Description
The MCP3901 is a dual channel Analog Front End (AFE) containing two synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), two PGAs, phase delay compensation block internal voltage reference, modulator output block, and high-speed 20 MHz SPI compatible serial interface. The converters contain a proprietary dithering algorithm for reduced Idle tones and improved THD.
The internal register map contains 24-bit wide ADC data words, a modulator output byte, as well as six writable control registers to program gain, oversampling ratio, phase, resolution, dithering, shutdown, Reset and several communication features.

Features
• Two Synchronous Sampling 16/24-bit Resolution
   Delta-Sigma A/D Converters with Proprietary
   Multi-Bit Architecture
• 91 dB SINAD, -104 dBc Total Harmonic Distortion
   (THD) (up to 35th harmonic), 109 dB Spurious-free
   Dynamic Range (SFDR) for Each Channel
• Programmable Data Rate up to 64 ksps
• Ultra Low-Power Shutdown mode with <2 µA
• -133 dB Crosstalk Between the Two Channels
• Low Drift Internal Voltage Reference: 12 ppm/°C
• Differential Voltage Reference Input Pins
• High Gain PGA on Each Channel (up to 32 V/V)
• Phase Delay Compensation Between the Two
   Channels with 1 µs time Resolution
• Separate Modulator Outputs for Each Channel
• High-Speed, Addressable 20 MHz SPI Interface
   with Mode 0,0 and 1,1 Compatibility
• Independent Analog and Digital Power Supplies:
   4.5V-5.5V AVDD, 2.7V-5.5V DVDD
• Low-Power Consumption: (14 mW typical at 5V)
• Available in Small 20-lead SSOP and QFN
   Packages
• Industrial Temperature Ranges:
   - Industrial: -40°C to +85°C
   - Extended: -40°C to +125°C

Applications
• Energy Metering and Power Measurement
• Automotive
• Portable Instrumentation
• Medical and Power Monitoring