New SAR ADC Family Enables High-Speed, High-Resolution Analog-to-Digital Conversion in Harsh Environments
The MCP331x1(D)-xx family ranges in resolution from 12-, 14- and 16-bit, with speed options ranging from 500 kilo samples per second (ksps) to 1 Msps, allowing developers to choose the right ADC for their designs.
A fixed low analog supply voltage (AVDD) of 1.8V and low-current operation (1.6 mA typical active current for 1 Msps and 1.4 mA for 500 ksps) enables this 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 using 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.
Properly interfacing a small analog signal to a high-speed, high-resolution ADC without introducing additional noise and distortion is a critical challenge.
The MCP331x1D-XX Evaluation Kit is available to demonstrate the performance of the MCP331x1D-XX SAR ADC family devices. The evaluation kit includes the following:
- MCP331x1D Evaluation Board
- PIC32MZ EF MCU Curiosity Board for data collection
- SAR ADC Utility PC Graphical User Interface (GUI)
- 16-bit resolution
- Differential input
- SPI interface
- ±0.8 LSB Typical DNL
- ±2 LSB Typical INL
- 1 Msps sample rate
- -40 to +125°C temperature range
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