ADT6501 Analog Devices, Inc., ADT6501 Datasheet

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ADT6501

Manufacturer Part Number
ADT6501
Description
Low Cost, 2.7 V To 5.5 V, Micropower Temperature Switches In Sot-23
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
±0.5°C (typical) accuracy from −45°C to +115°C
Factory set trip points from 35°C to 115°C in 10°C increments
No external components required
Maximum temperature of 125°C
Open-drain output (ADT6501)
Push-pull output (ADT6502)
Pin-selectable hysteresis of 2°C or 10°C
Supply current of 30 μA (typical)
Space-saving, 5-lead SOT-23 package
APPLICATIONS
Medical equipment
Automotive
Cell phones
Hard disk drives
Personal computers
Electronic test equipment
Domestic appliances
Process controls
GENERAL DESCRIPTION
The ADT6501/ADT6502 are trip point temperature switches
available in a 5-lead SOT-23 package. Each part 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 logic output is
active low and open-drain. The ADT6502 logic output is active
high and push-pull. The temperature is digitized to a resolution
of 0.125°C (11 bit). The factory trip point settings are 10°C
apart starting from 35°C to 115°C
These devices require no external components and typically
consume 30 μA 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.
The ADT6501/ADT6502 are used for monitoring temperatures
from 35°C to 115°C only. Therefore, the logic output pin
becomes active when the temperature goes higher than the
selected trip point temperature.
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 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.
Trademarks and registered trademarks are the property of their respective owners.
Low Cost, 2.7 V to 5.5 V, Micropower
Temperature Switches in SOT-23
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
Σ-Δ based temperature measurement gives high accuracy
and noise immunity.
Wide operating temperature range from −55°C to +125°C.
±0.5°C typical accuracy from −45°C to +115°C.
Factory threshold settings from 35°C to 115°C in 10°C
increments.
Supply voltage is 2.7 V to 5.5 V.
Supply current of 30 μA.
Space-saving, 5-lead SOT-23 package.
Pin-selectable temperature hysteresis of 2°C or 10°C.
Temperature resolution of 0.125°C.
DIGITAL CONVERTER
TEMPERATURE TO
FACTORY PRESET
GND
FUNCTIONAL BLOCK DIAGRAM
TRIP POINT
REGISTER
1
Σ-Δ
V
CC
4
GND
2
©2007 Analog Devices, Inc. All rights reserved.
ADT6501/ADT6502
Figure 1.
COMPARATOR
HYST
3
2ºC/10ºC
ADT6501
www.analog.com
5
TOVER

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ADT6501 Summary of contents

Page 1

... When the temperature crosses the trip point setting, the logic output is activated. The ADT6501 logic output is active low and open-drain. The ADT6502 logic output is active high and push-pull. The temperature is digitized to a resolution of 0.125° ...

Page 2

... ADT6501/ADT6502 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ........................................................................ 8 REVISION HISTORY 9/07—Revision 0: Initial Version Circuit Information.......................................................................8 Converter Details ..........................................................................8 Factory-Programmed Threshold Range ....................................8 Hysteresis Input ...

Page 3

... ADC Resolution Temperature Conversion Time Update Rate Temperature Threshold Hysteresis DIGITAL INPUT (HYST) Input Low Voltage Input High Voltage DIGITAL OUTPUT (OPEN-DRAIN), ADT6501 Output High Current Output Low Voltage Output Capacitance, C OUT DIGITAL OUTPUT (PUSH-PULL), ADT6502 Output Low Voltage, V ...

Page 4

... ADT6501/ADT6502 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter V to GND CC HYST Input Voltage to GND Open-Drain Output Voltage to GND Push-Pull Output Voltage to GND Input Current on All Pins Output Current on All Pins Operating Temperature Range Storage Temperature Range Maximum Junction Temperature, T JMAX 5-Lead SOT-23 (RJ-5) 1 Power Dissipation ...

Page 5

... Open-Drain, Active-Low Output. TOVER goes low when the temperature of the part exceeds the factory-programmed threshold; must use a pull-up resistor. Push-Pull, Active-High Output. TOVER goes high when the temperature of the part exceeds the factory-programmed threshold. Rev Page ADT6501/ADT6502 for 10°C hysteresis. CC ...

Page 6

... ADT6501/ADT6502 TYPICAL PERFORMANCE CHARACTERISTICS –0.5 –0.4 –0.3 –0.2 –0.1 0.1 ACCURACY (°C) Figure 4. Trip Threshold Accuracy 180 160 140 120 100 –55 – TEMPERATURE (°C) Figure 5. ADT6502 Output Source Resistance vs. Temperature 120 100 ...

Page 7

... TOVER 2 CH1 2.0V CH2 2.0V M10µs 50.0MS/s 20.0ns/pt Figure 10. ADT6501 Start-Up and Power-Down –45 –25 – TEMPERATURE (°C) Figure 11. Hysteresis vs. Trip Temperature CH1 1.68V CH1 3. 2°C 10° 115 2.4 Figure 13. Operating Supply Current vs. Voltage Over Temperature Rev ...

Page 8

... The output trip pin is activated if the temperature measured is greater than the factory set trip level. Overall accuracy for the ADT6501/ADT6502 is ±6°C (maximum) from −45°C to +115°C. The on-board temperature sensor has excellent accuracy and linearity over the entire rated temperature range ...

Page 9

... ADT6501/ADT6502 die is discharged via the copper tracks, package pins, and bond pads. Of all the pins on the ADT6501/ADT6502, the GND pins transfer most of the heat. Therefore, to monitor the temperature of a heat source recommended that the thermal resistance between the ADT6501/ADT6502 GND pins and the GND of the heat source be reduced as much as possible ...

Page 10

... V CC ADT6501 TOVER INT GND HYST GND Figure 17. Microprocessor Alarm V CC MICROPROCESSOR GND 3.3V 0.1µF 100kΩ ADT6501 ... P075 TOVER GND HYST GND 0.1µ ADT6502 ... P045 TOVER GND HYST GND Figure 19. Fail Safe Temperature Monitor Rev Page 3.3V 12V 0.1µ ...

Page 11

... Model Temperature 1 ADT6501SRJZP035RL7 35°C 1 ADT6501SRJZP045RL7 45°C 1 ADT6501SRJZP055RL7 55°C 1 ADT6501SRJZP065RL7 65°C ADT6501SRJZP075RL7 1 75°C 1 ADT6501SRJZP085RL7 85°C 1 ADT6501SRJZP085-RL 85°C 1 ADT6501SRJZP095RL7 95°C 1 ADT6501SRJZP105RL7 105°C 1 ADT6501SRJZP105-RL 105°C 1 ADT6501SRJZP115RL7 115°C 1 ADT6502SRJZP035RL7 35°C 1 ADT6502SRJZP045RL7 45°C 1 ADT6502SRJZP055RL7 55°C 1 ADT6502SRJZP065RL7 65°C 1 ADT6502SRJZP075RL7 75°C 1 ADT6502SRJZP085RL7 85°C ADT6502SRJZP095RL7 1 95° ...

Page 12

... ADT6501/ADT6502 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06096-0-9/07(0) Rev Page ...

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