The **ES8396** is a high-performance, low-power **Stereo Audio Codec** (Coder-Decoder) manufactured by **Everest Semiconductor**. It is specifically designed for mobile devices, tablets, and portable audio systems where power efficiency and audio quality are critical. --- ### 1. General Specifications The ES8396 combines high-resolution Analog-to-Digital (ADC) and Digital-to-Analog (DAC) converters with integrated headphone drivers and microphone amplifiers. | Feature | Specification | | :--- | :--- | | **Channels** | 2-Channel ADC, 2-Channel DAC | | **Resolution** | Up to 24-bit | | **Sampling Rate** | 8 kHz to 96 kHz | | **Signal-to-Noise Ratio (SNR)** | ~95 dB to 100 dB (typical) | | **Control Interface** | I2C (Standard Mode/Fast Mode) | | **Audio Interface** | I2S, Left Justified, Right Justified, DSP/PCM | --- ### 2. Key Internal Components The chip is highly integrated, reducing the need for external passive components. #### A. Analog-to-Digital Converter (ADC) * **Multi-bit Delta-Sigma architecture.** * **Programmable Gain Amplifier (PGA):** Allows for boosting weak signals from microphones. * **ALC (Automatic Level Control):** Prevents audio clipping by managing input gain dynamically. #### B. Digital-to-Analog Converter (DAC) * **Low Power Consumption:** Optimized for battery-operated devices. * **Digital Volume Control:** Supports precise attenuation and muting. * **De-emphasis Filters:** Supports standard sampling rates (32kHz, 44.1kHz, 48kHz). #### C. Analog Input/Output * **Microphone Bias:** Integrated voltage supply for electret microphones. * **Headphone Driver:** Ground-referenced (Capless) outputs are common in this series, reducing PCB space by removing large DC-blocking capacitors. --- ### 3. Application Circuit Block Diagram In a typical electronic design, the ES8396 acts as the bridge between the digital processor and the analog audio world. ```mermaid graph LR CPU[Application Processor/SoC] -- I2S/I2C --> ES8396 ES8396 -- Analog Out --> HP[Headphones/Speakers] Mic[Microphone] -- Analog In --> ES8396 ``` --- ### 4. Common Use Cases * **Smartphones & Tablets:** Main audio processing unit. * **Bluetooth Headphones:** Used alongside a BT SoC for high-quality decoding. * **Portable Media Players:** For high-fidelity playback. * **Voice Recording Devices:** Leveraging the integrated PGA and ALC. ---