Wcd9341 Datasheet Jun 2026
A Class-H stereo headphone amplifier dynamically adjusts its internal supply rails based on the audio signal amplitude, drastically reducing power consumption.
In a standard smartphone implementation, the WCD9341 acts as a slave peripheral commanded by the primary SoC.
| Supply Rail | Description | | :--- | :--- | | vdd-buck-supply | 1.8V supply for internal buck regulator | | vdd-rx-supply | 1.8V supply for receive analog circuits | | vdd-tx-supply | 1.8V supply for transmit analog circuits | | vdd-io-supply | 1.8V supply for digital I/O | | vdd-micbias-supply | Supply for microphone bias generation | wcd9341 datasheet
If you want, I can:
Primary power rails. The datasheet mandates a decoupled capacitor network on these pins to eliminate high-frequency power supply noise. A Class-H stereo headphone amplifier dynamically adjusts its
Open-source wcd934x driver files contain complete register definitions and power-sequencing steps.
: Features a High-Fidelity DAC with a dynamic range typically exceeding The datasheet mandates a decoupled capacitor network on
For edge AI and smart assistants, the WCD9341 hosts a programmable digital signal processor (DSP). This DSP offloads critical voice tasks from the primary application processor: Multi-microphone beamforming and far-field pickup. Echo Cancellation and Noise Suppression (ECNS).
| Address | Name | Function | |---------|------|----------| | 0x01 | CDC_CLK_RST_CTRL | Master clock divider (1–64) | | 0x12 | DAC_PATH_CTRL | DAC enable, DSD/PCM mode | | 0x23 | HPH_GAIN_CTRL | 0 to +6 dB (1 dB steps) | | 0x34 | ADC_GAIN_CTRL | –12 to +30 dB (0.5 dB steps) | | 0x5A | DSD_CONFIG | DSD filter bandwidth (50/100/200 kHz) | | 0x78 | CLASSH_CONFIG | Class-H attack/release time (0.5–8 ms) |
If you are searching for the , you are likely an audio engineer, smartphone repair specialist, or an embedded systems developer looking to understand the specifications, pinouts, and capabilities of this powerful chip. This article serves as a deep-dive analysis of the WCD9341, covering its key features, electrical characteristics, architectural overview, and practical usage considerations—distilling the essence of what a formal datasheet provides.
Due to the high fidelity of the WCD9341, layout engineers must strictly adhere to best practices for mixed-signal PCB design to avoid degradation of audio performance.