Designs for digital thermometers

Data conversion & power solutions yield measurement accuracy, efficiency & small size in optimal digital thermometers

Functional block diagram of a digital thermometer (Courtesy Maxim).

Sunnyvale CA, USA — Maxim’s contribution to the documentation for use of optimum designs for temperature measurement provides a wealth on online help for designers and novices alike in understanding the workings and tradeoffs necessary to produce an optimum, working instrument design.

Their online version of the diagram above is both informative and easy to use. It also is a set of interactive page links that takes visitors to the appropriate design and application pages for in-depth details. That is complimented by several downloadable App Notes such as:

APPLICATION NOTE 4690 Important design considerations for digital thermometers
By: John DiCristina

Abstract: This application note is an introduction to the types of digital thermometers and the basic concept of how thermistors and thermopiles calculate temperature. The use of natural logs versus lookup tables, the trade-offs designers make for faster calculation and accuracy, and the various components needed for a digital thermometer are also discussed.

APPLICATION NOTE 4699 Overview of sensor signal paths
By: Sohail Mirza, Kerry Lacanette, Seckin Ozdamar, Reinhardt Wagner & Youssof Fathi

Abstract: This tutorial explains the sensor signal chain for the most popular sensor transducer types for pressure, temperature, current, light, and proximity sensing. The article introduces the intricacies of selecting a signal path. Example circuits and block diagrams help the reader select an optimal set of parts to meet their design needs.

APPLICATION NOTE??4700 Introduction to medical instruments and growing trend for point-of-care and near-patient testing

Abstract: This tutorial discusses the growing trend of using medical instruments in point-of-care and near-patient settings. Focusing on representative examples (blood gas analyzers and flow cytometers) from the analytical instrument segment, it describes critical design considerations for migrating these medical devices to portable form factors.

For a list of Maxim’s recommended solutions for digital thermometer designs, please go to:

For a complete list of Maxim’s App notes CLICK HERE

Maxim Integrated Products was established in 1983. In 2001, Maxim acquired Dallas Semiconductor. Their products are used in a wide variety of microprocessor-based electronics equipment. A sampling of the applications for their circuits includes consumer electronics, personal computers and peripherals, handheld electronics, wireless and fiber communications, test equipment, instrumentation, video displays, and automotive applications.

Corporate Headquarters
Maxim Integrated Products, Inc.
120 San Gabriel Drive
Sunnyvale, CA 94086 USA

Tel: +1 408-737-7600
Fax: +1 408-737-7194

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