An analog-to-digital converter is a device that converts an analog signal into a digital signal, allowing it to be processed by electronic devices. The provided specification refers to a specific type of analog-to-digital converter with the following characteristics: - Bit depth: 24 bits - Type: Sigma-Delta (a method of converting analog signals to digital) - Number of inputs: 2 - Package: 16-VQFN, measuring 4mm x 4mm.