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