參數(shù)資料
型號: LM75BD,112
廠商: NXP Semiconductors
文件頁數(shù): 1/37頁
文件大?。?/td> 520K
描述: IC TEMP SENSOR DIGITAL 8-SOIC
特色產(chǎn)品: Digital Temperature Sensor / Thermal Watchdog
標(biāo)準(zhǔn)包裝: 100
功能: 溫度監(jiān)視系統(tǒng)(傳感器),監(jiān)視器
傳感器類型: 內(nèi)部
感應(yīng)溫度: -55°C ~ 125°C
精確度: ±3°C(最小值)
拓?fù)洌?/td> ADC(三角積分型),比較器,振蕩器,寄存器庫
輸出類型: 2 線串行,I²C?
輸出警報:
輸出風(fēng)扇:
電源電壓: 2.8 V ~ 5.5 V
工作溫度: -55°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SO
包裝: 管件
其它名稱: 935285837112
LM75BD
LM75BD-ND
 
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 I
2
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
2
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
2
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
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