Description
The MCP3911A0-E/SS from Microchip is a high-performance, 2-channel Analog Front End (AFE) that integrates two synchronous sampling 24-bit Delta-Sigma Analog-to-Digital Converters (ADCs). Designed for high-precision energy measurement and industrial sensing, this device features two high-gain Programmable Gain Amplifiers (PGAs), a low-drift internal voltage reference, and a phase delay compensation block. It is capable of interfacing with a wide variety of sensors, including shunts, current transformers, Rogowski coils, and Hall effect sensors.
The MCP3911 offers extensive configurability, including programmable resolution (16/24-bit), oversampling ratios (OSR) from 32 to 4096, and gain settings up to 32x. With a high-speed 20MHz SPI interface, digital offset and gain calibration registers, and ultra-low power consumption modes, this AFE provides a comprehensive and flexible solution for advanced data acquisition and power metering applications.
Key Features
- Dual 24-Bit ADCs: Synchronous sampling for precise multi-channel data acquisition.
- High Accuracy: 94.5dB SINAD and -106.5dBc THD ensure professional-grade signal integrity.
- Flexible Configuration: Programmable resolution (16/24-bit), OSR (32–4096), and gain (1x–32x).
- Phase Delay Compensation: Offers 1µs time resolution for accurate phase alignment.
- Integrated PGA: High-gain PGA on each channel for small signal measurement.
- Power Efficient: Low power consumption (8.9mW typical) with an ultra-low-power shutdown mode (<2µA).
- Low Crosstalk: -122dB isolation between channels for clean signal separation.
- High-Speed Interface: 20MHz SPI interface with Mode 0,0 and 1,1 compatibility.
Applications
- Energy Metering: High-accuracy electricity monitoring and power analysis.
- Industrial Sensing: Compatible with shunts, Rogowski coils, and Hall effect sensors.
- Power Quality Analysis: Monitoring harmonics and phase shifts in power systems.
- Instrumentation: Precision measurement for test and diagnostic equipment.
Package Includes
- 1 x MCP3911A0-E/SS 2-Channel 24-bit Analog Front End (SSOP-20)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device Model | MCP3911A0-E/SS |
| Resolution | 24-bit |
| Channels | 2 Channels |
| Interface | SPI (20MHz) |
| Supply Voltage | 2.7V to 3.6V |
| Number of Pins | 20 Pins (SSOP-20) |
| Operating Temp | -40°C to +125°C |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete timing diagrams, register maps, and electrical characteristics, please refer to the official Microchip MCP3911 datasheet.
