The MCP3901 AFE features high-accuracy, dual 16-/24-bit Delta-Sigma Analog-to-Digital Converters.

Microchip Technology (Chandler, AZ) has announced its next-generation Analog Front End (AFE) for metering applications.  The MCP3901 AFE features high-accuracy, dual 16-/24-bit Delta-Sigma Analog-to-Digital Converters (ADCs) with up to 91 dB Signal to Noise and Distortion (SINAD); internal Programmable Gain Amplifiers (PGAs) and voltage reference; phase-delay compensation; and a modulator output block, enabling more precise measurements than competitive solutions. Additional features include:

• 2 synchronous sampling 16/24-bit resolution Delta-Sigma A/D Converters with proprietary multi-bit architecture.
• 91 dB SINAD, -104 dBc THD (up to 35th harmonic), 109 dB 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 2 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 4.5-5.5V AVDD, 2.7-5.5V DVDD.
• Low Power consumption (14 mW typical at 5V).
• Available in small 20-lead QFN and SSOP packages.
• Industrial Temperature Range -40° to +85°C.

For more information visit www.microchip.com