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Implementing MPC57xx SAR ADC

Posted: 16 Jul 2014  Print Version  Bookmark and Share

Keywords:Analogue-to-Digital Converters  ADCs  MCUs  Qorivva  MPC57xx 

Analogue-to-Digital Converters (ADCs) are used in a rapidly increasing number of automotive applications. From simply monitoring DC voltages to supporting radar detection of obstacles in ADAS solutions, ADCs find wide acceptance in automotive Microcontroller Units (MCUs). The Qorivva MPC57xx MCUs on the market today incorporate high performance ADCs supporting up to 84 channels with various combinations of Sigma Delta (SD) ADC, enhanced queued eQADC, and Successive Approximation (SAR) ADC architectures in the same device. In these advanced MCUs, conversions from multiple types of analogue inputs are supported in real time with a minimum of control required by the CPUs inside the MCU.

Depending on the system application requirements, the MPC57xx devices use three different ADC architectures:
 • eQADC (an RSD solution)
 • Successive Approximation Register (SAR)
 • Sigma Delta modulator (SD)

The SAR is available in two speed variants—a 1 MSPS (Mega Samples Per Second) SAR and 400 KSPS (Kilo Samples Per Second) SAR.

View the PDF document for more information.

Originally published by Freescale Semiconductor at www.freescale.com as "MPC57xx SAR ADC Implementation and Use".





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