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Description

The MCP3911 is a 2.7V to 3.6V dual channel Analog Front End (AFE) containing two synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), two PGAs, phase delay compensation block, low-drift internal voltage reference, modulator output block, digital offset and gain errors calibration registers and high-speed 20 MHz SPI compatible serial interface.

Features

? Two Synchronous Sampling 16/24-bit Resolution

Delta-Sigma A/D Converters

? 94.5 dB SINAD, -106.5 dBc Total Harmonic

Distortion (THD) (up to 35th harmonic), 111 dB

SFDR for Each Channel

? 2.7V – 3.6V AVDD, DVDD

? Programmable Data Rate up to 125 ksps

- 4 MHz Maximum Sampling Frequency

? Oversampling Ratio up to 4096

? Ultra Low Power Shutdown Mode with <2 μA

? -122 dB Crosstalk between the Two Channels

? Low Drift 1.2V Internal Voltage Reference: 7 ppm/°C

? Differential Voltage Reference Input Pins

? High Gain Programmable Gain Amplifier (PGA)

on Each Channel (up to 32V/V)

? Phase Delay Compensation with 1 μs Time

Resolution

? Separate Modulator Output Pins for Each

Channel

? Separate Data Ready Pin for Easy

Synchronization

? Individual 24-bit Digital Offset and Gain Error

Correction for Each Channel

? High-Speed 20 MHz SPI Interface with Mode 0,0

and 1,1 Compatibility

? Continuous Read/Write Modes for Minimum

Communication

? Low Power Consumption (8.9 mW at 3.3V,

5.6 mW at 3.3V in low-power mode, typical)

? Available in Small 20-lead QFN and SSOP

Packages, Pin-to-pin Compatible with MCP3901

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

Applications

? Energy Metering and Power Measurement

? Automotive

? Portable Instrumentation

? Medical and Power Monitoring

? Audio/Voice Recognition