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TelCom Semiconductor
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TC1023 Datasheet Preview

TC1023 Datasheet

(TC1024) PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS WITH SHUTDOWN MODE

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TC1023 pdf
PRECISION TEMPERATURE-TO-VOLTAGE
CONVERTERS WITH SHUTDOWN MODE
PRELIMINARY INFORMATION
TTCC110023
TTCC110024
PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS
WITH SHUTDOWN MODE
FEATURES
s Linearized Temperature-to-Voltage Converters
s Direct Centigrade Output Voltage Scaling (TC1023)
s Shutdown/Calibrate Mode
s Multi-Zone Temperature Sensing Capability
s Wide Temperature Measurement
Range (TC1024) ........................... – 20°C to +125°C
s Excellent Temperature Converter Linearity .. 0.8°C
Over Temperature
s High Temperature Converter Accuracy ......... ± 2°C
at 25°C Guaranteed
s Small Packages ......... 8-Pin SOIC and 8-Pin MSOP
APPLICATIONS
s Power Supply Thermal Shut-Down
s Temperature-Controlled Fans
s Temperature Measurement/Instrumentation
s Temperature Regulators
s Consumer Electronics
s Lithium Battery Temperature Monitor
GENERAL DESCRIPTION
The TC1023/1024 temperature sensors furnish a lin-
earized output voltage directly proportional to measured
temperature. The TC1023 has a temperature measure-
ment 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 resis-
tor to a negative voltage source is required for temperature
measurement below 0°C.
The TC1024 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
TC1023 (10mV/°C). The output voltage range is 100mV at
– 20°C to 1,750mV at +125°C. Both devices have a chip
enable input that reduces supply current to 1µA (typical)
when pulled active high. In this state, the output defaults to
a high resistance allowing an external reference voltage to
be directly connected for A/D calibration.
Small size, low cost, flexibility and low power operation
make the TC1023/1024 suitable for a wide range of gen-
eral purpose temperature measurement applications.
TYPICAL APPLICATION
VCC = 2.2V to 12V
VCC VOUT
TC1023
GND CE
MICROCONTROLLER
A/D
CONVERTER
I/O LINE
ORDERING INFORMATION
Part No.
Package
Output
Voltage
At 25°C
TC1023VOA
TC1023VUA
TC1024VOA
TC1024VUA
8-Pin SOIC
8-Pin MSOP
8-Pin SOIC
8-Pin MSOP
250mV
250mV
750mV
750mV
Temp. Range
– 20°C to +100°C
– 20°C to +100°C
– 20°C to +125°C
– 20°C to +125°C
PIN CONFIGURATION
8-Pin SOIC
MSOP-8
VOUT
NC
NC
GND
1
2
3
4
TC1023VOA
TC1024VOA
8 VCC VOUT 1
8 VCC
7 NC
6 NC
NC
NC
GND
2
3
4
TC1023VUA
TC1024VUA
7 NC
6 NC
5 CE
5 CE
TC1023/1024-05 6/12/97 TelCom Semiconductor reserves the right to make changes in the circuitry and 1specifications of its devices.



TelCom Semiconductor
TelCom Semiconductor

TC1023 Datasheet Preview

TC1023 Datasheet

(TC1024) PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS WITH SHUTDOWN MODE

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TC1023 pdf
PRELIMINARY INFORMATION
TC1023
TC1024
PRECISION TEMPERATURE-TO-VOLTAGE
CONVERTERS WITH SHUTDOWN MODE
ABSOLUTE MAXIMUM RATINGS *
Supply Voltage ............................................................15V
Input Voltage, Any Terminal .............. – 1.0 to (VCC +0.3V)
Operating Temperature (TC1023) ......... – 20°C to +100°C
Operating Temperature (TC1024) ......... – 20°C to +125°C
Storage Temperature ............................ – 55°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
* 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 perma-
nent 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 = – 20°C to +125°C, VCC = 5V ±5%, GND = 0V, unless otherwise specified.
Symbol Parameter
Test Conditions
Min Typ Max Unit
VCC Supply Voltage (TC1023)
(TC1024)
2.2 —
3.0 —
12
12
V
IS Supply Current
CE = VIL
(Note 1)
— 40 60 µA
ICE Shutdown Current
CE = VIH
(Note 2)
—1
5 µA
VIH CE Input Logic HIGH Level
VIL CE Input Logic LOW Level
ICE CE Input Leakage Current
tREC Recovery Time from Shutdown
CE = VIH or VIL
CE = step from VIH to VIL
(Note 3)
2.0 —
——
–1 —
— 400
—V
0.8 V
+1 µA
µsec
VOUT
VOUT Output Voltage (TC1024)
VOUT Output Voltage (TC1023)
TA = – 20°C and +125°C
TA = – 20°C and +100°C
Circuit per Figure 1:
R1 = 240k
VSS = – 12V
(Note 1)
270
– 230
1780
1030
mV
ISRC
VOUT Output Source Current
Accuracy at Room Temperature
TA = +25°C
(Note 4)
——
–2 —
1.0 mA
+2 °C
Accuracy at Minimum Temperature
TC1023: TA = – 20°C
TC1024: TA = – 20°C
(Note 4)
– 4 — +4 °C
Accuracy at Maximum Temperature
TC1023: TA = +100°C
TC1024: TA = +125°C
(Note 4)
– 3 — +3 °C
Nonlinearity
Note 5
– 0.8
+0.8
°C
Line Regulation
— 80
µV/V
AV
VOUTMAX
Average Slope of Output Voltage
Maximum Output Voltage
TC1023: 2.2V VCC 12V
TC1024: 3.0V VCC 12V
(Note 1)
— 10
— mV/°C
— VCC – 1.2
V
NOTES: 1. VOUT outputs open circuited.
2. VOUT is 0V through approximately 100kto ground when CE = VIH.
3. Recovery time is the period required for VOUT to rise from 0V (shutdown state) to the voltage corresponding to the measured
temperature driving a 100pF capacitive load.
4. 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.
5. Nonlinearity = deviation of output voltage versus temperature from the best-fit straight line over the device rated temperature range.
TC1023/1024-05 6/12/97
2


Part Number TC1023
Description (TC1024) PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS WITH SHUTDOWN MODE
Maker TelCom Semiconductor
Total Page 6 Pages
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