Аналоговый входной блок - AFE MCP3912A1-E/SS

Устройство AFE , 24-битный дельта-сигма АЦП, 2.7В до 3.6В, SSOP-28

The MCP3912A1-E/SS is a 4-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 20MHz 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 autozeroing. 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.

• 93.5dB SINAD, -107dBc Total harmonic distortion (THD) (up to 35th harmonic)
• 112dBFS SFDR for each channel
• Enables 0.1% typical active power measurement error over a 10,000:1 dynamic range
• 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
• Programmable data rate up to 125ksps
• 4MHz Maximum sampling frequency, 16MHz Maximum master clock
• Ultra low-power shutdown mode with <10µA
• -122dB Crosstalk between the two channels

• 9ppm
• °C Low drift 1.2V internal voltage reference
• Differential voltage reference input pins
• High gain PGA on each channel (up to 32V
• V)
• Phase delay compensation with 1µs time resolution
• Separate data ready pin for easy synchronization
• Individual 24-bit Digital offset and gain error correction for each channel
• High-speed 20MHz SPI Interface with mode 0,0 and 1,1 compatibility
• Continuous read
• write modes for minimum communication
• Low power consumption (8.9mW at 3.3V, 5.6mW at 3.3V in low-power mode, typical)

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Измерительное, Авто, Тестирование и Измерение, Медицинское, Считывание и Контрольно-измерительная Аппаратура, Переносные Устройства, Управление Питанием