Datasheet > LM75B_V01

LM75B_V01

更新时间： 2024-11-27 02:48:19

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
37页	555K
描述
Digital temperature sensor and thermal watchdog

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LM75B_V01 数据手册

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

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

12 3 4 5 6 7...37

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与LM75B_V01相关器件

型号	品牌	获取价格	描述	数据表
LM75BD	NXP	获取价格	Digital temperature sensor and thermal watchdog
LM75BD	UMW	获取价格	温度感应器
LM75BD,112	NXP	获取价格	LM75B - Digital temperature sensor and thermal watchdog SOIC 8-Pin
LM75BD,118	NXP	获取价格	LM75B - Digital temperature sensor and thermal watchdog SOIC 8-Pin
LM75BDP	NXP	获取价格	Digital temperature sensor and thermal watchdog
LM75BDP	UMW	获取价格	温度感应器
LM75BDP,118	NXP	获取价格	LM75B - Digital temperature sensor and thermal watchdog TSSOP 8-Pin
LM75BDP/DG,118	NXP	获取价格	Digital temperature sensor and thermal watchdog
LM75BGD	NXP	获取价格	Digital temperature sensor and thermal watchdog
LM75BGD,125	NXP	获取价格	LM75B - Digital temperature sensor and thermal watchdog SON 8-Pin

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