TC1046 High Precision Temperature-to-Voltage Converter Features General Description • Supply Voltage Range: 2.7V to 4.4V • Wide Temperature Measurement Range: -40oC to +125οC • High Temperature Converter Accuracy: ± 2oC, Max, at 25°C • Linear Temperature Slope: 6.25mV/oC • Very Low Supply Current: 35µA Typical • Small 3-Pin SOT-23B Package The TC1046 is a linear output temperature sensor whose output voltage is directly proportional to measured temperature. The TC1046 can accurately measure temperature from -40°C to +125°C. The TC1046 is packaged in a 3-Pin SOT-23B package, making them ideal for space critical applications. Applications • • • • • • • The output voltage range for these devices is typically 174mV at -40°C, 424mV at 0°C, 580 mV at +25°C, and 1205mV at +125°C. A 6.25mV/°C voltage slope allows for the wide temperature range. Cellular Phones Power Supply Thermal Shutdown Temperature Controlled Fans Temperature Measurement/Instrumentation Temperature Regulators Consumer Electronics Portable Battery Powered Equipment Functional Block Diagram VDD = 2.5V to 5.5V PICmicro® Microcontroller 1 VDD VOUT TC1046 Device Selection Table Part Number Package Temp. Range TC1046VNB 3-Pin SOT-23B -40°C to +125°C 2 A/D Converter VSS 3 Package Type 3-Pin SOT-23B* VSS 3 TC1046 1 2 VDD VOUT Note: *3-Pin SOT-23B is equivalent to JEDEC TO-236 2002 Microchip Technology Inc. DS21496B-page 1 TC1046 1.0 ELECTRICAL CHARACTERISTICS *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 operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings* Supply Voltage ......................................................+7V Voltage on Any Pin with Respect to Supplies: ................................................. VSS -0.3 to V DD + 0.3V Operating Temperature ...................... -40°C to +125°C Storage Temperature Range .............. -55°C to +150°C TC1046 ELECTRICAL SPECIFICATIONS Electrical Characteristics: These specifications apply for the entire supply voltage range and for TA = -40°C to +125°C, unless otherwise specified. Symbol Parameter Min Typ Max Units Test Conditions VDD Supply Voltage 2.7 — 4.4 V IQ Supply Current, Operating — 35 60 µA AV Average Slope of Output Voltage — 6.25 — TMPACY Temperature Accuracy at 25°C -2 -3 — ±0.5 ±0.5 1.0 +2 +3 — °C °C °C TA = 25°C TA = +125°C TA = -40°C VOUT Output Voltage — 568 1187 174 580 1205 193 592 1224 mV mV mV TA = -40°C TA = 25°C TA = +125°C IOUT Output Source and Sink Current 100 — — µA 2.0 mV/°C PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1 TABLE 2-1: PIN FUNCTION TABLE Pin Number (3-Pin SOT-23B) Symbol Description 1 VDD Input Supply Voltage 2 VOUT Temperature Sensor Output 3 VSS DS21496B-page 2 Ground 2002 Microchip Technology Inc. TC1046 3.0 DETAILED DESCRIPTION The TC1046 has an output voltage that varies linearly with temperature in degrees Celsius. See Figure 3-1, “Output Voltage versus Temperature” for the TC1046. The temperature slope is fixed at 6.25mV/°C and the output voltage at 0°C is 424mV. FIGURE 3-1: OUTPUT VOLTAGE VS. TEMPERATURE VOUT = (6.25 mV/ (˚C) (Temperature (˚C) + 424mV 1.20525 1.174 1.049 VOUT (Volts) 0.924 0.799 0.674 0.549 0.424 0.299 0.174 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 125 TEMPERATURE (˚C) 2002 Microchip Technology Inc DS21496B-page 3 TC1046 4.0 Note: TYPICAL CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Temperature Accuracy vs. Temperature 4.0 TEMP. ACCURACY (˚C) 3.0 2.0 VDD VDD = 2.5V = 5.5V 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 TEMPERATURE (˚C) Supply Current IDD vs. Temperature 60.0 50.0 VDD =5.5V IDD (µA) 40.0 30.0 VDD 20.0 = 2.5V 10.0 0.0 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (˚C) DS21496B-page 4 2002 Microchip Technology Inc. TC1046 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 1 & 2 = part number code + temperature range and voltage (two letter code) Ex: 1046VNB = AK 3 = Year and two-month period code 4 = Lot ID number 5.2 Taping Form Component Taping Orientation for 3-Pin SOT-23B (JEDEC TO-236) Devices User Direction of Feed Device Marking W PIN 1 P Standard Reel Component Orientation For TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package 3-Pin SOT-23B 2002 Microchip Technology Inc Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8 mm 4 mm 3000 7 in DS21496B-page 5 TC1046 5.3 Package Dimensions 3-Pin SOT-23B .021 (0.54) .015 (0.37) .055 (1.40) .047 (1.20) .104 (2.64) .083 (2.10) .024 (0.60) .017 (0.44) .120 (3.05) .105 (2.67) .007 (0.18) .003 (0.08) 8° MAX. .040 (1.02) .031 (0.79) .004 (0.10) .001 (0.02) .081 (2.05) .070 (1.78) .010 (0.25) .005 (0.13) Dimensions: inches (mm) DS21496B-page 6 2002 Microchip Technology Inc. TC1046 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. DS21496B-page 7 TC1046 NOTES: DS21496B-page 8 2002 Microchip Technology Inc. TC1046 Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. 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