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PDF ADT6502 Data sheet ( Hoja de datos )
| Número de pieza | ADT6502 | |
| Descripción | (ADT6501 - ADT6504) trip point temperature switches available | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADT6502 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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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.
1 page  
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Preliminary Technical Data
ADT6501/ADT6502/ADT6503/ADT6504
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADT6501/
ADT6502
GND 1
GND 2
HYST 3
TOP VIEW
(Not to Scale)
5 TOVER/
TOVER
4 VCC
ADT6503/
ADT6504
GND 1
GND 2
HYST 3
TOP VIEW
(Not to Scale)
5 TUNDER/
TUNDER
4 VCC
Figure 3. ADT6501/ADT6502 Pin Configuration
Figure 4. ADT6503/ADT6504 Pin Configuration
Table 3. Pin Function Descriptions
ADT6501/ADT6502 ADT6503/ADT6504
Pin No.
Pin No.
11
22
33
44
5–
5–
–5
–5
Mnemonic
GND
GND
HYST
VCC
TOVER/
TOVER
TUNDER/
TUNDER
Description
Ground.
Ground.
Hysteresis Input. Connects HYST to GND for +2°C hysteresis or connects to VCC
for +10°C hysteresis.
Supply Input (+2.7 V to +5.5 V).
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.
Open-Drain, Active-Low Output. TUNDER goes low when the temperature of
the part exceeds the factory programmed threshold; must use a pull-up
resistor.
Push-Pull, Active-High Output. TUNDER goes high when the temperature of
the part exceeds the factory programmed threshold.
Rev. PrA | Page 5 of 16
5 Page 
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Preliminary Technical Data
TEMPERATURE MONITORING
The ADT6501/ADT6502/ADT6503/ADT6504 are ideal for
monitoring the thermal environment within electronic
equipment. For example, the surface-mount package accurately
reflects the exact thermal conditions that affect nearby
integrated circuits.
The ADT650x measure and convert the temperature at the
surface of its own semiconductor chip. When the ADT650x are
used to measure the temperature of a nearby heat source, the
thermal impedance between the heat source and the ADT650x
must be as low as possible.
ADT6501/ADT6502/ADT6503/ADT6504
As much as 60% of the heat transferred from the heat source to
the thermal sensor on the ADT650x die is discharged via the
copper tracks, package pins, and bond pads. Of the pins on the
ADT650x, the GND pins transfer most of the heat. Therefore,
to monitor the temperature of a heat source it is recommended
that the thermal resistance between the ADT650x GND pins
and the GND of the heat source is reduced as much as possible.
For example, use the unique properties of the ADT650x to
monitor a high power dissipation microprocessor. The
ADT650x device, in its SOT-23 package, is mounted directly
beneath the microprocessor’s pin grid array (PGA) package.
The ADT650x requires no external characterization.
Rev. PrA | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADT6502.PDF ] | |
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