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DS1631+ Datasheet(PDF) 1 Page - Maxim Integrated Products

Part # DS1631+
Description  High-Precision Digital Thermometer and Thermostat
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1631+ Datasheet(HTML) 1 Page - Maxim Integrated Products

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FEATURES
DS1631 and DS1631A Provide
±0.5°C
Accuracy over a 0°C to +70°C Range
DS1731 Provides
±1°C Accuracy over a
-10°C to +85°C Range
DS1631A Automatically Begins Taking
Temperature Measurements at Power-Up
Operating Temperature Range: -55°C to
+125°C (-67°F to +257°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
μSOP Packages and the DS1631 is Also
Available in a 150mil SO package—see
Table 1 for Ordering Information
PIN CONFIGURATIONS
DESCRIPTION
The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature
readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is
±0.5°C
from 0°C to +70°C with 3.0V
≤ V
DD ≤ 5.5V, and the DS1731 accuracy is ±1°C from -10°C to +85°C with
3.0V
≤ V
DD ≤ 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip
points (TH and TL). The TH and TL 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.
DS1631/DS1631A/DS1731
High-Precision Digital
Thermometer and Thermostat
www.maxim-ic.com
SO (150mil and 208mil)
(DS1631Z+, DS1631S+)
SCL
VDD
A0
A1
A2
GND
TOUT
SDA
6
8
7
5
3
1
2
4
μSOP
(DS1631U+, DS1631AU+,
DS1731U+)
SCL
VDD
A0
A1
A2
GND
TOUT
SDA
6
8
7
5
3
1
2
4
See Table 2 for Pin Descriptions
APPLICATIONS
Network Routers and Switches
Cellular Base Stations
Portable Products
Any Space-Constrained Thermally Sensitive
Product


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