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| 型號： | ADT7401RMREEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 4Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MO-187AA, SOIC-8 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大小： | 340K |
| 代理商： | ADT7401RMREEL7 |
SMBus/I2C Compatible, ±0.5°C Accurate 12-Bit
Digital Temperature Sensor with Daisy Chain
Preliminary Technical Data
ADT7401
Rev. PrE
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
12-Bit Temperature-to-Digital Converter
±0.5°C Accuracy at 25°C
±1°C Accuracy from 0°C to +70°C
Operation from -40°C to 150°C
Operation from 2.7V to 5.5V
Power Consumption TBD mW Max at 5.5 V
Power Saving One Shot Mode
Pin Selectable Addressing via AS pin
Sub-SMBus/I2C Bus via DC pin
Small Low Cost 6-Pin SOT-23 Package and 8-Pin
MSOP
APPLICATIONS
Isolated Sensors
Environmental Control Systems
Refrigeration Systems
Thermal Protection
Industrial Process Control
Power System Monitors
Automotive
Medical
GENERAL DESCRIPTION
The ADT7401 is a complete temperature monitoring system
that outputs a 12-bit digital word corresponding to the temp-
erature of the ADT7401’s silicon. The device offers a high
temperature accuracy of ±1°C from 0°C to +70°C, with
excellent transducer linearity. The digital output of the
ADT7401 is SMBus/I2C compatible.
The ADT7401 is specified for operation at supply voltages from
2.7 V to 5.5 V. Operating at 3.3 V the supply current is typically
230 A.
The ADT7401 is rated for operation over the -40°C to +150°C
temperature range. It is packaged in a low cost, low area SOT-23
package and mini-SOIC package. The SMBus ALERT pin is an
open-drain output that is used as an out of limit temperature
indicator. It can be wired-AND with other SMBus ALERT pins
and is used in conjunction with the SMBus General Call
Address.
The DC (Daisy Chain) pin creates a sub-SMBus/I2C bus where
a multiple of ADT7401’s can be used. The DC pin has the
advantage of freeing up the address options on the root bus as
only one ADT7401 root address needs to be used by the
SMBus/I2C controller but still being able to address a number of
ADT7401 temperature sensors.
PRODUCT HIGHLIGHTS
1.
The ADT7401 has an on-chip temperature sensor that
allows an accurate measurement of the ambient
temperature. The measurable temperature range is -40°C
to +150°C.
2.
Supply voltage of 2.7 V to 5.5 V.
3.
Space-saving 6-lead SOT-23 package and 8-lead MSOP.
4.
Temperature accuracy of ±0.5°C.
5.
0.0625°C temperature resolution.
6.
The ADT7401 features a one shot mode that reduces the
power consumption to 2.57 W at one sample per second.
FUNCTIONAL BLOCK DIAGRAM
Figure 1. SOT-23 Functional Block Diagram
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