TMP03 Analog Devices, TMP03 Datasheet
TMP03
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TMP03 Summary of contents
Page 1
... TMP04 is CMOS/TTL compatible, and is easily interfaced to the serial inputs of most popular micro- processors. The open-collector output of the TMP03 is capable of sinking 5 mA. The TMP03 is best suited for systems requiring isolated circuits utilizing optocouplers or isolation transformers. The TMP03 and TMP04 are specified for operation at supply voltages from 4 ...
Page 2
... TMP03/TMP04–SPECIFICATIONS TMP03F ( – 100 C unless otherwise noted) A Parameter ACCURACY Temperature Error Temperature Linearity Long-Term Stability Nominal Mark-Space Ratio Nominal T1 Pulse Width Power Supply Rejection Ratio OUTPUTS Output Low Voltage Output Low Voltage Output Low Voltage Digital Output Capacitance ...
Page 3
... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the TMP03/TMP04 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
Page 4
... Since both periods are obtained consecutively, using the same clock, performing the division indicated in the above formulas results in a ratiometric value that is independent of the exact frequency of, or drift in, either the originating clock of the TMP03/TMP04 or the user’s counting clock. –4– Figure 2 ...
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... DISS Calibration The TMP03 and TMP04 are laser-trimmed for accuracy and linearity during manufacture and, in most cases, no further adjustments are required. However, some improvement in performance can be gained by additional system calibration. To perform a single-point calibration at room temperature, measure the TMP03/TMP04 output, record the actual measurement temperature, and modify the offset constant (normally 235 ...
Page 6
... Figure 7. TMP03 Output Rise Time at + +Width s Wfm does not cross ref Ch 1 –Width s Wfm does not cross ref Ch 1 Rise s No valid edge Ch 1 Fall 209.6ns Figure 8. TMP03 Output Rise Time at +125 C –6– + 10k LOAD 4.5 5 5.5 6 6.5 7 SUPPLY VOLTAGE – Volts ...
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... T = +125 C cross ref + Rise No valid C = 100pF LOAD LOAD Ch 1 Fall 139.5ns TIME SCALE = 250ns/DIV Figure 9. TMP03 Output Fall Time at +125 C Running: Sample 200MS + + 100pF LOAD LOAD TIME SCALE = 250ns/DIV Figure 10. TMP04 Output Fall Time at +25 C ...
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... T2 800 600 400 200 100 Figure 19. Supply Current vs. Supply Voltage 3.5 2.5 TMP03 1.5 0.5 125 175 Figure 20. Power Supply Rejection vs. Temperature –8– 5 START-UP VOLTAGE DEFINED AS OUTPUT READING BEING WITHIN OUTPUT AT +4.5V SUPPLY R = 10k LOAD 4 3 –75 – 125 TEMPERATURE – ...
Page 9
... I = 1mA LOAD 0.5mA LOAD 0 –75 – TEMPERATURE – *C Figure 22. TMP03 Open-Collector Output Voltage vs. Temperature 140 TRANSITION FROM +100 C OIL BATH TO FORCED +25 C AIR 120 V+ = +5V 100 R = 10k LOAD 80 60 TO-92 – WITH SOCKET 40 TO-92 – NO SOCKET SOIC – NO SOCKET ...
Page 10
... The TMP03’s open-collector output is ideal for driving logic gates that operate from low supply voltages, such as 3 shown in Figure 30, a pull-up resistor is connected from the low voltage logic supply (2 etc.) to the TMP03 output. +5V Current through the pull-up resistor should be limited to about ...
Page 11
... Output Encoding section of this data sheet (page 4). Since the TMP03/TMP04’s output is ratiometric, precise control of the counting frequency is not required. The only timing requirements are that the clock ...
Page 12
... TMP03/TMP04 Software for the interface is shown in Listing 1. The program monitors the TMP04 output, and turns the counters on and off to measure the duty cycle. The time that the output is high is measured by Timer 0, and the time that the output is low Test of a TMP04 interface to the 8051, ...
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... In a typical ASIC application, of course, one set of latches could be eliminated if the latch contents, and the output polarity, were read before the next phase reversal of the TMP04. –13– TMP03/TMP04 . H to obtain the H ...
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... TMP03/TMP04 Listing 2. Software Routine for the TMP04-to-ADSP-210x Interface ; { ADSP-21XX Temperature Measurement Routine Altered Registers: Return value: Computation time: } .MODULE/RAM/BOOT=0 TEMPERAT; .ENTRY TEMPMEAS; .CONST PRESCALER=4; .CONST TIMFULSCALE=0Xffff; TEMPMEAS: si=PRESCALER; sr0=TIMFULSCALE; dm(0x3FFB)=si; si=TIMFULSCALE; dm(0x3FFC)=si; dm(0x3FFD)=si; imask=0x01; TEST1: if not fi jump TEST1; TEST0 jump TEST0; ...
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... The TMP03 and TMP04 measure and convert the temperature at the surface of their own semiconductor chip. When the TMP03/TMP04 are used to measure the temperature of a nearby heat source, the thermal impedance between the heat source and the TMP03/TMP04 must be considered. Often, a thermocouple or other temperature sensor is used to measure REV ...
Page 16
... It is commonly specified in units of degrees per watt of power transferred across the thermal joint. Thus, the time required for PGA SOCKET the TMP03/TMP04 to settle to the desired accuracy is dependent on the package selected, the thermal contact PC BOARD established in that particular application, and the equivalent power of the heat source ...