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LM75AD

Digital temp sensor, I2C, 0.125C resolution, +/-0.5C accuracy, OS output, SO8, NXP LM75AD

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Manufacturer Part：

LM75AD

Package：

SO-8 (3.9 x 4.9 x 1.75mm)

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Description

Product Overview

The LM75AD from NXP Semiconductors is a digital temperature sensor and thermal watchdog with I2C interface. It provides 11-bit (0.125C) resolution over -55C to +125C with +/-0.5C typical accuracy from -25C to +100C, and includes a programmable over-temperature shutdown output (OS).

Key Specifications

  • Type: Digital Temperature Sensor and Thermal Watchdog
  • Manufacturer: NXP Semiconductors
  • Temperature Range: -55C to +125C
  • Accuracy: +/-0.5C typical (-25C to +100C)
  • Resolution: 0.125C (11-bit)
  • Interface: I2C (up to 400kbit/s)
  • Supply Voltage: 2.8V to 5.5V
  • Supply Current: 1.0mA typical
  • OS Output: Open-drain over-temperature shutdown
  • Address Pins: 3 (A0, A1, A2) for up to 8 devices on bus
  • Package: SO8
  • Pin 1: SDA, Pin 2: SCL, Pin 3: OS, Pin 4: GND
  • Pin 5: A2, Pin 6: A1, Pin 7: A0, Pin 8: V+
  • RoHS: Compliant

Features

  • 11-bit 0.125C resolution for precise temperature measurement
  • +/-0.5C typical accuracy in the -25C to +100C range
  • I2C interface up to 400kbit/s for easy integration
  • Up to 8 devices on a single I2C bus
  • Programmable over-temperature threshold and hysteresis
  • Open-drain OS output for interrupt or thermostat mode
  • Wide 2.8V to 5.5V supply voltage range

Applications

  • System thermal management and monitoring
  • Fan speed control based on temperature
  • PC and server temperature monitoring
  • Industrial process temperature sensing
  • Battery charger temperature protection
  • Smart thermostat and HVAC control

The LM75AD from NXP is a digital temperature sensor with I2C interface, 0.125C resolution, +/-0.5C typical accuracy, and programmable over-temperature shutdown output in an SO8 package.

The LM75A uses an on-chip band gap temperature sensor and Sigma-Delta analog-to-digital converter to digitize the temperature with 11-bit resolution. The digital result is available over the I2C bus. The OS output is a programmable thermostat that asserts when temperature exceeds the Tos threshold and de-asserts when it drops below the Thyst hysteresis level. It can operate in comparator mode (OS follows temperature) or interrupt mode (OS latches until cleared by reading).

Pin Name Function
1 SDA I2C serial data (bidirectional)
2 SCL I2C serial clock input
3 OS Over-temperature shutdown output (open-drain)
4 GND Ground
5 A2 I2C address bit 2
6 A1 I2C address bit 1
7 A0 I2C address bit 0
8 V+ Power supply (2.8V-5.5V)
  • System thermal management and monitoring
  • Fan speed control based on temperature
  • PC and server temperature monitoring
  • Industrial process temperature sensing
  • Battery charger temperature protection
Model Manufacturer Spec1 Spec2
LM75BDP NXP Same function TSSOP-8 package
TMP102AIDRLR TI 12-bit 0.0625C SOT563
ADT75BRMZ ADI 12-bit 0.0625C MSOP-8
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

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5. Local Pickup in Shenzhen

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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