PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC02 TC03 TC03 PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS FEATURES 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 – 20°C to +100°C. 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 0°C. The TC02 has a temperature measurement range of – 20°C to +125°C, 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 – 20°C to 1,750mV at +125°C. Small size, low cost and low power operation make the TC02/03 suitable for a wide range of general purpose temperature measurement applications. ■ ■ ■ Linearized Temperature-to-Voltage Converters Direct Centigrade Output Voltage Scaling (TC03) Wide Temperature Measurement Range (TC02) ............................... – 20°C to +125°C Excellent Temperature Converter Linearity .. 0.8°C Over Temperature High Temperature Converter Accuracy .......... ±2°C at 25°C Guaranteed Small Packages ................ TO-92-3 and SOT-23B-3 APPLICATIONS ■ ■ ■ ■ ■ Power Supply Thermal Shut-Down Temperature-Controlled Fans Temperature Measurement/Instrumentation Temperature Regulators Consumer Electronics FUNCTIONAL BLOCK DIAGRAM ORDERING INFORMATION Part No. Package Output Voltage At 25°C TC02VNB *TC02VZB TC03VNB TC03VZB SOT-23B-3 TO-92 SOT-23B-3 TO-92 750mV 750mV 250mV 250mV Temp. Range – 20°C to +125°C – 20°C to +125°C – 20°C to +100°C – 20°C to +100°C * Contact factory for availability. . PIN CONFIGURATION VCC = 2.2V to 12V MICROCONTROLLER VCC *SOT-23B-3 (Top View) TO-92-3 1 2 3 A/D CONVERTER GND VOUT TC03 3 GND TC02VZB TC03VZB VCC VOUT NOTE: *SOT-23B-3 is equivalent to JEDEC (TO-236) TC02/03-2 7/10/97 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices. 1 GND 2 VOUT 1 VCC TC02VNB TC03VNB PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC03 ABSOLUTE MAXIMUM RATINGS * * 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. Supply Voltage ............................................................15V Input Voltage, Any Terminal .............. – 1.0 to (VCC +0.3V) Operating Temperature (TC02) ............. – 20°C to +125°C Operating Temperature (TC03) ............. – 20°C to +100°C Storage Temperature ............................ – 55°C to +150°C Lead Temperature (Soldering, 10 sec) SOT-23B-3 ..................................................... +260°C TO-92-3 .......................................................... +300°C ELECTRICAL CHARACTERISTICS : TA = – 20°C to +125°C, VCC = 5V ±5%, unless otherwise specified. Symbol Parameter VCC VCC IS ISRC Supply Voltage (TC02) Supply Voltage (TC03) Supply Current VOUT Output Source Current Accuracy at Room Temperature Accuracy at Minimum Temperature Accuracy at Maximum Temperature AV VOUTMAX Nonlinearity Line Regulation Average Slope of Output Voltage Maximum Output Voltage Test Conditions Note 1 TA = 25°C (Note 2) TA = – 20°C (Note 2) TC02: TA = +125°C TC03: TA = +100°C (Note 2) Note 3, 4 TC02: 3.0V ≤ VCC ≤ 12V TC03: 2.2V ≤ VCC ≤ 12V (Note 1) Min Typ Max Unit 3.0 2.2 — — –2 — — — 40 — ± 0.5 ±3 12 12 60 1.0 +2 — V V µA mA °C °C –3 –3 — — +3 +3 °C – 0.8 — — — 80 10 +0.8 — — °C µV/V mV/°C — — VCC – 1.2 V 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 OUTPUT STAGE 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 0°C to 100°C. A pull-down resistor (R1 in Figure 2) must be added from VOUT to the negative power supply for measuring temperatures less than 0°C. The value of the resistor must be chosen to limit the maximum current pulled from the output to the negative supply to – 50µA (i.e. R1 = VSS/50µA). 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 2kΩ (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 0.1µF bypass capacitor from VCC to GND is recommended. TC02/03-2 7/10/97 2 PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC03 1.8 1.7 1.6 TC02: VOUT = (10mV/°C) (Temperature °C) + 500mV TC03: VOUT = (10mV/°C) (Temperature °C) 1.5 1.4 1.3 1.2 VOUT (VOLTS) 1.1 TC02 1.0 0.9 0.8 0.7 TC03 0.6 0.5 0.4 0.3 0.2 0.1 0 – 0.1 – 0.2 – 40 – 30 – 20 0 –10 10 20 30 40 50 60 70 80 90 100 110 120 TEMPERATURE (°C) Figure 1. Output Voltage vs Temperature VCC = 2.2V to 12.0V MIN. VCC = 3.0V to 12.0V VCC TC03 VCC GND VOUT VOUT VOUT TC02 R1 GND R1 = VSS/50µA VSS TC02 (– 20°C to +125°C) TC03 (– 20°C to +100°C) Figure 2. TC02/03 Power Supply Connections for Full Scale Measurements TC02/03-2 7/10/97 3 VOUT 130 PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC03 TYPICAL CHARACTERISTICS Supply Current vs. Temperature Thermal Time Constant (Sec) vs. Air Velocity 60 100 50 80 THERMAL TIME (SEC) SUPPLY CURRENT (µA) VCC= +5V 60 40 20 10 –50 40 30 20 10 0 –25 0 25 50 75 100 125 0 400 600 125 100 2V/DIV 75 0V 50 500mV/DIV 25 0V 0 0 20 40 60 80 100 TIME (SEC.) TC02/03-2 7/10/97 800 1000 VOUT (From Power Initially Applied) vs. Time (Turn-on Response) Thermal Response in Still Air vs.Time PERCENT OF FINAL VALUE (%) 200 AIR VELOCITY (FPM) TEMPERATURE (°C) 20µsec/DIV 4 PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC03 MARKING TO-92-3 SOT-23B-3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 a & b = part number code and temperature range TC02VNB = AA – 20°C to 125°C TC03VNB = AB – 20°C to 100°C a & b = TC (fixed) c, d & e = blank f, g, h & i = part number A A ex: 02 = uuuu A B ex: 03 = uuuu j = temperature range C = – 20°C to +125°C D = – 20°C to +100°C c = year and quarter d = lot ID k, l, m, n & o = traceability code TAPING FORMS SOT-23B-3 PIN 1 User Direction of Feed User Direction of Feed Device Marking W Device Marking PIN 1 P Reverse Reel Component Orientation for 723 or RT Suffix Device (Mark Upside Down) Standard Reel Component Orientation for 713 or TR Suffix Device (Mark Right Side Up) Tape & Reel Specifications Table Package 3L SOT-23B TC02/03-2 7/10/97 Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8 mm 4 mm 3000 7 5 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 W Back Tape User Direction of Feed P Mark Face MARK FACE MARK FACE MARK FACE Seal Tape W Back Tape 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 Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TO-92-3 18 mm 12.7 mm 2000 13 TC02/03-2 7/10/97 6 PRECISION TEMPERATURETO -VOLTAGE CONVERTERS TC02 TC03 PACKAGE DIMENSIONS *SOT-23B-3 .021 (0.54) .015 (0.37) .055 (1.40) .047 (1.20) .103 (2.64) .083 (2.10) .040 (0.60) .017 (0.44) .120 (3.05) .105 (2.67) .040 (1.02) .031 (0.79) .007 (0.18) .003 (0.085) 8° MAX. .004 (0.10) .001(0.02) .080 (2.05) .070 (1.78) .010 (0.25) .005 (0.13) *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. .205 (5.21) .175 (4.45) .105 (2.67) .080 (2.03) .105 (2.67) .095 (2.41) .018 (0.46) .015 (0.38) .135 (3.43) MIN. .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: 650-968-9241 FAX: 650-967-1590 E-Mail: [email protected] TC02/03-2 7/10/97 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