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DS1631AU/TR Datasheet

  • DS1631AU/TR

  • High-Precision Digital Thermometer and Thermostat

  • 14頁

  • DALLAS   DALLAS

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DS1631/DS1631A/DS1731
High-Precision Digital
Thermometer and Thermostat
www.maxim-ic.com
FEATURES
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
DS1631 and DS1631A Provide
鹵0.5擄C
Accuracy over a 0擄C to +70擄C Range
DS1731 Provides
鹵1擄C
Accuracy over a
-10擄C to +85擄C Range
DS1631A Automatically Begins Taking
Temperature Measurements at Power-Up
Operating Temperature Range: -55擄C to
+125擄C (-67擄F to +257擄F)
Temperature Measurements Require No
External Components
Output Resolution is User-Selectable to 9,
10, 11, or 12 Bits
Wide Power-Supply Range (+2.7V to +5.5V)
Converts Temperature-to-Digital Word in
750ms (max)
Multidrop Capability Simplifies Distributed
Temperature-Sensing Applications
Thermostatic Settings are User-Definable
and Nonvolatile (NV)
Data is Read/Written Through 2-Wire Serial
Interface (SDA and SCL Pins)
All Three Devices are Available in 8-Pin
mSOP
Packages and the DS1631 is Also
Available in a 150mil SO package鈥攕ee
Table 1 for Ordering Information
PIN CONFIGURATIONS
SDA
SCL
T
OUT
GND
1
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
mSOP
(DS1631U, DS1631AU, DS1731U)
SDA
SCL
T
OUT
GND
2
3
4
8
7
6
5
V
DD
A
0
A
1
A
2
SO (150mil)
(DS1631Z)
See Table 2 for Pin Descriptions
APPLICATIONS
摟
摟
摟
摟
Network Routers and Switches
Cellular Base Stations
Portable Products
Any Space-Constrained Thermally Sensitive
Product
DESCRIPTION
The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature
readings over a -55擄C to +125擄C range. The DS1631 and DS1631A thermometer accuracy is
鹵0.5擄C
from 0擄C to +70擄C with 3.0V
攏
V
DD
攏
5.5V, and the DS1731 accuracy is
鹵1擄C
from -10擄C to +85擄C with
3.0V
攏
V
DD
攏
5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip
points (T
H
and T
L
). The T
H
and T
L
registers and thermometer configuration settings are stored in NV
EEPROM so they can be programmed prior to installation. In addition, the DS1631A automatically
begins taking temperature measurements at power-up, which allows it to function as a stand-alone
thermostat. Communication with the DS1631/DS1631A/DS1731 is achieved through a 2-wire serial
interface, and three address pins allow up to eight devices to be multidropped on the same 2-wire bus.
Pin descriptions for the DS1631/DS1631A/DS1731 are provided in Table 2 and user-accessible registers
are summarized in Table 3. A functional diagram is shown in Figure 1.
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