Features
• Four Synchronous Sampling 24-Bit Resolution
Delta-Sigma A/D Converters
• 93.5 dB SINAD, -107 dBc Total Harmonic
Distortion (THD) (up to 35th Harmonic), 112 dBFS
SFDR for Each Channel
• Enables 0.1% Typical Active Power Measurement
Error Over a 10,000:1 Dynamic Range
• Advanced Security Features:
- 16-Bit Cyclic Redundancy Check (CRC)
Checksum on All Communications for Secure
Data Transfers
- 16-Bit CRC Checksum and Interrupt Alert for
Register Map Configuration
- Register Map Lock with 8-Bit Secure Key
• 2.7V - 3.6V AVDD, DVDD
• Programmable Data Rate Up to 125 ksps:
- 4 MHz Maximum Sampling Frequency
- 16 MHz Maximum Master Clock
• Oversampling Ratio Up to 4096
• Ultra-Low Power Shutdown Mode with < 10 μA
• -122 dB Crosstalk Between Channels
• Low Drift 1.2V Internal Voltage Reference:
9 ppm/°C
• Differential Voltage Reference Input Pins
• High-Gain PGA on Each Channel (up to 32 V/V)
• Phase Delay Compensation with 1 μs Time
Resolution
• 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 Time with Dedicated
16/32-Bit Modes
• Available in 28-Lead QFN and 28-Lead SSOP
Packages
• Extended Temperature Range: -40°C to +125°C

Description
The MCP3912B is a 3V four-channel Analog Front End
(AFE) containing four synchronous sampling Delta-
Sigma Analog-to-Digital Converters (ADC), four PGAs,
phase delay compensation block, low-drift internal voltage
reference, Digital Offset and Gain Error Calibration
registers and high-speed 20 MHz SPI-compatible serial
interface.
The MCP3912B ADCs are fully configurable, with
features, such as 16/24-bit resolution, Oversampling
Ratio (OSR) from 32 to 4096, gain from 1x to 32x,
independent shutdown and Reset, dithering and autozeroing.
The communication is largely simplified with
8-bit commands, including various continuous Read/
Write modes and 16/24/32-bit data formats that can be
accessed by the Direct Memory Access (DMA) of an
8, 16 or 32-bit MCU. A separate Data Ready pin is also
included that can be directly connected to an Interrupt
Request (IRQ) input of an MCU.
The MCP3912B includes advanced security features to
secure the communications and the configuration settings,
such as a CRC-16 checksum on both serial data
outputs and static register map configuration. It also
includes a register map lock through an 8-bit secure key
to stop unwanted WRITE commands from processing.
The MCP3912B is capable of interfacing with a variety
of voltage and current sensors, including shunts, current
transformers, Rogowski coils and Hall effect sensors.

Applications
• Polyphase Energy Meters
• Energy Metering and Power Measurement
• Automotive
• Portable Instrumentation
• Medical and Power Monitoring
• Audio/Voice Recognition