SM72480

Manufacturer Part NumberSM72480
ManufacturerTexas Instruments
SM72480 datasheet
 


Specifications of SM72480

Pin/package6SON, 6USON, 6WSON  
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SM72480
SM72480 SolarMagic 1.6V, LLP-6 Factory Preset Temperature Switch and
Temperature Sensor
Literature Number: SNIS156B

SM72480 Summary of contents

  • Page 1

    ... SM72480 SM72480 SolarMagic 1.6V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor Literature Number: SNIS156B ...

  • Page 2

    ... V could be used to verify the temperature trip point. The SM72480's low minimum supply voltage makes it ideal for 1.8 volt system designs. Its wide operating range, low supply current , and excellent accuracy provide a temperature switch solution for a wide range of commercial and industrial applications ...

  • Page 3

    Block Diagram Pin Descriptions Pin Name Type No. TRIP Digital 1 TEST Input Digital 5 OVERTEMP Output Digital 3 OVERTEMP Output www.national.com Equivalent Circuit TRIP TEST pin. Active High input. If TRIP TEST = 0 (Default) then ...

  • Page 4

    Pin Name Type Equivalent Circuit No. Analog V 6 TEMP Output 4 V Power DD 2 GND Ground DAP Die Attach Pad Typical Application Description V Analog Voltage Output TEMP If TRIP TEST = 0 then ...

  • Page 5

    ... Order Number Trip Point, °C SM72480SD-125 125°C SM72480SDE-125 125°C SM72480SDX-125 125°C SM72480SD-120 120°C SM72480SDE-120 120°C SM72480SDX-120 120°C SM72480SD-105 105°C SM72480SDE-105 105°C SM72480SDX-105 105°C www.national.com NS Package Description Number 6–pin LLP SDB06A 6–pin LLP SDB06A 6– ...

  • Page 6

    ... Trip Point Accuracy Parameter Trip Point Accuracy (Note 7) V Analog Temperature Sensor Output Accuracy TEMP The limits do not include DC load regulation. The stated accuracy limits are with reference to the values in the SM72480 Conversion Table. Parameter V Temperature TEMP Trip Point Accuracy 125°C or 120°C ...

  • Page 7

    Electrical Characteristics Unless otherwise noted, these specifications apply for + all other limits 25°C. MAX A J Symbol Parameter GENERAL SPECIFICATIONS I Quiescent Power Supply S Current Hysteresis OVERTEMP DIGITAL OUTPUT V Logic "1" ...

  • Page 8

    ... Note 8: Changes in output due to self heating can be computed by multiplying the internal dissipation by the temperature resistance. Note 9: Source currents are flowing out of the SM72480. Sink currents are flowing into the SM72480. Note 10: The 1 µA limit is based on a testing limitation and does not reflect the actual performance of the part. Expect to see a doubling of the current for every 15° ...

  • Page 9

    Typical Performance Characteristics V Output Temperature Error vs. Temperature TEMP Supply Current vs. Temperature V Supply-Noise Rejection vs. Frequency TEMP www.national.com Minimum Operating Temperature vs. Supply Voltage 30142007 Supply Current vs. Supply Voltage 30142004 Line Regulation V TEMP 30142043 8 ...

  • Page 10

    ... SM72480 V vs Die TEMP Temperature Conversion Table The SM72480 has a factory-set gain, which is dependent on the Temperature Trip Point. The V TEMP voltage, in millivolts, at each discrete die temperature over the complete operating range is shown in the conversion table below. V Temperature Sensor Output Voltage vs Die ...

  • Page 11

    V , Analog Output Voltage, mV TEMP Die Temp °C TRIP 125 or 120°C 35 1763 36 1753 37 1743 38 1732 39 1722 40 1712 41 1701 42 1691 43 1681 44 1670 45 1660 46 1650 ...

  • Page 12

    ... V vs DIE TEMPERATURE APPROXIMATIONS TEMP The SM72480's V analog temperature output is very lin- TEMP ear. The Conversion Table above and the equation in Section 1.1.1 represent the most accurate typical performance of the V voltage output vs Temperature. TEMP 1.1.1 The Second-Order Equation (Parabolic) The data from the Conversion Table, or the equation below, when plotted, has an umbrella-shaped parabolic curve ...

  • Page 13

    ... In these applications the source current is required to quickly charge the input capacitor of the ADC. See the Applications Circuits section for more discus- sion of this topic. The SM72480 is ideal for this and other applications which require strong source or sink current. 4.1 NOISE CONSIDERATIONS ...

  • Page 14

    ... Alternatively, the SM72480 can be mounted inside a sealed- end metal tube, and can then be dipped into a bath or screwed into a threaded hole in a tank. As with any IC, the SM72480 and accompanying wiring and circuits must be kept insulated and dry, to avoid leakage and corrosion. This is especially true if the circuit may operate at cold temperatures where con- densation can occur ...

  • Page 15

    ... Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges the sampling cap, it requires instantaneous charge from the output of the analog source such as the SM72480 temperature sensor and many op amps. This requirement is easily accommodated by the addition of a capacitor (C on the size of the sampling capacitor and the sampling frequency ...

  • Page 16

    FIGURE 8. TRIP TEST Digital Output Test Circuit The TRIP TEST pin, normally used to check the operation of the OVERTEMP and OVERTEMP pins, may be used to latch the outputs whenever the temperature exceeds the programmed limit and causes ...

  • Page 17

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 6-Lead LLP-6 Package NS Package Number SDB06A 16 ...

  • Page 18

    Notes 17 www.national.com ...

  • Page 19

    For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs ...

  • Page 20

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...