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PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02 TC02 TC03 TC03 PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS
FEATURES
s s s s s s Linearized Temperature-to-Voltage Converters Direct Centigrade Output Voltage Scaling (TC03) Wide Temperature Measurement Range (TC02) ............................... - 20C to +125C Excellent Temperature Converter Linearity .. 0.8C Over Temperature High Temperature Converter Accuracy .......... 2C at 25C Guaranteed Small Packages ................ TO-92-3 and SOT-23B-3
GENERAL DESCRIPTION
The TC02/03 temperature sensors furnish a linearized output voltage directly proportional to measured temperature. The TC03 has a temperature measurement range of - 20C to +100C. Its output voltage is directly calibrated in degrees Centigrade (i.e. VOUT = 10mV/C x Temperature C). An external pull-down resistor to a negative voltage source is required for temperature measurement below 0C. The TC02 has a temperature measurement range of - 20C to +125C, and operates with a single supply. It has the same output voltage slope with temperature as the TC03 (10mV/C). The output voltage range is 300mV at - 20C to 1,750mV at +125C. Small size, low cost and low power operation make the TC02/03 suitable for a wide range of general purpose temperature measurement applications.
APPLICATIONS
s s s s s Power Supply Thermal Shut-Down Temperature-Controlled Fans Temperature Measurement/Instrumentation Temperature Regulators Consumer Electronics
ORDERING INFORMATION
Output Voltage At 25C 750mV 750mV 250mV 250mV
Part No. TC02VNB TC02VZB TC03VNB TC03VZB
Package *SOT-23B-3 TO-92 *SOT-23B-3 TO-92
Temp. Range - 20C to +125C - 20C to +125C - 20C to +100C - 20C to +100C
FUNCTIONAL BLOCK DIAGRAM
NOTE: *SOT-23B-3 is equivalent to JEDEC (TO-236)
VCC = 2.2V to 12V MICROCONTROLLER
. PIN CONFIGURATION
*SOT-23B-3 (Top View)
GND 3
TO-92-3
123
VCC VOUT TC03 GND
A/D CONVERTER
TC02VZB TC03VZB TC02VNB TC03VNB 1 VCC 2
VOUT
VOUT
NOTE: *SOT-23B-3 is equivalent to JEDEC (TO-236)
TC02/03-04 6/18/97
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices. 1
GND
VCC
PRELIMINARY INFORMATION
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
TC02 TC03
ABSOLUTE MAXIMUM RATINGS *
Supply Voltage ............................................................15V Input Voltage, Any Terminal .............. - 1.0 to (VCC +0.3V) Operating Temperature (TC02) ............. - 20C to +125C Operating Temperature (TC03) ............. - 20C to +100C Storage Temperature ............................ - 55C to +150C Lead Temperature (Soldering, 10 sec) SOT-23B-3 ..................................................... +260C TO-92-3 .......................................................... +300C
* Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS : TA = - 20C to +125C, VCC = 5V 5%, unless otherwise specified.
Symbol VCC VCC IS ISRC Parameter Supply Voltage (TC02) Supply Voltage (TC03) Supply Current VOUT Output Source Current Accuracy at Room Temperature Accuracy at Minimum Temperature Test Conditions Min 3.0 2.2 -- -- -2 -7 -7 -3 -3 - 0.8 -- -- -- Typ -- -- 40 -- 0.5 0.5 0.5 -- -- -- 80 10 -- Max 12 12 60 1.0 +2 +5 +5 +3 +3 +0.8 -- -- VCC - 1.2 Unit V V A mA C C C C V/V mV/C V
Note 1 TA = 25C (Note 2) TC02: TA = - 20C TC03: TA = - 20C (Note 2) TC02: TA = +125C TC03: TA = +100C Note 3, 4
Accuracy at Maximum Temperature (Note 2) Nonlinearity Line Regulation Average Slope of Output Voltage Maximum Output Voltage
AV VOUTMAX
TC02: 3.0V VCC 12V TC03: 2.2V VCC 12V (Note 1)
Notes: 1. VOUT outputs open circuited. 2. Accuracy = Difference between calculated output voltage (10mV/C x Device case temperature at specified temperature and power supply) and measured output voltage expressed in C. 3. Nonlinearity = deviation of output voltage versus temperature from the best-fit straight line over the device rated temperature range. 4. Guaranteed by design.
DETAILED DESCRIPTION
A plot of output voltage versus temperature for both the TC02 and TC03 appears in Figure 1. The TC03 can be used with single power supply to measure temperatures from 0C to 100C. A pull-down resistor (R1 in Figure 2) must be added from VOUT to the negative power supply for measuring temperatures less than 0C. The value of the resistor must be chosen to limit the maximum current pulled from the output to the negative supply to - 50A (i.e. R1 = VSS/50A).
OUTPUT STAGE
Both the TC02 and TC03 have Class A output stages capable of sourcing 1mA. These devices have a limited ability to drive heavy capacitive loads. Loads of 50pF (to ground) can be driven directly. For heavier loads, a 2k (or greater) resistor should be placed in series with the output for decoupling. If the TC02/03 is used in a noisy electrical environment, a 0.1F bypass capacitor from VCC to GND is recommended.
TC02/03-04 6/18/97
2
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02 TC03
1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 VOUT (VOLTS) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 - 0.1 - 0.2 - 40 - 30 - 20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 TC03 TC02 TC02: VOUT = (10mV/C) (Temperature C) + 500mV TC03: VOUT = (10mV/C) (Temperature C)
TEMPERATURE (C)
Figure 1. Output Voltage vs Temperature
VCC = 2.2V to 12.0V MIN.
VCC = 3.0V to 12.0V
VCC VOUT R1 R1 = VSS/50A VSS TC03 (- 20C to +100C) VOUT
VCC VOUT TC02 GND VOUT
TC03 GND
TC02 (- 20C to +125C)
Figure 2. TC02/03 Power Supply Connections for Full Scale Measurements
TC02/03-04
6/18/97
3
PRELIMINARY INFORMATION
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
TC02 TC03
TYPICAL CHARACTERISTICS
Supply Current vs. Temperature
100
VCC= +5V
Thermal Time Constant (Sec) vs. Air Velocity
60 50
THERMAL TIME (SEC)
SUPPLY CURRENT (A)
80 60 40
40 30 20 10 0
20 10 -50
-25
0
25
50
75
100 125
0
200
400
600
800
1000
TEMPERATURE (C)
AIR VELOCITY (FPM)
Thermal Response in Still Air vs.Time
PERCENT OF FINAL VALUE (%)
VOUT (From Power Initially Applied) vs. Time (Turn-on Response)
125 100 2V/DIV 75 0V 50 500mV/DIV 0V 0 0 20 40 60 80 100 20sec/DIV TIME (SEC.)
25
TC02/03-04 6/18/97
4
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02 TC03
MARKING SOT-23B-3 TO-92-3
12345 6 7 8 9 10 11 12 13 14 15
&
= part number code and temperature range TC02VNB = AA - 20C to 125C TC03VNB = AB - 20C to 100C
AA ex: 02 = kkkk AB ex: 03 = kkkk
& , , , &
= TC (fixed) = blank & = part number
= year and quarter = lot ID
= temperature range C = - 20C to +125C D = - 20C to +100C , , , & = traceability code
TAPING FORMS SOT-23B-3
PIN 1
User Direction of Feed
Device Marking Device Marking
User Direction of Feed
PIN 1 Standard Reel Component Orientation for 713 or TR Suffix Device (Mark Right Side Up)
P Reverse Reel Component Orientation for 723 or RT Suffix Device (Mark Upside Down)
Tape & Reel Specifications Table Package 3L SOT-23B Carrier Width (W) 8 mm Pitch (P) 4 mm Part Per Full Reel 3000 Reel Size 7
TC02/03-04
6/18/97
5
W
PRELIMINARY INFORMATION
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
TC02 TC03
TAPING FORMS (Cont.) Component Taping Orientation for TO-92
User Direction of Feed
P
Mark Face
MARK FACE MARK FACE MARK FACE
Seal Tape Back Tape
W
User Direction of Feed
P
Mark Face
MARK FACE MARK FACE MARK FACE
Seal Tape Back Tape
W
Standard Reel Component Orientation for 713 or TR Suffix Device
Reverse Reel Component Orientation for 723 or RT Suffix Device
Tape & Reel Specifications Table Package TO-92-3
TC02/03-04 6/18/97
Carrier Width (W) 18 mm
Pitch (P) 12.7 mm
6
Part Per Full Reel 2000
Reel Size 13
PRECISION TEMPERATURETO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02 TC03
PACKAGE DIMENSIONS *SOT-23B-3
.021 (0.54) .015 (0.37)
.103 (2.64) .083 (2.10)
.055 (1.40) .047 (1.20)
.040 (0.60) .017 (0.44) .120 (3.05) .105 (2.67)
.040 (1.02) .031 (0.79) .004 (0.10) .001(0.02) .080 (2.05) .070 (1.78)
8 MAX. .010 (0.25) .005 (0.13)
.007 (0.18) .003 (0.085)
*NOTE: SOT-23B-3 is equivalent to JEDEC (TO-236)
TO-92-3
.165 (4.19) .125 (3.18) .210 (5.33) .170 (4.32) .500 (12.70) MIN. .105 (2.67) .080 (2.03) .135 (3.43) MIN.
.205 (5.21) .175 (4.45) .018 (0.46) .015 (0.38)
.105 (2.67) .095 (2.41) .055 (1.40) .045 (1.14)
.018 (0.46) .015 (0.38)
Dimensions: inches (mm)
Sales Offices
TelCom Semiconductor 1300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 415-968-9241 FAX: 415-967-1590 E-Mail: liter@c2smtp.telcom-semi.com
TC02/03-04 6/18/97
TelCom Semiconductor Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236 7
TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957
Printed in the U.S.A

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