AFE General Purpose 2ADC 24-Bit 3.3V 20-Pin SSOP Tube

The MCP3911 is a 2.7V to 3.6V dual channel Analog Front End (AFE) containing two synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), two PGAs, phase delay compensation block, low-drift internal voltage reference, modulator output block, digital offset and gain errors calibration registers, and high-speed 20 MHz SPI compatible serial interface. The MCP3911 ADCs are fully configurable with features such as: 16/24-bit resolution, OSR from 32 to 4096, gain from 1x to 32x, independent shutdown and reset, dithering and auto-zeroing. The communication is largely simplified with the one-byte-long commands including various continuous read/write modes that can be accessed by the Direct Memory Access (DMA) of an MCU, and with a separate data ready pin that can be directly connected to an Interrupt Request (IRQ) input of an MCU. The MCP3911 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors.

• Two Synchronous Sampling 16/24-bit Resolution Delta-Sigma A/D Converters
• 94.5 dB SINAD, -106.5 dBc Total Harmonic Distortion (THD) (up to 35th harmonic), 111 dB SFDR for Each Channel
• 2.7V - 3.6V AVDD, DVDD
• 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
• Low Drift 1.2V Internal Voltage Reference: 7 ppm/°C
• Differential Voltage Reference Input Pins
• High Gain PGA on Each Channel (up to 32V/V)
• Phase Delay Compensation with 1 µs Time Resolution
• 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
• High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility
• Continuous Read/Write Modes for Minimum Communication
• Low Power Consumption (8.9 mW at 3.3V, 5.6 mW at 3.3V in low-power mode, typical)
• Available in Small 20-lead QFN and SSOP Packages, Pin-to-pin Compatible with MCP3901
• Extended Temperature Range: -40°C to +125°C