INTEGRAL IL135Z

IL135Z
INTEGRATED CIRCUIT OF TEMPERATURE SENSOR
(analog LM135Z, SGS-Thomson)
Microcircuit IL135Z is precision temperature sensor with calibration
capacity . Microcircuit operates as Zener diode with brake down
voltage being in direct proportion to to absolute temperature (10
mV/OK). Full dynamic resistance of the circuit is less than 1 Оhm at
operation current 450 µА...5 mА. The sensor calibrated at the
temperature 25OС,has typical error less than 1OС in the temperature
range above 100OС. The peculiarity of the circuit IL135Z is the linear
dependence of output voltage versus temperature.
Packaged IC type:
IC features
O
calibration in К
initial measurement accuracy 1OK
range of operating supply current from 450 µА to 5 mА
Full dynamic resistance less than 1 Оhm
IL135Z, TO-92
Bottom view
Figure 1 - Package pin
definitions
Figure 2 - circuitry IL135Z.
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Тable 1 - Maximum ratings
Name of parameter
Symbol
Standard
min
IC current
reverse
direct
IR
IF
Air operation temperature: *
- constant mode
- short-time
Storage temperature
max
15
10
--
Unit of
measurement
mA
°С
TOPER
- 55
150
-65
150
200
150
°С
Standard
Type
max
Test
conditions
Temperature
°С
Unit
V
°С
°С
Tstg
Note - *TJ ≤ 150°С
Тable 2 – Temperature parameters.
Name of parameter
output voltage, V
Non-calibrated temperature
error
temperature error at calibration
25°С
Calibrated error in extended
temperature range
Non-linearity of temperature
characteristic
Symbol
UOUT
∆Т1
min
2,95
-
∆Т2
∆Т3
3,01
3
5
1,5
IR = 1 mA
IR = 1 mA
-
2,98
1
2
0,5
IR = 1 mA
25
25
-55 ÷ 150
-55 ÷ 150
-
2
-
Тcase=Тmax
-55 ÷ 150
°С
-55 ÷ 150
°С
periodical
∆Т4
-
0,3
1
IR = 1 mA
Standard
type.
max
Test
conditions
Тable 3 – Electrical parameters.
Name of parameter
Measurement of output voltage
in supply currents range
Dynamic impedance
Temperature coefficient of
output voltage
Time constant:
-still air
-speed of air is 0,5 m/с
- agitated oil
Time stability
Symbo
l
min
∆UOUT
-
∆R1
ТКН
-
τТ
Temperat
ure
°С
-55 ÷ 150
mV
10
0,45 mА ≤ I R
≤ 5 mА
0,5
+10
-
IR = 1 mА
-
25
25
Ohm
mV/°С
-
-55 ÷ 150
С
80
10
1
0,2
2,5
°С/
1000h
Note – Precise measurements done in agitated oil bath. For other conditions there should be taking into
consideration self-heating .
Тstab
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
-
125
IL135Z
Calibration error, (оС)
Change of reverse voltage, (mV)
Temperature , (оС)
Reverse current, (mА)
Figure 3 –Reverse voltage versus reverse
current
Figure 4 – Calibration error versus
temperature
Reverse current, (mА)
Input and output voltage, (V)
Time, (mks)
reverse voltage, (V)
Figure 5 – Reverse current versus reverse
voltage
Figure 6 – Output signal response time
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected].by
URL: www.bms.by
IL135Z
Noise density (nV/√Hz)
Direct dynamic resistance , (Оhm)
Frequency, (Hz)
Frequency, (Hz)
Figure 7 – Dynamic resistance versus
frequency
Figure 8 – Noise voltage
Thermal resistance, (оС/Wt)
Time constant, ( с )
Air motion speed, (m/с)
Air motion speed, (m/с)
Figure 9 – Thermal resistance versus air
motion speed
Figure 10 – Time constant versus air motion
speed
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Heat conduction , (%)
Heat conduction, (%)
Time, (min)
Time, (min)
Figure 11 – Time dependence of heat
conduction in still air
Figure 12 – Time dependence of heat
conduction in agitated oil
Direct voltage, (V)
Direct current, (mА)
Figure 13 – Dependence of direct voltage on direct current
Information for application.
There is a simple technique of the device calibration for improving precision of
temperature measurement (see typical application circuits).
Calibration of the device occurs in one spot as the IC output voltage is proportional to absolute
temperature with sensor voltage extrapolation to 0 V at 0оК (-273,15оС). The errors in dependence
of output voltage on temperature are determined only by characteristic incline. Therefore bias
calibration at one temperature corrects errors in the whole temperature range. Output voltage of
calibrated or non calibrated circuit may be derived from the following equation:
VOT = VOTO
T
;
To
where Т – unknown temperature;
ТО – reference temperature (in оК).
Nominally IC output calibrated to the value 10 mV/ оК.
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
To ensure measurement precision they apply some rules. Degradation of the precision when
self-heating is proper to any devices of temperature sensors. The circuit should operate at low
operating current but sufficient for controlling the sensor and its calibration circuit at maximum
operating temperature.
When using the sensor in the field with constant thermal resistance, error when self-heating may
be reduced by external calibration. It can be done at the circuit bias when applying temperaturestabilized current. Thus heating will be proportional to Zener diode voltage. In this case error when
self-heating is proportional to absolute temperature as the error of scaling coefficient.
Typical application circuits.
Figure 14 – Basic circuit of temperature sensor
Figure 16 – Temperature sensor with external
calibration *
Figure 15 – Application circuit of
temperature sensor
with wide range supply voltage
Figure 17 – Sequential sensor
connection for increase of temperature
bias voltage–
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Figure 18 – Circuit of isolated temperature sensor
Figure 19 – Temperature regulator
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Figure 20 – Thermal sensor with 1000 scale
* Calibration for 2,7315 V on output of LM308
Figure 21 – Differential temperature sensor
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Thermo
couple
R3
Thermo electrical
coefficient
377
52,3 µV/оС
Оhm
T
308
42,8 µV/оС
Оhm
K
293
40,8 µV/оС
Оhm
S
45,8
6,4 µV/оС
Оhm
Adjustment: compensation of sensor and
resistor tolerances
1 Selection of 1N4568
2 Adjustment of voltage drop on element
R3 by the resistor R1 to obtain the value
of thermoelectrical coefficient, multiplied
by the ambient temperature (in K
degrees).
3 Selection of IL135Z and adjustment of
R2 for setting voltage drop on the element
R3 according to thermocouple type
J
J – 14,32 mV
T – 11,79 mV
K – 11,17 mV
S – 1,768 mV
Figure 22 – Circuit of cold junction compensation (compensation for ground thermocouple)
*Value of R3 nominal for this thermocouple type
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IL135Z
Thermocouple
J
T
R3
R4
1050
Оhm
365 Оhm
856
Оhm
315 Оhm
Тhermoelectric
al coefficient
52,3 µV/оС
42,8 µV/оС
816
300 Оhm
40,8 µV/оС
Оhm
S
128
46,3 Оhm
6,4 µV/оС
Оhm
Adjustment: compensation of sensor and
resistor tolerances
1 Adjustment by the resistor R1 for obtaining
voltage drop on the element R3, equal to
thermoelectrical coefficient multiplied by the
ambient temperature (in K degrees)
2 Adjustment of the resistor R2 for obtaining
some voltage drop on the element R4 according
to thermocouple type
K
J – 14,32 mV
T – 11,79 mV
K – 11,17 mV
S – 1,768 mV
Figure 23 – Circuit of cold junction compensation with unipolar supply
*Value of R3 and R4 nominals for this thermocouple type
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax:
+375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by