AD22105ARZ Analog Devices Inc, AD22105ARZ Datasheet

IC TEMP SENSOR/SWITCH LV 8SOIC

AD22105ARZ

Manufacturer Part Number
AD22105ARZ
Description
IC TEMP SENSOR/SWITCH LV 8SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD22105ARZ

Sensing Temperature
-40°C ~ 150°C
Output Type
Open Collector
Voltage - Supply
2.7 V ~ 7 V
Accuracy
±0.5°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Ic Output Type
Switch
Sensing Accuracy Range
± 0.5°C
Supply Current
120µA
Supply Voltage Range
2.7V To 7V
Sensor Case Style
SOIC
No. Of Pins
8
Termination Type
SMD
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Quantity
Price
Part Number:
AD22105ARZ
Manufacturer:
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Quantity:
20 000
Part Number:
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Quantity:
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Part Number:
AD22105ARZ-REEL7
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a
GENERAL DESCRIPTION
The AD22105 is a solid state thermostatic switch. Requiring
only one external programming resistor, the AD22105 can be set
to switch accurately at any temperature in the wide operating
range of –40 C to +150 C. Using a novel circuit architecture,
the AD22105 asserts an open collector output when the ambient
temperature exceeds the user-programmed setpoint temperature.
The AD22105 has approximately 4 C of hysteresis which prevents
rapid thermal on/off cycling.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
User-Programmable Temperature Setpoint
2.0 C Setpoint Accuracy
4.0 C Preset Hysteresis
Wide Supply Range (+2.7 V dc to +7.0 V dc)
Wide Temperature Range (–40 C to +150 C)
Low Power Dissipation (230 W @ 3.3 V)
APPLICATIONS
Industrial Process Control
Thermal Control Systems
CPU Monitoring (i.e., Pentium)
Computer Thermal Management Circuits
Fan Control
Handheld/Portable Electronic Equipment
OUT
Figure 1. Typical Application Circuit
Low Voltage, Resistor Programmable
8
1
+2.7V TO +7.0V
AD22105
7
2
TOP VIEW
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
The AD22105 is designed to operate on a single power supply
voltage from +2.7 V to +7.0 V facilitating operation in battery
powered applications as well as in industrial control systems.
Because of low power dissipation (230 W @ 3.3 V), self-
heating errors are minimized and battery life is maximized.
An optional internal 200 k
facilitate driving light loads such as CMOS inputs.
Alternatively, a low power LED indicator may be driven directly.
6
3
R
PULL–UP
5
4
OUT
GND
FUNCTIONAL BLOCK DIAGRAM
NC
1
2
3
4
R
SET
Thermostatic Switch
200k
TEMPERATURE
pull-up resistor is included to
AD22105
SENSOR
POINT
SET–
© Analog Devices, Inc., 1996
AD22105
Fax: 617/326-8703
7
8
6
5
NC
R
V
NC
SET
S

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AD22105ARZ Summary of contents

Page 1

... GENERAL DESCRIPTION The AD22105 is a solid state thermostatic switch. Requiring only one external programming resistor, the AD22105 can be set to switch accurately at any temperature in the wide operating range of – +150 C. Using a novel circuit architecture, the AD22105 asserts an open collector output when the ambient temperature exceeds the user-programmed setpoint temperature ...

Page 2

... SET 281.6 C SET 5 0 –50 – SET POINT TEMPERATURE – C Figure 2. Setpoint Resistor Values –2– = internal 200 k unless otherwise noted) LOAD Min Typ Max 0.5 2.0 3.0 0.05 ...

Page 3

... Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . +11 V Maximum Output Voltage (Pin +11 V Maximum Output Current (Pin Operating Temperature Range . . . . . . . . . . – +150 C Dice Junction Temperature . . . . . . . . . . . . . . . . . . . . +160 C Storage Temperature Range . . . . . . . . . . . . – +160 C Lead Temperature (Soldering, 10 sec +300 C *Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...

Page 4

... Figure 7. Setpoint Error vs. Supply Voltage Tolerance SET 120 110 100 100 125 150 Figure 8. Supply Current vs. Temperature (V = HIGH) OUT –4– –50 – 100 TEMPERATURE – C Figure 6. Hysteresis vs. Setpoint 2.0 1.5 +125 C 1.0 0.5 + ...

Page 5

T A 0.1 0.0 1µA 10µA 100µA I OUT Figure OUT OUT OUT 400 FLOW RATE – CFM Figure 10. Thermal Response vs. ...

Page 6

... Figure 9) of 250 mV, then the additional power dissipation would be approximately 1.25 mW. With a free air the internal die temperature could be 0.24 C higher than ambient leading to an increase of 0. hysteresis. In the presence of a heat sink or turbulent environment, the ...

Page 7

... In the first case, a rise in the IC junction tempera- ture above the ambient temperature is a function of two variables: the power consumption of the AD22105 and the thermal ...

Page 8

... R pin. Consequently, the actual SET setpoint temperature could be higher or lower than the intended setpoint temperature by about 1 C for each leakage. With power supply, an isolation resistance of 100 M would create leakage current giving a setpoint temperature error of about 0.7 C (the R potential) ...

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