Product Overview

LM75AIMX/NOPB is an industrial-grade digital temperature sensor launched by Texas Instruments (TI), based on a Sigma-Delta ADC architecture and IC two-wire interface. It adopts an 8-pin SOIC package (model D0008A), featuring a wide temperature measurement range of -55°C to +125°C and high accuracy of ±3°C (full temperature range). As a high-reliability model in the LM75A series, it integrates an over-temperature protection output (O.S.), low-power shutdown mode, and multi-device bus compatibility. No external components are required for independent temperature control, making it widely applicable to communication infrastructure, industrial automation, electronic test equipment, and other scenarios as a core component for system thermal management.

Key Features

• High-Precision Wide-Range Temperature Sensing：9-bit resolution (minimum precision 0.5°C), ±2°C accuracy from -25°C to +100°C, and ±3°C accuracy from -55°C to +125°C, meeting industrial-grade temperature monitoring needs.
• Flexible Thermal Protection：Integrates programmable over-temperature threshold (TOS) and hysteresis temperature (THYST) with default values of 80°C/75°C. Supports both comparator and interrupt trigger modes, with O.S. output configurable for active high/low levels to adapt to different system protection logics.
• Low-Power Design：Typical operating current of 280μA, and shutdown mode current as low as 4μA (3V supply), significantly reducing system power consumption for battery-powered or low-power devices.
• Multi-Device Bus Compatibility：Three address pins (A0-A2) support up to 8 devices sharing the same IC bus, simplifying circuit design for multi-zone temperature monitoring.
• High-Reliability Packaging：8-pin SOIC package (1.27mm pitch) with junction-to-ambient thermal resistance (θJA) of 200°C/W, supporting an industrial operating temperature range of -55°C to +125°C for harsh environments.

Technical Specifications

Typical Applications

• Communication Base Station Thermal Management：Monitors temperatures of power amplifiers (PA) and baseband modules, triggers fan speed adjustment or module derating via O.S. output to avoid signal attenuation or hardware damage caused by high temperatures.
• Industrial PLC Systems：Integrated into I/O modules of programmable logic controllers (PLCs) to real-time monitor CPU and interface chip temperatures. Triggers system interrupts in interrupt mode when temperatures exceed thresholds, ensuring industrial control continuity.
• Electronic Test Equipment：Used in precision instruments such as oscilloscopes and signal generators to monitor temperatures of core chips (e.g., FPGAs, ADCs), preventing measurement accuracy degradation due to temperature drift.

Why Choose LM75AIMX/NOPB ?

• High Integration：No external components required for temperature sensing and thermal protection, reducing PCB area and material costs, and supporting independent temperature control (default 80°C over-temperature protection at power-up).
• Flexible Adaptability：IC interface compatible with 5V/3.3V systems, programmable O.S. mode and polarity, adapting to different main control chips and protection logic designs.
• Industrial-Grade Reliability：Wide operating temperature range and high heat dissipation efficiency of the SOIC package, meeting long-term stable operation requirements in harsh environments such as industrial sites and outdoor equipment.
• Easy Development：Compatible with TI Quartus, Arduino, and other development tools, with comprehensive register configuration documents and application examples to shorten development cycles.
• Multi-Device Expansion：Supports 8 devices sharing a single bus, enabling synchronous temperature monitoring of multiple zones (e.g., power modules, CPUs, interface circuits) and simplifying system wiring.

SUNTOP COMPANY INTRODUCTION

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