) 7 Page - Texas Instruments |
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7 / 18 page  210kW T SET OUT V+ HYST SET V TEMP TMP300 3 A m Proportional toT A AnalogOut OPA335 - 50 - 25 0 1.00 0.75 0.50 0.25 0 - 0.25 - 0.50 - 0.75 - 1.00 25 50 75 100 125 Temperature( C) ° 210kW T SET OUT V+ HYST SET V TEMP TMP300 3 A m Proportional toT A Open-DrainControl Voltagesource totesttrippoint. DAC8560 TMP300 www.ti.com SBOS335C – JUNE 2005 – REVISED JANUARY 2011 ANALOG TEMPERATURE OUTPUT USING A DAC TO SET THE TRIP POINT The analog out or VTEMP pin is high-impedance The trip point is easily converted by changing the (210k Ω). Avoid loading this pin to prevent degrading digital-to-analog converter (DAC) code. This the analog out value or trip point. Buffer the output of technique can be useful for control loops where a this pin when using it for direct thermal measurement. large thermal mass is being brought up to the set Figure 9 shows buffering of the analog output signal. temperature and the OUT pin is used to control the heating element. The analog output can be monitored in a control algorithm that adjusts the set temperature to prevent overshoot. Trip set voltage error versus temperature is shown in Figure 10, which shows error in °C of the comparator input over temperature. An alternative method of setting the trip point by using a DAC is shown in Figure 11. Figure 9. Buffering the Analog Output Signal Figure 10. Trip Set Voltage Error vs Temperature Figure 11. DAC Generates the Voltage-Driving TSET Pin Copyright © 2005–2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): TMP300 |
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