The MCP3903 six channel analog front end, ideal for three phase energy measurement, power monitoring, and other applications requiring multiple high accuracy ADCs. The MCP3903 features high accuracy 16/24-bit delta-sigma A/D converters, internal programmable gain amplifiers, an internal voltage reference, and phase-delay compensation with up to 91 dB SINAD. Communication with the MCP3903 is done via the SPI interface enabling control of the PGAs, oversampling ratio for control of the output data rate (up to 64 ksps), resolution, dithering, shutdown and other communication features.

Parameter Name	Value
Measurement Error	91 dB SINAD
Dynamic Range	24-bit resolution
Voltage Reference Drift ppm typ	12
PSRR % typ	-68 dB
Temp. Range (°C)	-40 to 125
Supply Voltage Range (V)	4.5 to 5.5

Features

Six simultaneously sampled 16/24-bit resolution delta-sigma A/D converters

91 dB SINAD, -100 dBc THD, 102 dB SFDR

Programmable data rate up to 64 ksps

Internal voltage reference with low drift of 5 ppm/°C

Internal PGAs on each channel with gain of 32 V/V

Phase delay compensation between channels with 1 µs resolution

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

 

MCP3903 Six Channel Delta Sigma A/D Converter
MCP3903 ADC Evaluation Board for 16-Bit MCUs User's Guide