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Multi-channel signal acquisition board

Overview

The onboard MCP1703AT-3302E/CB high-performance 3.3V linear voltage regulator can work when inputting 5V voltage, ensuring the stable and reliable operation of the signal acquisition module.
The onboard LM2776DBVR high-performance switched capacitor inverter generates a standard negative voltage and supplies it to the op amp module, ensuring that the amplifier module is stable and reliable without distortion.
For multiple input signals, two CD4051BM96 analog multiplexers/demultiplexers are installed on the board to call the input signals in a time-sharing manner, ensuring multi-channel acquisition of up to eight signals.
The modulation and transmission of the front-end signal relies on the rear-stage STM32 microcontroller for configuration. The two are directly connected through the DIP-7 bent needle and bent female, realizing the modular construction of the acquisition system.
The control signals of the subsequent stage to this module are only three decoding signals.
The output signal sent to the rear stage by this module includes one channel of 8-selected 1 amplified original signal; and two channels of frequency measurement signals, FRE1 and FRE2.

Design Files

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Update:2025-05-25 07:56:12

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