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935285836118

更新时间： 2024-11-21 20:59:43
品牌 Logo 应用领域
恩智浦 - NXP 输出元件传感器换能器
页数 文件大小 规格书
37页 527K
描述
Serial Switch/Digital Sensor

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935285836118 技术参数

生命周期：ActiveReach Compliance Code：unknown
风险等级：5.66传感器/换能器类型：TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
Base Number Matches：1

935285836118 数据手册

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LM75B  
Digital temperature sensor and thermal watchdog  
Rev. 6.1 — 6 February 2015  
Product data sheet  
1. General description  
The LM75B is a temperature-to-digital converter using an on-chip band gap temperature  
sensor and Sigma-Delta A-to-D conversion technique with an overtemperature detection  
output. The LM75B contains a number of data registers: Configuration register (Conf) to  
store the device settings such as device operation mode, OS operation mode, OS polarity  
and OS fault queue as described in Section 7 “Functional description”; temperature  
register (Temp) to store the digital temp reading, and set-point registers (Tos and Thyst) to  
store programmable overtemperature shutdown and hysteresis limits, that can be  
communicated by a controller via the 2-wire serial I2C-bus interface. The device also  
includes an open-drain output (OS) which becomes active when the temperature exceeds  
the programmed limits. There are three selectable logic address pins so that eight devices  
can be connected on the same bus without address conflict.  
The LM75B can be configured for different operation conditions. It can be set in normal  
mode to periodically monitor the ambient temperature, or in shutdown mode to minimize  
power consumption. The OS output operates in either of two selectable modes:  
OS comparator mode or OS interrupt mode. Its active state can be selected as either  
HIGH or LOW. The fault queue that defines the number of consecutive faults in order to  
activate the OS output is programmable as well as the set-point limits.  
The temperature register always stores an 11-bit two’s complement data giving a  
temperature resolution of 0.125 C. This high temperature resolution is particularly useful  
in applications of measuring precisely the thermal drift or runaway. When the LM75B is  
accessed the conversion in process is not interrupted (that is, the I2C-bus section is totally  
independent of the Sigma-Delta converter section) and accessing the LM75B  
continuously without waiting at least one conversion time between communications will  
not prevent the device from updating the Temp register with a new conversion result. The  
new conversion result will be available immediately after the Temp register is updated.  
The LM75B powers up in the normal operation mode with the OS in comparator mode,  
temperature threshold of 80 C and hysteresis of 75 C, so that it can be used as a  
stand-alone thermostat with those pre-defined temperature set points.  
2. Features and benefits  
Pin-for-pin replacement for industry standard LM75 and LM75A and offers improved  
temperature resolution of 0.125 C and specification of a single part over power supply  
range from 2.8 V to 5.5 V  
I2C-bus interface with up to 8 devices on the same bus  
Power supply range from 2.8 V to 5.5 V  
Temperatures range from 55 C to +125 C  
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