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A Low Power, Precision SAR Analog to Digital Converter for High Temperature Applications
Keywords: High Temperature, Data Acquisition, SAR ADC
A growing number of industries are calling for low power electronics that operate reliably at temperatures of 175°C and higher. Many of these applications require a precision data acquisition signal chain in order to digitize analog data so that it can be collected and processed. Designing circuits that meet these needs can be very challenging, requiring a data converter that can deliver high performance and reliability in these harsh environments. There are currently a very limited number of integrated circuits commercially available that are specified for operation at these temperatures, and no low power precision data converters with sample rates greater than 100kSPS. This paper presents a new 210°C rated precision analog to digital converter capable of sample rates up to 600 kSPS with 16 bit resolution while maintaining low power consumption and packaged in a small form factor. We will explore the converter architecture of this ADC, present initial test results, and show how high reliability is achieved through qualification and advanced packaging techniques.
Jeff Watson, Systems Applications Engineer
Analog Devices
Stevens, PA

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