LM75AIM

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With LM75AIM, users can easily monitor temperature readings digitally

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LM75AIM 數據表

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詳細說明

The LM75A is a temperature-to-digital converter using an on-chip band gap temperaturesensor and Sigma-delta A-to-D conversion technique. The device is also a thermaldetector providing an overtemperature detection output. The LM75A contains a number of data registers: Configuration register (Conf) to store the device settings such as deviceoperation mode, OS operation mode, OS polarity and OS fault queue as described inSection 7 “Functional description”; temperature register (Temp) to store the digital tempreading, and set-point registers (Tos and Thyst) to store programmable overtemperatureshutdown and hysteresis limits, that can be communicated by a controller via the 2-wireserial I2C-bus interface. The device also includes an open-drain output (OS) whichbecomes active when the temperature exceeds the programmed limits. There are threeselectable logic address pins so that eight devices can be connected on the same buswithout address conflict.The LM75A can be configured for different operation conditions. It can be set in normalmode to periodically monitor the ambient temperature, or in shutdown mode to minimizepower 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 eitherHIGH or LOW. The fault queue that defines the number of consecutive faults in order toactivate the OS output is programmable as well as the set-point limits.Features■ Pin-for-pin replacement for industry standard LM75 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■ Small 8-pin package types: SO8 and TSSOP8■ 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■ 11-bit ADC that offers a temperature resolution of 0.125 °C■ Temperature accuracy of: ♦ ±2 °C from −25 °C to +100 °C ♦ ±3 °C from −55 °C to +125 °C■ Programmable temperature threshold and hysteresis set points■ Supply current of 3.5 µA in shutdown mode for power conservation■ Stand-alone operation as thermostat at power-up■ ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mAApplications■ System thermal management■ Personal computers■ Electronics equipment■ Industrial controllers

主要特徵

  • Pin-for-pin replacement for industry standard LM75 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
  • Small 8-pin package types: SO8 and TSSOP8
  • 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
  • 11-bit ADC that offers a temperature resolution of 0.125 °C
  • Temperature accuracy of:
  • ♦ ±2 °C from −25 °C to +100 °C
  • ♦ ±3 °C from −55 °C to +125 °C
  • Programmable temperature threshold and hysteresis set points
  • Supply current of 3.5 µA in shutdown mode for power conservation
  • Stand-alone operation as thermostat at power-up
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

規格

以下是所選零件的基本參數,涉及零件的特性及其所屬類別。

Product Category ! Board Mount Temperature Sensors Output Type Digital
Interface Type 2-Wire, I2C, SMBus Brand Texas Instruments
Product Temperature Sensors Product Type ! Temperature Sensor ICs
Subcategory Sensors

數據表 PDF

數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。

初步規格 LM75AIM PDF 下載

常見問題解答

What is LM75AIM?

The LM75AIM is a digital temperature sensor and thermal watchdog designed by Texas Instruments. It provides accurate temperature measurements and temperature-based system control for a wide range of applications, including industrial automation, consumer electronics, and automotive systems.

How Does LM75AIM Work?

The LM75AIM works by sensing the temperature of the surrounding environment and converting it into a digital value. It communicates the temperature data to a microcontroller or other digital system through a standard I2C interface. The sensor also includes programmable temperature thresholds for implementing system protection and control based on temperature conditions.

How Many Pins does LM75AIM have and What are the Functions of the Pinout Configuration?

The LM75AIM is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

  • VDD: Power supply pin.
  • GND: Ground pin.
  • SCL: Serial clock input for I2C communication.
  • SDA: Serial data input/output for I2C communication.
  • OS: Overtemperature shutdown output.
  • A0, A1, A2: Address input pins for I2C address selection.

What are the Pros and Cons of LM75AIM?

Pros:

  • High Accuracy: Provides accurate digital temperature readings for precise temperature monitoring.
  • I2C Interface: Allows easy integration with microcontrollers and digital systems.
  • Programmable Temperature Thresholds: Enables temperature-based system protection and control.
  • Low Power Consumption: Operates with low power, suitable for battery-powered applications.
  • Compact Package: The 8-pin SOIC package is space-efficient, suitable for compact designs.

Cons:

  • Limited Temperature Range: May not be suitable for extreme temperature measurement applications.
  • Resolution: The LM75AIM has a fixed 0.5°C resolution, which may not meet the requirements of high-precision temperature measurement applications.
  • External Components: May require additional components such as pull-up resistors for I2C communication.

Are There Any Equivalents/Alternatives to LM75AIM for Recommendation?

  • The TMP75 from Texas Instruments is a similar digital temperature sensor with enhanced features.
  • Alternatives to the LM75AIM include the DS1631 from Maxim Integrated and the MCP9800 from Microchip Technology.

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