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DS75U+T&R

更新时间： 2024-09-30 12:52:39
品牌 Logo 应用领域
美信 - MAXIM 监控
页数 文件大小 规格书
14页 189K
描述
Digital Thermometer and Thermostat

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DS75U+T&R 数据手册

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DS75  
Digital Thermometer and Thermostat  
www.maxim-ic.com  
FEATURES  
PIN ASSIGNMENT  
ƒ Temperature Measurements Require No  
External Components  
8
VDD  
A0  
SDA  
1
2
3
4
ƒ Measures Temperatures from -55°C to  
+125°C (-67°F to +257°F)  
ƒ ±2°C Accuracy Over a -25°C to +100°C  
Range  
7
6
5
SCL  
O.S.  
GND  
A1  
A2  
ƒ Thermometer Resolution is User-  
Configurable from Nine (Default) to 12 Bits  
(0.5°C to 0.0625°C Resolution)  
ƒ 9-Bit Conversion Time is 150ms (Max)  
ƒ Thermostatic Settings are User-Definable  
ƒ Data is Read/Written Via 2-Wire Serial  
(Interface (SDA and SCL Pins)  
DS75S+ (8-Pin SO — 150mil)  
8
1
2
3
VDD  
A0  
SDA  
SCL  
O.S.  
GND  
7
6
5
A1  
4
A2  
ƒ Multidrop Capability Simplifies Distributed  
Temperature-Sensing Applications  
ƒ Wide Power-Supply Range (+2.7V to  
+5.5V).  
ƒ Pin/software Compatible with the LM75  
ƒ Available in 8-Pin μMAX® and SO  
Packages. See Table 1 for Ordering  
Information  
DS75U+ (μMAX)  
PIN DESCRIPTION  
SDA – Open-Drain Data I/O  
SCL – Clock Input  
GND – Ground  
O.S. – Open-Drain Thermostat Output  
ƒ Applications Include Personal Computers,  
Cellular Base Stations, Office Equipment, or  
Any Thermally Sensitive System  
A0  
A1  
A2  
– Address Input  
– Address Input  
– Address Input  
V DD – Power Supply  
DESCRIPTION  
The DS75 digital thermometer and thermostat provides 9, 10, 11, or 12-bit digital temperature readings  
over a -55°C to +125°C range with ±2°C accuracy over a -25°C to +100°C range. At power-up, the  
DS75 defaults to 9-bit resolution for software compatibility with the LM75. Communication with the  
DS75 is achieved via a simple 2–wire serial interface. Three address pins allow up to eight DS75 devices  
to operate on the same 2–wire bus, which greatly simplifies distributed temperature sensing applications.  
The DS75 thermostat has a dedicated open–drain output (O.S.) and programmable fault tolerance, which  
allows the user to define the number of consecutive error conditions that must occur before O.S is  
activated. There are two thermostatic operating modes that control thermostat operation based on user-  
defined trip-points (TOS and THYST).  
A block diagram of the DS75 is shown in Figure 1 and detailed pin descriptions are given in Table 2.  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
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