Catalog
24-Bit, 125kSPS, 2-Ch Simultaneous Sample ADC
Key Features
- Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters
- Programmable Data Rate up to 125 ksps- 4 MHz Maximum Sampling Frequency
- Oversampling Ratio up to 4096
- Ultra Low Power Shutdown Mode with <2 µA
- -122 dB Crosstalk between the Two Channels
- Differential Voltage Reference Input Pins
- High Gain PGA on Each Channel (up to 32V/V)
- Separate Modulator Output Pins for Each Channel
- Separate Data Ready Pin for Easy Synchronization
- Individual 24-bit Digital Offset and Gain Error Correction for Each Channel
- Continuous Read/Write Modes for Minimum Communication
- Available in Small 20-lead QFN and SSOP Packages
- Specifications valid down to -45°C operation
- AEC-Q100 Grade 1
Description
AI
The MCP3911 is a 2.7V to 3.6V dual channel Analog Front End (AFE) containing two simultaneous sampling Delta-Sigma Analog-to-Digital Converters (ADC), two PGAs, phase delay compensation block (1 µs resolution), low drift (9ppm/°C) 1.2V internal voltage reference, modulator output block, and high speed 20 MHz SPI compatible serial interface. The MCP3911 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors. It supports a dynamic range of 10000:1.
The MCP391x portfolio of Analog Front Ends feature performance and functionality which makes them appropriate for use in designs targeted to meet the following industry standards for smart metering applications: IEC62053-11, IEC62053-21, IEC62053-22, ANSI C12.20. In such designs, the MCP391x portfolio can be paired with either MCUs/MPUs which are running a metrology engine, or standard (non-Metrology) MCUs/MPUs.
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