2002 Microchip Technology Inc.
DS21496B-page 1
TC1046
Features
Supply Voltage Range: 2.7V to 4.4V
Wide Temperature Measurement Range:
-40
o
C to +125
C
High Temperature Converter Accuracy:
2
o
C, Max, at 25C
Linear Temperature Slope: 6.25mV/
o
C
Very Low Supply Current: 35
A Typical
Small 3-Pin SOT-23B Package
Applications
Cellular Phones
Power Supply Thermal Shutdown
Temperature Controlled Fans
Temperature Measurement/Instrumentation
Temperature Regulators
Consumer Electronics
Portable Battery Powered Equipment
Device Selection Table
Package Type
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.
Functional Block Diagram
Part Number
Package
Temp. Range
TC1046VNB
3-Pin SOT-23B
-40C to +125C
Note: *3-Pin SOT-23B is equivalent to JEDEC TO-236
V
OUT
V
SS
V
DD
3-Pin SOT-23B*
TC1046
1
2
3
TC1046
V
DD
= 2.5V to 5.5V
V
DD
1
2
3
V
OUT
PICmicro
A/D
Converter
V
SS
Microcontroller
High Precision Temperature-to-Voltage Converter
TC1046
DS21496B-page 2
2002 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage ......................................................+7V
Voltage on Any Pin with Respect to Supplies:
................................................. V
SS
-0.3 to V
DD
+ 0.3V
Operating Temperature ...................... -40C to +125C
Storage Temperature Range .............. -55C to +150C
*Stresses above those listed under "Absolute Maximum Rat-
ings" 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. Expo-
sure to Absolute Maximum Rating conditions for extended
periods may affect device reliability.
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1
TABLE 2-1:
PIN FUNCTION TABLE
TC1046 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: These specifications apply for the entire supply voltage range and for T
A
= -40C to +125C, unless
otherwise specified.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
V
DD
Supply Voltage
2.7
--
4.4
V
I
Q
Supply Current, Operating
--
35
60
A
A
V
Average Slope of Output Voltage
--
6.25
--
mV/C
TMP
ACY
Temperature Accuracy at 25C
-2
-3
--
0.5
0.5
1.0
+2
+3
--
C
C
C
T
A
= 25C
T
A
= +125C
T
A
= -40C
V
OUT
Output Voltage
--
568
1187
174
580
1205
193
592
1224
mV
mV
mV
T
A
= -40C
T
A
= 25C
T
A
= +125C
I
OUT
Output Source and Sink Current
100
--
--
A
Pin Number
(3-Pin SOT-23B)
Symbol
Description
1
V
DD
Input Supply Voltage
2
V
OUT
Temperature Sensor Output
3
V
SS
Ground
2002 Microchip Technology Inc
DS21496B-page 3
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
1.20525
1.174
1.049
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
V
OUT
(V
olts)
TEMPERATURE (C)
V
OUT
= (6.25 mV/ (C) (Temperature (C) + 424mV
TC1046
DS21496B-page 4
2002 Microchip Technology Inc.
4.0
TYPICAL CHARACTERISTICS
Note:
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.
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
-40
-50
-30 -20 -10
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140
TEMP
.
A
CCURA
CY (
C)
TEMPERATURE (C)
Temperature Accuracy vs. Temperature
V
DD
= 2.5V
V
DD
= 5.5V
60.0
50.0
40.0
30.0
20.0
10.0
0.0
I
DD
(A)
TEMPERATURE (C)
Supply Current I
DD
vs. Temperature
40
25
10
5
20
35
50
65
80
95
110
125
V
DD
=5.5V
V
DD
= 2.5V
2002 Microchip Technology Inc
DS21496B-page 5
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
PIN 1
Standard Reel Component Orientation
For TR Suffix Device
(Mark Right Side Up)
W
P
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
3-Pin SOT-23B
8 mm
4 mm
3000
7 in
Carrier Tape, Number of Components Per Reel and Reel Size
TC1046
DS21496B-page 6
2002 Microchip Technology Inc.
5.3
Package Dimensions
.021 (0.54)
.015 (0.37)
.055 (1.40)
.047 (1.20)
.104 (2.64)
.083 (2.10)
.120 (3.05)
.105 (2.67)
.007 (0.18)
.003 (0.08)
.010 (0.25)
.005 (0.13)
.024 (0.60)
.017 (0.44)
.004 (0.10)
.001 (0.02)
.040 (1.02)
.031 (0.79)
.081 (2.05)
.070 (1.78)
8
MAX.
3-Pin SOT-23B
Dimensions: inches (mm)
2002 Microchip Technology Inc.
DS21496B-page 7
TC1046
SALES AND SUPPORT
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
Your local Microchip sales office
2.
The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3.
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.
TC1046
DS21496B-page 8
2002 Microchip Technology Inc.
NOTES:
2002 Microchip Technology Inc.
DS21496B-page 9
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 com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
K
EE
L
OQ
, microID,
MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
nology 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.
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
8-bit MCUs, K
EE
L
OQ
code hopping
devices, Serial EEPROMs, microperipherals,
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addition, Microchip's quality system for the
design and manufacture of development
systems is ISO 9001 certified.
DS21496B-page 10
2002 Microchip Technology Inc.
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03/01/02
W
ORLDWIDE
S
ALES
AND
S
ERVICE
*DS21496B*
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