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MCP3912 Datasheet(PDF) 1 Page - Microchip Technology |
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MCP3912 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 82 page  2014 Microchip Technology Inc. DS20005348A-page 1 MCP3912 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 MCP3912 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 MCP3912 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 auto- zeroing. 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, and with the separate Data Ready pin that can directly be connected to an Interrupt Request (IRQ) input of an MCU. The MCP3912 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 MCP3912 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 3V Four-Channel Analog Front End |
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