Analog-to-digital conversion device and audio device

An audio device, comprising:

• an audio acquisition device and an analog-to-digital conversion device connected to the audio acquisition device;
• wherein the audio acquisition device is configured to output an acquired analog audio signal to the analog-to-digital conversion device;
• the analog-to-digital conversion device comprises a shunt circuit, at least two branches and a programmable logic chip, wherein the at least two branches comprise a first branch and a second branch, the first branch comprises a first gain amplifier and a first analog-to-digital converter connected in cascade, and the second branch comprises a second gain amplifier and a second analog-to-digital converter connected in cascade;
• the shunt circuit is configured to split a received analog signal into two paths of analog signals and output the two paths of analog signals to the first branch and the second branch respectively;
• the first gain amplifier is configured to scale a received analog signal according to a predetermined gain and output the scaled analog signal to the first analog-to-digital converter;
• the second gain amplifier is configured to scale a received analog signal according to a predetermined gain and output the scaled analog signal to the second analog-to-digital converter;
• wherein the predetermined gain of the first gain amplifier is different from the predetermined gain of the second gain amplifier;
• the first analog-to-digital converter or the second analog-to-digital converter is configured to convert a received analog signal after gain processing into a digital signal and output the digital signal to the programmable logic chip;
• and
• the programmable logic chip is configured to:
• adjust amplitudes of digital signals received from the first branch and the second branch, so that a difference between amplitudes of two paths of adjusted digital signals is not greater than a preset value;
• and merge the two paths of adjusted digital signals into one path of digital signal.