The XD231 is an analog to digital converter (ADC) integrated circuit, DIP-8 package, manufactured by XINLUDA. It has 10-bit resolution and covers a dynamic range of 0-5V to 0-10V, with a sampling rate of up to 4KHz. It is RoHS Compliant, meaning it does not contain any hazardous substances, and is easy to connect to and operate. It has two input/output pins, D- and D+, for communication with other components. It also has an enable (E) pin, which can be used to enable or disable the device. The XD231 also has an integrated voltage reference, temperature sensor, and programmable gain amplifier (PGA). It is a low power device, with a current draw of up to 100uA.