NCT47 High Precision Temperatureto-Voltage Converter The NCT47 is linear output temperature sensor whose output voltage is directly proportional to measured temperature. The NCT47 can accurately measure temperature from –40°C to +125°C. For the NCT47, the output voltage range is typically 100mV at –40°C, 500mV at 0°C, 750mV at +25°C, and 1.75V at +125°C. A 10mV/°C voltage slope allows for the wide temperature range. The NCT47 is packaged in space saving 3–Pin SOT–23B packages, making them ideal for space critical applications. http://onsemi.com Features Wide Temperature Measurement Range: –40°C to 125°C High Temperature Converter Accuracy: ±2°C Max at 25°C Linear Temperature Slope: 10mV/°C 2.7V to 4.4V Operating Range Small 3–Pin SOT–23B Package Very Low Supply Current: 35µA typical SOT–23B (TO–236) CASE TBD • • • • • • PIN CONFIGURATION (Top View) VDD Typical Applications • Cellular Phones • Power Supply Thermal Shutdown • Temperature–Controlled Fans • Temperature Measurement / Instrumentation • Temperature Regulators • Consumer Electronic • Portable Battery Powered Equipment 1 3 VOUT VSS 2 SOT–23B* NOTE: *SOT–23B is equivalent to JEDEC (TO–236) FUNCTIONAL BLOCK DIAGRAM VDD = 2.7V to 4.4V ORDERING INFORMATION MICROCONTROLLER VDD NCT47 Device NCT47SNT1 Package Shipping SOT–23B 3000 Tape/Reel A/D CONVERTER VOUT VSS Semiconductor Components Industries, LLC, 2000 May, 2000 – Rev. 0 1 Publication Order Number: NCT47/D NCT47 ABSOLUTE MAXIMUM RATINGS* Symbol Parameter Value Unit +7.0 V (VSS – 0.3) to (VDD + 0.3) V Operating Temperature Range –40 to +125 °C Tstg Storage Temperature Range –55 to +150 °C Tsol Lead Temperature (Soldering, 10 Seconds) +260 °C VDD Supply Voltage VSS Voltage on Any Pin with Respect to Supplies TA * Maximum Ratings are those values beyond which damage to the device may occur. ELECTRICAL CHARACTERISTICS (TA = –40°C to +125°C, VDD = 2.7V to 4.4V, unless otherwise noted.) Min Typ Max Unit VDD Symbol Supply Voltage Characteristic 2.7 — 4.4 V IQ Supply Current, Operating — 35 60 µA AV Average Slope of Output Voltage — 10 — mV/°C TMPACY25 Temperature Accuracy at 25°C TA = 25°C –2.0 ±0.5 +2.0 °C TMPACY125 Temperature Accuracy TA = 125°C –3.0 — +3.0 °C TMPACY–40 Temperature Accuracy TA = –40°C — 1.5 — °C VOUT–40 Output Voltage at –40°C — 100 — mV VOUT+25 Output Voltage at 25°C 730 750 770 mV VOUT+125 Output Voltage at 125°C 1720 1750 1780 mV IOUT Output Source and Sink Current 100 — — µA PIN DESCRIPTION ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Pin No. Symbol 1 VDD 2 VOUT 3 VSS Description Input Supply Voltage Temperature Sensor Output Terminal Ground Terminal DETAILED DESCRIPTION The NCT47 has an output voltage that varies linearly with temperature in degrees Celsius. Figure 1 shows a plot of the output voltage versus temperature for the NCT47. The temperature slope is fixed at 10 mV/°C, and the output voltage at 0°C is 500 mV. VOUT = (10 mV/°C) (Temperature °C) + 500 mV 1.75 Vout(Volts) 1.7 1.5 1.3 1.1 0.9 0.7 0.5 0.3 0.1 –40 –30 –20–10 0 10 20 30 40 50 60 70 80 90 100110120 Temperature (°C) Figure 1. Output Voltage vs. Temperature http://onsemi.com 2 125 NCT47 TYPICAL CHARACTERISTICS 4 60 3 ° 50 Vdd = 2.7V SUPPLY CURRENT ( mA) TEMP ACC. ( C) 2 1 0 –1 Vdd = 4.4V –2 Vdd = 4.4V 40 30 Vdd = 2.7V 20 10 –3 –4 –50 –40–30 –20–10 0 10 20 30 40 50 60 70 80 90 100110 120130140 0 –40 –25 –10 TEMPERATURE (C°) 5 20 35 50 65 Figure 3. Supply Current vs Temperature TAPING FORM Component Taping Orientation for 3–Pin SOT–23B (JEDEC TO–236) Devices USER DIRECTION OF FEED DEVICE MARKING W = Width of Carrier Tape PIN 1 P = Pitch Standard Reel Component Orientation (Mark Right Side Up) Tape & Reel Specifications Table SOT–23B 95 TEMPERATURE (C°) Figure 2. Temperature Accuracy vs Temperature Package 80 Carrier Width (W) 8 mm Pitch (P) Part Per Full Reel Reel Size 4 mm 3000 7 inches MARKING DIAGRAM SOT–23B x x Y W xx = part number code & temperature range YW = Date Code http://onsemi.com 3 110 125 NCT47 PACKAGE DIMENSIONS 3–Pin SOT–23B (JEDEC TO–236) 0.021 (0.54) 0.015 (0.37) 0.103 (2.64) 0.083 (2.10) 0.055 (1.40) 0.047 (1.20) 0.040 (0.60) 0.017 (0.44) 0.120 (3.05) 0.105 (2.67) 0.040 (1.02) 0.031 (0.79) 0.004 (0.10) 0.001 (0.02) 0.007 (0.18) 0.003 (0.085) 8 ° MAX. 0.080 (2.05) 0.070 (1.78) 0.010 (0.25) 0.005 (0.13) ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. 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