The ES7243 with Codec ICs QFN-20 RoHS is a digital audio codec integrated circuit manufactured by Everest Semiconductor. It offers reliable, high-quality audio signal processing and digital signal I/O through an integrated 24-bit ADC, 24-bit DAC, headphone amplifier, and microphone amplifier with programmable gain settings. Designed for portable media products, it features low power consumption, USB full-speed and high-speed bus compatibility, and low EMI operation. It also provides a wide range of features such as stereo ADC (analog) input for stereo line-in signals, support for mono/stereo/4-channel voice input, stereo DAC output for stereo line-out, and support for headphone amplifier output for both stereo and mono headsets. Additionally, ES7243 comes with on-chip PLL for stereo synchronization, low-noise design, and features a high signal-to-noise ratio and low THD and passes the RoHS requirements for environmental protection.