STLM75

数字式温度传感器和热看门狗

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中文资料及数据手册

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产品信息

The STLM75 is a high-precision digital CMOS temperature sensor IC with a sigma-delta temperature-to-digital converter and an I2C-compatible serial digital interface. It is targeted for general applications such as personal computers, system thermal management, electronics equipment, and industrial controllers, and is packaged in the industry standard 8-lead TSSOP and SO8 packages.

The device contains a band gap temperature sensor and 9-bit ADC which monitor and digitize the temperature to a resolution up to 0.5 °C. The STLM75 is typically accurate to (±3 °C - max) over the full temperature measurement range of –55 °C to 125 °C with ±2 °C accuracy in the –25 °C to +100 °C range. The STLM75 is pin-for-pin and software compatible with the LM75B.

The STLM75 is specified for operating at supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the supply current is typically (125 μA).

The on-board sigma-delta analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in degrees centigrade; for Fahrenheit applications a lookup table or conversion routine is required.

The STLM75 is factory-calibrated and requires no external components to measure temperature.

stlm75是一个高精度的数字CMOS温度传感器IC采用∑-Δ温度数字转换器和一个I2C兼容串行数字接口。这是针对一般的应用,如个人电脑、热管理系统、电子设备、工业控制器,并在包装行业标准的8引脚TSSOP和SO8封装

该器件包含一个带隙温度传感器和9位ADC监测和数字化的温度分辨率高达0.5°C. stlm75通常是准确的(±3°C max)在–55°C全温度测量范围为125°C 2 C±°精度在–25°C + 100°C系列。是的stlm75引脚对引脚和软件兼容的lm75b。

stlm75是操作电源电压从2.7 V到5.5 V操作在3.3 V的电源电流通常是指定的,(125μ一)

车载Sigma-Delta模数转换器(ADC)转换为数字值,测量的温度是摄氏度校准;为华氏应用查找表或转换程序是必需的。

stlm75是工厂校准,不需要外部元件来测量温度。

Key Features

  • Measures temperatures from –55°C to +125°C (–67°F to +257°F)

  • ±0.5°C (typ) accuracy

  • ±2°C (max) accuracy from –25°C to +100°C

  • Low operating current: 125 μA (typ)

  • No external components required

  • 2-wire I2C/SMBus-compatible serial interface

  • Supports bus time-out feature

  • Selectable bus address allows connection of up to eight devices on the bus

  • Wide power supply range-operating voltage range: 2.7 V to 5.5 V

  • Conversion time is 150 ms (max)

  • Programmable temperature threshold and hysteresis set points

  • Pin- and software-compatible with LM75 (drop-in replacement)

  • Power-up defaults permit standalone operation as a thermostat

  • Shutdown mode to minimize power consumption

  • Output pin (open drain) can be configured for interrupt or comparator/thermostat mode (dual purpose event pin)

  • Packages:

  • SO8

  • MSOP8 (TSSOP8)

主要特点

测量温度从55°到125°(67°f)

±0.5°C(典型值)的精度

±2°C(最大)精度由- 25°为±100°

低工作电流:125μ一(典型值

无需外部元件

2线I2C和SMBus兼容串行接口

支持总线超时功能

可选总线地址允许连接多达八个设备在总线上

电源电压范围:2.7伏至5.5伏

转换时间为150毫秒(最大)

可编程温度阈值和滞后集点

引脚和软件兼容(下降LM75更换)

电源默认允许独立运行作为一个温控器

关机模式,以尽量减少电力消耗

输出引脚(开漏)可以配置为中断或比较器/温控器模式(双目的事件引脚)

包装:

SO8封装

MSOP8(采用TSSOP8)


电路图、引脚图和封装图

    STLM75电路图

      STLM75引脚图

        STLM75封装图

        技术资料

        应用案例