The Complete WCD9341 Datasheet Guide: Architecture, Specs, and Implementation
Three differential ADCs (each 24-bit, 96 kHz max) support:
Hardware-level, low-power voice wake word activation ("Always-on" listening). Hardware Pin Mapping & Interface Signal Protocols wcd9341 datasheet
The codec has Mic Activity Detection (MAD), which allows the device to listen for a voice command or keyword with ultra-low power consumption, enabling "always-on" voice assistant features like "OK Google" without draining the battery.
The Qualcomm WCD9341 is a masterclass in audio engineering, delivering Hi-Fi audio capabilities that rival dedicated audio players. With 384 kHz/32-bit playback, a 130 dB dynamic range, and low-power operation, it remains a relevant and capable solution for systems demanding top-tier audio quality. With 384 kHz/32-bit playback, a 130 dB dynamic
For a full register-level programming guide or timing diagrams, refer to Qualcomm document 80-NL713-XX under NDA. This review is based on public revision 1.4 (2016-08-12) and community-validated measurements.
: Supports "Always-on" voice UI, including voice activation and low-power keyword detection. Connectivity : Integrated support for the interface for digital audio channel access. : Features a configuration commonly found in mobile device repair parts. Typical Applications Flagship Smartphones : Found in the Samsung Galaxy series : Supports "Always-on" voice UI, including voice activation
| Pin Group | Function | Key Pins | |-----------|----------|-----------| | Analog Inputs | MIC Bias, Line-in, Headset Mic | MICBIAS1, MICBIAS2, IN1P/N, IN2P/N | | Analog Outputs | HPH L/R, Line-out, Earpiece | HPH_L, HPH_R, LINEOUT_L/R, EAR_P/N | | Digital Audio | I2S, PCM, TDM | I2S_BCLK, I2S_LRCLK, I2S_DIN, I2S_DOUT | | Control | I2C (Slave) | I2C_SCL, I2C_SDA | | Power | Supply rails | VDD_IO (1.8V), VDD_A (1.8V), VDD_D (0.9V) | | Clock | Master clock | MCLK (19.2 MHz, 24 MHz, or 38.4 MHz) |
Standard Inter-IC Sound and Time Division Multiplexing interfaces for legacy routing or connecting secondary audio peripherals.
The internal LDOs require a minimum load current of 10 mA to maintain regulation. Floating the output is not allowed.
Despite being released in 2018, the WCD9341 remains relevant. The datasheet lists four primary use cases: