New SAR ADC family enables high-speed, high-resolution analogue-to-digital conversion in harsh environments

March 6, 2019 | 13:30
Image: Microchip
Image: Microchip
Key Facts:
  • Family includes the industry’s only 1 Msps fully AEC-Q100-qualified 16-bit SAR
  • 12 devices designed to operate in high temperatures and electromagnetic environments
  • Companion differential amplifier supports ADC with low-distortion, high-accuracy interface
  • Combines ultra-low power consumption with 1.7V to 5.5V digital I/O interface voltage range

Microchip announces 12 new Successive Approximation Register (SAR) Analogue-to-Digital Converters (ADCs) together with a companion differential amplifier designed specifically for the new portfolio of SAR ADCs. Designed to operate in high temperatures and high electromagnetic environments, the MCP331x1(D)-xx family includes the industry’s only one million samples per second (Msps) fully AEC-Q100-qualified 16-bit SAR, providing the reliability required for automotive and industrial applications. The MCP6D11 differential amplifier provides a low-distortion, high-accuracy interface to achieve the full performance of the ADC within systems.

The MCP331x1(D)-xx family ranges in resolution from 12-, 14- and 16-bit, with speed options ranging from 500 kilosamples per second (ksps) to 1 Msps, allowing developers to choose the right ADC for their designs. A fixed low analogue supply voltage (AVDD) of 1.8V and low-current operation of 1.6 mA typical active current for 1 Msps, and 1.4 mA for 500 ksps, enable the family of ADCs to have an ultra-low power consumption, while maintaining a wide input full-scale range. 

These devices support a wide digital I/O interface voltage (DVIO) range (1.7V - 5.5V) which allows it to interface with most host devices, including Microchip’s PIC32, AVR® and Arm®-based microcontrollers and microprocessors. This eliminates the need for external voltage level shifters. The MCP331x1(D)-xx family contains both single-ended and differential input voltage measurement options, enabling systems to convert the difference between any two arbitrary waveforms. Ideal for applications such as high-precision data acquisition, electric vehicle battery management, motor control and switch-mode power supplies, the AEC-Q100-qualified family provides reliable performance across harsh environments.  
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