LM75B

更新时间： 2024-11-23 11:36:47

品牌	Logo	应用领域
恩智浦 - NXP		传感器温度传感器
页数	文件大小	规格书
29页	164K
描述
Digital temperature sensor and thermal watchdog

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数据手册

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LM75B 数据手册

LM75B

Digital temperature sensor and thermal watchdog

Rev. 02 — 9 December 2008

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 2'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 (i.e., 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

I 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

I I²C-bus interface with up to 8 devices on the same bus

I Power supply range from 2.8 V to 5.5 V

I Temperatures range from −55 °C to +125 °C

12 3 4 5 6 7...29

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LM75B_13	TI	获取价格	LM75C Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
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LM75BD	NXP	获取价格	Digital temperature sensor and thermal watchdog
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LM75BD,112	NXP	获取价格	LM75B - Digital temperature sensor and thermal watchdog SOIC 8-Pin
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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

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