SB040232025 – DIGITAL TEMP SENSOR SCHEMATIC BLOCK

This schematic block features the LM75BDP,118, a digital temperature-to-I²C converter with built-in thermal watchdog functionality. The device integrates a band-gap temperature sensor with a sigma-delta ADC, enabling precise digital temperature readings over a wide operating range.

Packaged in an 8-pin TSSOP, this breakout-style module exposes the I²C interface, overtemperature (OS) pin, and power rails, making it straightforward to prototype or integrate into embedded systems. It supports fully flexible threshold and hysteresis configuration for overtemperature detection, making it useful for both real-time monitoring and safety shutdowns.

The LM75B family is commonly used in thermal management, industrial control, and systems that require both temperature sensing and a reliable hardware-based thermal alarm.

Key Features:

• I²C (two-wire) digital interface, with up to 8 devices per bus
• Supply voltage: 2.8 V – 5.5 V
• Operating temperature range: –55°C to +125°C
• 11-bit sigma-delta ADC resolution → 0.125°C per step
• Temperature accuracy: ±2°C (‑25°C to +100°C), ±3°C (–55°C to +125°C)
• Programmable overtemperature threshold (Tₒₛ) and hysteresis (Tₕᵧₛ)
• Open-drain OS (overtemperature) output for thermal warning / shutdown
• Low-power shutdown mode (very low current draw)
• Reliable ESD protection and robust package

Typical Applications:

• System thermal management (servers, PCs, embedded systems)
• Industrial controllers and automation equipment
• Power-supply temperature monitoring
• Battery- or power-management systems
• Safety-critical applications that need overtemperature detection
• Thermostat / thermal-limiting circuits in electronics

By integrating this Quickboards schematic block, engineers can accelerate development of temperature monitoring systems, reduce analog complexity, and leverage a proven, compact digital sensor with integrated thermal protection.