Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers The WM8956 is a low-power, high-performance stereo CODEC manufactured by Wolfson Microelectronics. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Audio Resolution:** 24-bit
- **Sampling Rates:** 8 kHz to 96 kHz
- **Signal-to-Noise Ratio (SNR):** 98 dB (DAC), 95 dB (ADC)
- **Total Harmonic Distortion + Noise (THD+N):** -86 dB (DAC), -80 dB (ADC)
- **Power Supply:** 1.8V to 3.6V (digital), 1.8V to 3.6V (analog)
- **Power Consumption:**
- Playback: 13 mW (1.8V supply, 48 kHz)
- Record: 14 mW (1.8V supply, 48 kHz)
- Standby: < 1 µA
### **Descriptions:**
- The WM8956 is a **stereo audio CODEC** designed for portable applications, featuring **low power consumption** and high-quality audio performance.
- It integrates **digital signal processing (DSP)** for enhanced audio effects and filtering.
- Supports **multiple digital audio interfaces**, including I2S, left-justified, right-justified, and DSP modes.
- Includes **on-chip headphone and speaker drivers** with programmable gain.
### **Features:**
- **Stereo DAC and ADC** with 24-bit resolution.
- **Programmable Digital Filters** for bass, treble, and EQ adjustments.
- **On-Chip PLL** for flexible clock generation.
- **Low-Power Modes** for battery-powered devices.
- **Automatic Level Control (ALC)** for microphone input.
- **Software-Controlled Volume** for both playback and recording.
- **I2C/SPI Control Interface** for easy configuration.
- **Pop and Click Suppression** to minimize unwanted noise during power transitions.
The WM8956 is commonly used in **smartphones, tablets, portable media players, and other battery-operated audio devices**.
(Note: Wolfson Microelectronics was acquired by Cirrus Logic in 2014, but the WM8956 remains a Wolfson-branded product.)
