ADT14GP AD [Analog Devices], ADT14GP Datasheet
ADT14GP
Related parts for ADT14GP
ADT14GP Summary of contents
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FEATURES Four Programmable Temperature Setpoints Programmable Thermal Hysteresis Accuracy 3 C Typ from – +125 C Temperature Output Scale Factor = 5 mV/K Resistor Programmable Temperature Setpoints 5 mA Open-Collector Setpoint Outputs Internal 2.5 V Reference 600 ...
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... OL SINK See Figure Unloaded Unloaded at + Model/Grade ADT14GP ADT14GS NOTES 1 XIND = Plastic DIP Small Outline. THERMAL PACKAGE CHARACTERISTICS Package Type 16-Lead Plastic DIP 16-Lead SOIC –2– Min Typ Max Units ...
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WAFER TEST LIMITS ( GND = Parameter INPUTS SET HIGH, SET LOW Input Bias Current OUTPUT VPTAT Temperature Accuracy OUTPUT V REF Nominal Value Line Regulation Load Regulation OPEN-COLLECTOR OUTPUTS OVER, UNDER Output Low ...
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ADT14 –Typical Performance Characteristics 160 TRANSITION FROM +100 C STIRRED OIL BATH TO FORCED +25 C AIR 140 V+ = +5V, NO LOAD 120 100 80 SOIC SOLDERED TO 0.6" 60 PDIP IN SOLDERTAIL SOCKET SOLDERED TO 0.8" ...
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V+ = +5V, NO LOAD 400 375 350 325 300 TEMPERATURE – C Figure 8. Supply Current vs. Temperature +1V + ...
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ADT14 APPLICATIONS INFORMATION Programming the ADT14 To program any of the four temperature trip points, simply set the voltage at the setpoint pin equal to the voltage expected at the VPTAT output at the desired trip temperature. The on- board ...
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The comparator output remains on until the voltage at the compara- tor input, now equal to VPTAT plus the hysteresis offset, has returned to the setpoint voltage. At this point ...
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ADT14 Safety Considerations In heating and cooling system design, designers should antici- pate potential system fault conditions which may result in sig- nificant safety hazards which are outside the control of, and cannot be corrected by, the ADT14 based circuit. ...
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ADT14 3 TEMP NC 14 SENSOR & VOLTAGE REFERENCE 5 12 HYSTERESIS 6 11 GENERATOR IN4001 OR EQUIVALENT CONNECT Figure 18a. Reed Relay Drive 1 2 ...
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ADT14 High Current Switching As mentioned earlier, internal dissipation due to large loads on the ADT14 outputs will cause some temperature error due to self-heating. External transistors buffer the load from the ADT14, so that virtually no power is dissipated ...
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Buffering the Temperature Output Pin The VPTAT sensor output is a low impedance dc output volt- age with a 5 mV/K temperature coefficient, and is useful in a number of measurement and control applications. In many applications, this voltage may ...
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ADT14 By connecting the VPTAT output to the input of the AD654, the 5 mV/K, temperature coefficient gives a sensitivity of 25 Hz/ C, centered around 7.5 kHz The trimming resistor, R2, is needed to calibrate the ...
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Out-of-Range Warning In Figure 25, connecting an open-collector output of the ADT14 and an inverted open-collector output together into a wired-OR configuration, a temperature “out-of-range” warning signal is generated. This can be useful in sensitive equipment calibrated to work over ...
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ADT14 P0.0 TO USER P3.2 P0.7 INPUTS P3.1 P3.0 P3.3 TO 2ND AD8403 80CL51 C P2.0 P2.1 P2.2 P2.3 P1.0/INT2 P2.4 + OUT DIS 0.1 F TLC555 THR CONT TRIG 0.1 F GND Figure 28. Typical Microcontroller ...
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Figure 30 illustrates the system described in the previous para- graph, where each trip-point output corresponds to a 25% re- duction in power when tripped. This is accomplished by the dual rail-to-rail precision OP284 op amp configured as an in- ...
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ADT14 0.210 (5.33) 0.160 (4.06) 0.115 (2.93) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Plastic DIP (N-16) 0.840 (21.34) 0.745 (18.92 0.280 (7.11) 0.240 (6.10 PIN 1 0.060 (1.52) 0.015 (0.38) MAX 0.130 (3.30) ...