National Semiconductor LM75 Manuals

This document describes the analysis of pesticide 1,2,3,4,5,6-C6H6Cl6 concentration in seafood samples using Agilent EnviroPrep and gel permeation chromatography (GPC). The EnviroPrep column, filled with a high-resolution macroporous packing material, was selected for separation. The column is made of stainless steel and can be used in any high-pressure liquid chromatography system. The macroporous packing material has a strong and permanent pore structure, providing excellent separation efficiency in non-sample loading-intensive analysis. The small pore size eliminates interference from high molecular weight compounds and maximizes separation efficiency.

The LM75 is a temperature sensor, Delta-Sigma analog-to-digital converter, and digital over-temperature detector with I2C interface. It can be queried for temperature readings and has programmable alarm thresholds and conditions. The LM75 features SOP-8 and Mini SOP-8 (MSOP) packages, low power consumption, and support for up to 8 LM75s connected to a single bus.

LM75 is a chip that integrates temperature sensor, Delta-Sigma analog-to-digital converter and digital over-temperature detector, and is equipped with I2C interface. The host can query the LM75 at any time to read temperature. When the temperature exceeds a programmable limit, the open-drain over-temperature shut-down (O.S.) output becomes active. This pin can operate in either “Comparator” or “Interrupt” mode. The host can program both the temperature alarm threshold (TOS) and the temperature at which the alarm condition goes away (THYST). In addition, the host can read back the con- tents of the LM75’s TOS and THYST registers. Three pins (A0, A1, A2) are available for address selection. The sensor powers up in Comparator mode with default thresholds of 80˚C TOS and 75˚C THYST. The LM75’s 3.0V to 5.5V supply voltage range, low supply current and I2C interface make it ideal for a wide range of applications. These include thermal management and pro- tection applications in personal computers, electronic test equipment, and office electronics.