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