LM75BD,112【PDF 1/37 页】IC TEMP SENSOR DIGITAL 8-SOIC

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录41

[1页]2页 3页 4页 5页

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 I

C-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 twos complement data giving a

temperature resolution of 0.125 癈. 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 I

C-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 癈 and hysteresis of 75 癈, so that it can be used as a

stand-alone thermostat with those pre-defined temperature set points.

2. Features and benefits

n Pin-for-pin replacement for industry standard LM75 and LM75A and offers improved

temperature resolution of 0.125 癈 and specification of a single part over power supply

range from 2.8 V to 5.5 V

n I

C-bus interface with up to 8 devices on the same bus

n Power supply range from 2.8 V to 5.5 V

n Temperatures range from -55 ?/SPAN>C to +125 ?/SPAN>C

LM75B

Digital temperature sensor and thermal watchdog

Rev. 5 22 January 2014

Product data sheet

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式