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Analog Devices - (ADT6501 - ADT6504) trip point temperature switches available

Numéro de référence ADT6501
Description (ADT6501 - ADT6504) trip point temperature switches available
Fabricant Analog Devices 
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Preliminary Technical Data
Low Cost, 2.7 V to 5.5 V, Micropower
Temperature Switches in SOT-23
ADT6501/ADT6502/ADT6503/ADT6504
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
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
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
SENSOR
REFERENCE
VCC
4
DECIMATOR
LPF
1-BIT
+
Σ-Δ
1-BIT
DAC
12-BIT
DIGITAL
COMPARATOR
CLK AND
TIMING
GENERATION
FACTORY PRESET
TRIP POINT
REGISTER
2°C/10°C
5 TOVER
12
GND GND
Figure 1.
3
HYST
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.
Rev. PrA
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 that may result from its use. Specifications subject to change without notice. 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.

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