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TC1046
High Precision Temperature-to-Voltage Converter
Features
* Supply Voltage Range: 2.7V to 4.4V * Wide Temperature Measurement Range: -40oC to +125C * High Temperature Converter Accuracy: 2oC, Max, at 25C * Linear Temperature Slope: 6.25mV/oC * Very Low Supply Current: 35A Typical * Small 3-Pin SOT-23B Package
General Description
The TC1046 is a linear output temperature sensor whose output voltage is directly proportional to measured temperature. The TC1046 can accurately measure temperature from -40C to +125C. The output voltage range for these devices is typically 174mV at -40C, 424mV at 0C, 580 mV at +25C, and 1205mV at +125C. A 6.25mV/C voltage slope allows for the wide temperature range. The TC1046 is packaged in a 3-Pin SOT-23B package, making them ideal for space critical applications.
Applications
* * * * * * * 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(R) Microcontroller 2 A/D Converter
1 VDD VOUT
Device Selection Table
Part Number TC1046VNB Package 3-Pin SOT-23B Temp. Range -40C to +125C
TC1046
VSS 3
Package Type
3-Pin SOT-23B*
VSS 3
TC1046
1 VDD 2 VOUT
Note: *3-Pin SOT-23B is equivalent to JEDEC TO-236
2002 Microchip Technology Inc.
DS21496B-page 1
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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 ...................... -40C to +125C Storage Temperature Range .............. -55C to +150C
TC1046 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: These specifications apply for the entire supply voltage range and for TA = -40C to +125C, unless otherwise specified. Symbol VDD IQ AV TMPACY Supply Voltage Supply Current, Operating Average Slope of Output Voltage Temperature Accuracy at 25C Parameter Min 2.7 -- -- -2 -3 -- -- 568 1187 100 Typ -- 35 6.25 0.5 0.5 1.0 174 580 1205 -- Max 4.4 60 -- +2 +3 -- 193 592 1224 -- Units V A mV/C C C C mV mV mV A TA = 25C TA = +125C TA = -40C TA = -40C TA = 25C TA = +125C Test Conditions
VOUT
Output Voltage
IOUT
Output Source and Sink Current
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1
TABLE 2-1:
PIN FUNCTION TABLE
Symbol VDD VOUT VSS Input Supply Voltage Temperature Sensor Output Ground Description
Pin Number (3-Pin SOT-23B) 1 2 3
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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 0C is 424mV.
FIGURE 3-1:
OUTPUT VOLTAGE VS. TEMPERATURE
VOUT = (6.25 mV/ (C) (Temperature (C) + 424mV
1.20525 1.174 1.049 0.924 VOUT (Volts) 0.799 0.674 0.549 0.424 0.299 0.174 -40 -30 -20 -10 30 50 60 70 80 90 100 110 120 125
0
10
20
40
TEMPERATURE (C)
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DS21496B-page 3
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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 3.0 TEMP. ACCURACY (C) 2.0 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 VDD VDD = 2.5V = 5.5V
TEMPERATURE (C)
Supply Current IDD vs. Temperature
60.0
50.0 VDD 40.0 IDD (A) =5.5V
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)
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DS21496B-page 4
2002 Microchip Technology Inc.
TC1046
5.0
5.1
PACKAGING INFORMATION
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 Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
3-Pin SOT-23B
8 mm
4 mm
3000
7 in
2002 Microchip Technology Inc
DS21496B-page 5
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TC1046
5.3 Package Dimensions
3-Pin SOT-23B
.021 (0.54) .015 (0.37)
.104 (2.64) .083 (2.10)
.055 (1.40) .047 (1.20)
.024 (0.60) .017 (0.44)
.120 (3.05) .105 (2.67) 8 MAX. .010 (0.25) .005 (0.13) .007 (0.18) .003 (0.08)
.040 (1.02) .031 (0.79) .004 (0.10) .001 (0.02) .081 (2.05) .070 (1.78)
Dimensions: inches (mm)
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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.
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TC1046
NOTES:
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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.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro (R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21496B-page 9
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WORLDWIDE SALES AND SERVICE
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03/01/02
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DS21496B-page 10
2002 Microchip Technology Inc.
*B69412SD*

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