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ADT6501 Datasheet(PDF) 1 Page - Analog Devices

No. de Pieza. ADT6501
Descripción  Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23
Descarga  16 Pages
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Fabricante  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADT6501 Datasheet(HTML) 1 Page - Analog Devices

 
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Low Cost, 2.7 V to 5.5 V, Micropower
Temperature Switches in SOT-23
Preliminary Technical Data
ADT6501/ADT6502/ADT6503/ADT6504
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2006 Analog Devices, Inc. All rights reserved.
FEATURES
±0.5°C (typ) accuracy over temperature range
Factory set trip points from −45°C to +15°C in 10°C
increments
Factory set trip points from +35°C to +115°C in 10°C
increments
No external components required
Max temperature of +125°C
Open-drain output (ADT6501/ADT6503)
Push-pull output (ADT6502/ADT6504)
Pin selectable hysteresis of 2°C and 10°C
Supply current of 30
μA (typ)
Space saving 5-lead SOT23 package
APPLICATIONS
Medical equipment
Automotive
Cell phone
Hard disk drives
Personal computers
Electronic test equipment
Domestic appliances
Process control
FUNCTIONAL BLOCK DIAGRAM
CLK AND
TIMING
GENERATION
4
3
LPF
Σ-Δ
DIGITAL
COMPARATOR
TOVER
VCC
1
GND
HYST
TEMPERATURE
SENSOR
1-BIT
12-BIT
DECIMATOR
1-BIT
DAC
REFERENCE
+
5
FACTORY PRESET
TRIP POINT
REGISTER
2
GND
2°C/10°C
Figure 1.
GENERAL DESCRIPTION
The ADT6501/ADT6502/ADT6503/ADT6504 are trip point
temperature switches available in a 5-lead SOT23 package. It
contains an internal band gap temperature sensor for local
temperature sensing. When the temperature crosses the trip
point setting, the logic output is activated. The ADT6501/
ADT6503 logic output is active low and open-drain. The
ADT6502/ADT6504 logic output is active high and push-pull.
The temperature is digitized to a resolution of +0.0625°C
(12 bit). The factory settings are 10°C apart starting from −45°C
to +15°C for the cold threshold models and from +35°C to
+115°C for the hot threshold models.
These devices require no external components and typically
consume 30μA supply current. Hysteresis is pin selectable at
2°C and 10°C. The temperature switch is specified to operate
over the supply range of 2.7 V to 5.5 V.
ADT6501 and ADT6502 are used for monitoring temperatures
from +35°C to +115°C only. Hence, the logic output pin
becomes active when the temperature goes higher than the
selected trip point temperature. The ADT6503 and ADT6504
are used for monitoring temperatures from −45°C to +15°C
only. Hence, the logic output pin becomes active when the
temperature goes lower than the selected trip point
temperature.
PRODUCT HIGHLIGHTS
1.
±0.5°C typical from −55°C to +125°C.
2.
Factory threshold settings from −45°C to +115°C in 10°C
increments
3.
Supply voltage is 2.7 V to 5.5 V.
4.
Supply current of 30 μA.
5.
Space-saving 5-lead SOT23 package.
6.
Pin selectable temperature hysteresis of 2°C or 10°C.
7.
Temperature resolution of 0.0625°C.


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