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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 -40C to +125C. For the NCT47, the output voltage range is typically 100mV at -40C, 500mV at 0C, 750mV at +25C, and 1.75V at +125C. 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.
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* * * * * * * * * * * * *
Features Wide Temperature Measurement Range: -40C to 125C High Temperature Converter Accuracy: 2C Max at 25C Linear Temperature Slope: 10mV/C 2.7V to 4.4V Operating Range Small 3-Pin SOT-23B Package Very Low Supply Current: 35A typical
SOT-23B (TO-236) CASE TBD
PIN CONFIGURATION (Top View)
VDD 1 VSS
Typical Applications Cellular Phones Power Supply Thermal Shutdown Temperature-Controlled Fans Temperature Measurement / Instrumentation Temperature Regulators Consumer Electronic Portable Battery Powered Equipment
FUNCTIONAL BLOCK DIAGRAM
VDD = 2.7V to 4.4V MICROCONTROLLER VDD NCT47 VOUT
3 VOUT 2
SOT-23B*
NOTE: *SOT-23B is equivalent to JEDEC (TO-236)
ORDERING INFORMATION
Device NCT47SNT1 Package SOT-23B Shipping 3000 Tape/Reel
A/D CONVERTER
VSS
(c) Semiconductor Components Industries, LLC, 2002
1
June, 2002 - Rev. 2
Publication Order Number: NCT47/D
NCT47
MAXIMUM RATINGS*
Symbol VDD VSS TA Tstg Tsol Supply Voltage Voltage on Any Pin with Respect to Supplies Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Seconds) Parameter Value +7.0 (VSS - 0.3) to (VDD + 0.3) -40 to +125 -55 to +150 +260 Unit V V C C C
* Maximum Ratings are those values beyond which damage to the device may occur.
ELECTRICAL CHARACTERISTICS (TA = -40C to +125C, VDD = 2.7V to 4.4V, unless otherwise noted.)
Symbol VDD IQ AV TMPACY25 TMPACY125 TMPACY-40 VOUT-40 VOUT+25 VOUT+125 IOUT Supply Voltage Supply Current, Operating Average Slope of Output Voltage Temperature Accuracy at 25C Temperature Accuracy Temperature Accuracy Output Voltage at -40C Output Voltage at 25C Output Voltage at 125C Output Source and Sink Current TA = 25C TA = 125C TA = -40C Characteristic Min 2.7 -- -- -2.0 -3.0 -- -- 730 1720 100 Typ -- 35 10 0.5 -- 1.5 100 750 1750 -- Max 4.4 60 -- +2.0 +3.0 -- -- 770 1780 -- Unit V A mV/C C C C mV mV mV A
PIN DESCRIPTION
Pin No. 1 2 3 Symbol VDD Input Supply Voltage Temperature Sensor Output Terminal Ground Terminal Description
Vout(Volts)
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VOUT VSS 1.75 1.7 1.5 1.3 1.1 0.9 0.7 0.5 0.3 0.1
DETAILED DESCRIPTION temperature slope is fixed at 10 mV/C, and the output voltage at 0C is 500 mV.
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
VOUT = (10 mV/C) (Temperature C) + 500 mV
-40 -30 -20-10 0 10 20 30 40 50 60 70 80 90 100110120 Temperature (C)
125
Figure 1. Output Voltage vs. Temperature
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NCT47
TYPICAL CHARACTERISTICS
4 3 SUPPLY CURRENT ( mA) 2 TEMP ACC. ( C) 1 0 -1 -2 -3 -4 -50 -40-30 -20-10 0 10 20 30 40 50 60 70 80 90 100110 120130140 TEMPERATURE (C) Vdd = 4.4V Vdd = 2.7V 60 50 40 30 20 10 0 -40 Vdd = 2.7V Vdd = 4.4V
-25 -10
5
20
35
50
65
80
95
110 125
TEMPERATURE (C)
Figure 2. Temperature Accuracy vs Temperature
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 Package SOT-23B Carrier Width (W) 8 mm Pitch (P) 4 mm Part Per Full Reel 3000 Reel Size 7 inches
MARKING DIAGRAM
SOT-23B
x
x
Y
W
xx = part number code & temperature range YW = Date Code
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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)
8 MAX. 0.080 (2.05) 0.070 (1.78)
0.007 (0.18) 0.003 (0.085) 0.010 (0.25) 0.005 (0.13)
0.004 (0.10) 0.001 (0.02)
ON Semiconductor and are registered 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.
PUBLICATION ORDERING INFORMATION
Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative.
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NCT47/D

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