Description

The MCP3903 is a six-channel Analog Front End (AFE) containing three pairs made out of two synchronous

sampling Delta-Sigma Analog-to-Digital Converters (ADC) with PGA, a phase delay compensation block, internal voltage reference, and high-speed 10 MHz SPI compatible serial interface. The converters contain a proprietary dithering algorithm for reduced idle tones and improved THD.

Features

• Six Synchronous Sampling 16/24-bit Resolution Delta-Sigma A/D Converters with Proprietary

Multi-Bit Architecture

• 91 dB SINAD, -100 dBc Total Harmonic Distortion (THD) (up to 35th harmonic), 102 dB Spurious-free

Dynamic Range (SFDR) for Each Channel

• Programmable Data Rate up to 64 ksps

• Ultra Low-Power Shutdown Mode with <2μA

• -115 dB Crosstalk Between any Two Channels

• Low Drift Internal Voltage Reference: 5 ppm/°C

• Differential Voltage Reference Input Pins

• High Gain PGA on Each Channel (up to 32 V/V)

• Phase Delay Compensation Between Each Pair of Channels with 1μs Time Resolution

• High-Speed Addressable 10 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility

• Independent Analog and Digital Power Supplies 4.5V - 5.5V AVDD, 2.7V - 3.6V DVDD

• Available in Small 28-lead SSOP Package

• Extended Temperature Range: -40°C to +125°C

Applications

• Energy Metering and Power Measurement

• Portable Instrumentation

• Medical and Power Monitoring