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Datasheet: TC02VZB (TelCom Semiconductor, Inc)

PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS

 

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TelCom Semiconductor, Inc

Document Outline

1
TC02
TC03
PRELIMINARY INFORMATION
PRECISION TEMPERATURE-
TO -VOLTAGE CONVERTERS
TC02/03-04 6/18/97
TC02
TC03
FUNCTIONAL BLOCK DIAGRAM
ORDERING INFORMATION
Output
Voltage
Part No.
Package
At 25
C
Temp. Range
TC02VNB
*SOT-23B-3
750mV
20
C to +125
C
TC02VZB
TO-92
750mV
20
C to +125
C
TC03VNB
*SOT-23B-3
250mV
20
C to +100
C
TC03VZB
TO-92
250mV
20
C to +100
C
NOTE: *SOT-23B-3 is equivalent to JEDEC (TO-236)
.
PIN CONFIGURATION
PRECISION TEMPERATURE-TO-VOLTAGE CONVERTERS
FEATURES
s
Linearized Temperature-to-Voltage Converters
s
Direct Centigrade Output Voltage Scaling (TC03)
s
Wide Temperature Measurement
Range (TC02) ............................... 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 ................ TO-92-3 and SOT-23B-3
APPLICATIONS
s
Power Supply Thermal Shut-Down
s
Temperature-Controlled Fans
s
Temperature Measurement/Instrumentation
s
Temperature Regulators
s
Consumer Electronics
GENERAL DESCRIPTION
The TC02/03 temperature sensors furnish a linearized
output voltage directly proportional to measured tempera-
ture. The TC03 has a temperature measurement range of
20
C to +100
C. Its output voltage is directly calibrated in
degrees Centigrade (i.e. V
OUT
= 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.
VCC
V
CC
VOUT
V
OUT
GND
GND
TC02VNB
TC03VNB
TC02VZB
TC03VZB
1
1
2
2
3
3
TC03
V
CC
= 2.2V to 12V
V
CC
V
OUT
GND
MICROCONTROLLER
A/D
CONVERTER
*SOT-23B-3
(Top View)
TO-92-3
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
NOTE: *SOT-23B-3 is equivalent
to JEDEC (TO-236)
2
TC02
TC03
PRECISION TEMPERATURE-
TO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02/03-04 6/18/97
* 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.
ABSOLUTE MAXIMUM RATINGS *
Supply Voltage ............................................................ 15V
Input Voltage, Any Terminal .............. 1.0 to (V
CC
+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 :
T
A
= 20
C to +125
C
,
V
CC
= 5V
5%,
unless otherwise specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
V
CC
Supply Voltage (TC02)
3.0
--
12
V
V
CC
Supply Voltage (TC03)
2.2
--
12
V
I
S
Supply Current
Note 1
--
40
60
A
I
SRC
V
OUT
Output Source Current
--
--
1.0
mA
Accuracy at Room Temperature
T
A
= 25
C (Note 2)
2
0.5
+2
C
Accuracy at Minimum Temperature
TC02: T
A
= 20
C
7
0.5
+5
C
TC03: T
A
= 20
C
7
0.5
+5
(Note 2)
Accuracy at Maximum Temperature
TC02: T
A
= +125
C
3
--
+3
C
TC03: T
A
= +100
C
3
--
+3
(Note 2)
Nonlinearity
Note 3, 4
0.8
--
+0.8
C
Line Regulation
--
80
--
V/V
A
V
Average Slope of Output Voltage
--
10
--
mV/
C
V
OUTMAX
Maximum Output Voltage
TC02: 3.0V
V
CC
12V
TC03: 2.2V
V
CC
12V
--
--
V
CC
1.2
V
(Note 1)
DETAILED DESCRIPTION
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 V
OUT
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
50
A (i.e. R1 = V
SS
/50
A).
Notes: 1. V
OUT
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.
OUTPUT STAGE
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 2k
(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 0.1
F bypass capacitor from V
CC
to GND is
recommended.
3
TC02
TC03
PRELIMINARY INFORMATION
PRECISION TEMPERATURE-
TO -VOLTAGE CONVERTERS
TC02/03-04 6/18/97
Figure 1. Output Voltage vs Temperature
Figure 2. TC02/03 Power Supply Connections for Full Scale Measurements
TC03
GND
TC03 ( 20
C to +100
C)
V
CC
= 2.2V to 12.0V MIN.
V
V
OUT
CC
V
OUT
R1
R1 = V
SS
/50
A
V
SS
TC02
GND
TC02 ( 20
C to +125
C)
V
CC
= 3.0V to 12.0V
V
CC
V
OUT
V
OUT
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.1
0.2
40
V
OUT
(VOLTS)
TEMPERATURE (
C)
30
20
10
0
10
20
30
40
50
60
70
80
90
100
110
120
130
TC02
TC03
TC02: VOUT = (10mV/
C) (Temperature
C) + 500mV
TC03: VOUT = (10mV/
C) (Temperature
C)
4
TC02
TC03
PRECISION TEMPERATURE-
TO -VOLTAGE CONVERTERS
PRELIMINARY INFORMATION
TC02/03-04 6/18/97
TYPICAL CHARACTERISTICS
Supply Current vs.
Temperature
20
sec/DIV
VOUT (From Power Initially Applied)
vs. Time (Turn-on Response)
2V/DIV
0V
500mV/DIV
0V
AIR VELOCITY (FPM)
Thermal Time Constant
(Sec) vs. Air Velocity
60
50
40
30
20
10
0
THERMAL TIME (SEC)
0
400
600
800
1000
200
TEMPERATURE (
C)
100
80
60
40
20
10
SUPPLY CURRENT (
A)
50
25
0
25
50
75
100
125
VCC= +5V
Thermal Response
in Still Air vs.Time
TIME (SEC.)
125
100
75
50
25
0
PERCENT OF FINAL VALUE (%)
0
20
40
60
80
100
5
TC02
TC03
PRELIMINARY INFORMATION
PRECISION TEMPERATURE-
TO -VOLTAGE CONVERTERS
TC02/03-04 6/18/97
MARKING
SOT-23B-3
TO-92-3
9
14
4
10
15
5
8
13
3
7
12
2
6
11
1
&
= part number code and temperature range
TC02VNB = AA 20
C to 125
C
TC03VNB = AB 20
C to 100
C
ex: 02 =
kkkk
ex: 03 =
kkkk
= year and quarter
= lot ID
A B
A A
&
= TC (fixed)
,
&
= blank
,
,
&
= part number
= temperature range
C = 20
C to +125
C
D = 20
C to +100
C
,
,
,
&
= traceability code
TAPING FORMS
W
User Direction of Feed
User Direction of Feed
Device
Marking
Device
Marking
PIN 1
P
PIN 1
Standard Reel Component Orientation
for 713 or TR Suffix Device
(Mark Right Side Up)
Reverse Reel Component Orientation
for 723 or RT Suffix Device
(Mark Upside Down)
Tape & Reel Specifications Table
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
3L SOT-23B
8 mm
4 mm
3000
7
SOT-23B-3
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