Wcd9341 Datasheet ★ No Login

The Qualcomm WCD9341 (marketed under the Qualcomm Aqstic brand) is a high-performance audio codec IC integrated into flagship smartphones powered by the Snapdragon 835 and 845 platforms, such as the Samsung Galaxy S8, Note 8, and Xiaomi Mi Note 2.  Key Technical Specifications 

The WCD9341 is designed for high-fidelity (Hi-Fi) audio playback and recording with the following core capabilities: 

High-Resolution Audio: Supports PCM audio up to 384-kHz/32-bit and native DSD (Direct Stream Digital) playback.

Dynamic Range: Delivers a high dynamic range of 123 dB, ensuring detailed sound reproduction.

THD+N Performance: Engineered for extremely low Total Harmonic Distortion plus Noise to provide "pure, premium sound".

Power Efficiency: Optimized for mobile devices to deliver crystal-clear audio with minimal battery impact.  Advanced Features 

Smart Codec Intelligence: Capable of switching between a high-bit rate mode for music and a low-latency mode for gaming.

Voice Processing: Includes integrated technologies for echo cancellation and noise suppression to improve call clarity.

Compatibility: Primarily used in high-end mobile devices and IoT applications requiring professional-grade audio processing.  Common Use Cases & Sourcing 

Repair & Maintenance: It is a frequently replaced component in Samsung Galaxy S8/Note 8 models when audio output fails.

Procurement: Official technical documentation and bulk components are available through industrial distributors like IC-Components or Arrow Electronics.  WCD9341 CSR PLC (Qualcomm) - IC Components wcd9341 datasheet

Overview

The WCD9341 is a low-power, high-fidelity audio codec chip that supports a wide range of audio applications, including smartphones, tablets, laptops, and portable audio devices. It features a high-performance digital-to-analog converter (DAC) and an analog-to-digital converter (ADC) with a high signal-to-noise ratio (SNR).

Key Features

• Audio Codec: The WCD9341 is a complete audio codec solution that includes a DAC, ADC, and analog audio interfaces.
• High-Performance Audio: The chip supports high-fidelity audio playback and recording with a high SNR of 110 dB (DAC) and 95 dB (ADC).
• Low Power Consumption: The WCD9341 is designed for low power consumption, making it suitable for battery-powered devices.
• Flexible Audio Interfaces: The chip supports a range of audio interfaces, including I2S, TDM, and PCM.

Technical Specifications

• DAC Specifications:
  • Resolution: 24-bit
  • Sampling Rates: 8 kHz to 384 kHz
  • SNR: 110 dB
  • Dynamic Range: 110 dB
• ADC Specifications:
  • Resolution: 24-bit
  • Sampling Rates: 8 kHz to 96 kHz
  • SNR: 95 dB
  • Dynamic Range: 95 dB
• Analog Audio Interfaces:
  • Stereo headphone driver
  • Stereo line output
  • Mono speaker driver
  • Stereo line input

Functional Block Diagram

The WCD9341 consists of the following functional blocks:

• Digital Audio Interface: I2S, TDM, and PCM interfaces for digital audio data transfer.
• DAC: High-performance DAC with 24-bit resolution and sampling rates up to 384 kHz.
• Analog Audio Interface: Stereo headphone driver, stereo line output, mono speaker driver, and stereo line input.
• ADC: High-performance ADC with 24-bit resolution and sampling rates up to 96 kHz.
• Power Management: Low-power consumption design with power-down and standby modes.

Applications

The WCD9341 is suitable for a wide range of audio applications, including:

• Smartphones and tablets
• Laptops and portable computers
• Portable audio devices (e.g., MP3 players, headphones)
• Home audio systems
• Automotive audio systems

Package and Pinout

The WCD9341 is available in a small package (e.g., WLCSP) with a compact pinout. The Qualcomm WCD9341 (marketed under the Qualcomm Aqstic

Conclusion

The WCD9341 is a high-performance audio codec chip that offers a range of features and benefits for audio applications. Its high-fidelity audio playback and recording capabilities, low power consumption, and flexible audio interfaces make it an attractive solution for device manufacturers.

If you'd like more information or have specific questions, feel free to ask!

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The WCD9341, part of the Qualcomm Aqstic line, is a high-performance audio codec IC designed primarily for premium mobile devices like the Samsung Galaxy S8, S8 Plus, and Note 8. It is engineered to support high-fidelity (Hi-Fi) audio requirements and modern Voice UI platforms, offering features such as noise reduction and low power consumption in a compact Wafer Level Package (WLP). Technical Overview and Specifications

The WCD9341 is a specialized integrated circuit that acts as the primary audio hub for advanced mobile ecosystems. Detailed technical specifications can be found through professional electronics suppliers and technical documents:

Manufacturer: Primarily manufactured by Qualcomm, often listed under the CSR PLC brand following acquisition.

Package Type: 154-pin Wafer Level Chip Scale Package (WLCSP), designed for high-density mobile PCB layouts.

Audio Support: Optimized for high-definition audio processing, supporting multiple formats and high-fidelity output. Specialized Features:

Noise Reduction: Integrated capabilities for clear voice and audio capture. Audio Codec : The WCD9341 is a complete

Energy Efficiency: Low power consumption profiles to extend mobile battery life.

Connectivity: Robust against interference with high-speed signal processing. Practical Applications and Repair

In the consumer market, the WCD9341 is most recognized for its role in the Samsung Galaxy flagship series.

Device Integration: It is the standard Audio Codec IC for the Samsung Galaxy S8 and Note 8.

Common Repairs: Technicians often seek this chip to resolve "no sound" issues or microphone failures. Reliable replacement parts are available through distributors like Mobspares or Arrow Electronics.

IoT Potential: While primarily for mobile, high-performance codecs like this are increasingly relevant in the IoT space, supported by specialists like Tibbo who focus on integrated controller solutions.

For engineers seeking alternative timing and spread spectrum data, though often confused in search results with the WCD9341, the Renesas 9341 Datasheet covers clock generators which may be used in adjacent system designs.

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Part 1: Key Technical Specifications (Derived from the Datasheet)

While the full WCD9341 datasheet is under strict NDA, leaked reference designs and public FCC filings have revealed the core specifications. If you are designing a PCB, here are the critical numbers you must know.

2. Key Features

• High-Resolution Audio Support: Up to 32-bit/384 kHz PCM playback and native DSD (Direct Stream Digital) support (DSD64, DSD128).
• Multi-Channel Audio: 2-channel stereo DAC with differential outputs, plus multiple ADC inputs for active noise cancellation and beamforming microphones.
• Low Power Consumption: Optimized for portable devices; includes multiple power domains and flexible clocking.
• Integrated DSP: Qualcomm® Hexagonâ„¢ DSP for audio effects (EQ, dynamic range compression, surround virtualization).
• Smart Amplifier Support: Direct interface for Class-D smart power amplifiers (e.g., WSA8815) with real-time speaker protection algorithms.
• Audio Inputs: Up to 4 analog microphones or 8 digital microphones (PDM interface).
• Audio Outputs: Stereo line-out, high-impedance headphone driver (up to 2Vrms), earpiece, and loudspeaker driver.

Digital Signal Processing (DSP)

The chip integrates a low-power DSP (Digital Signal Processor). This allows for offloading audio tasks from the main CPU to save battery life. Common DSP functions include:

• Hardware Equalization (EQ): Adjusting frequency response for different headphones.
• Dynamic Range Control: Preventing distortion at high volumes.

1. Power Sequencing

• Apply VDD_IO before VDD_A and VDD_D.
• Hold RESET_N low until power rails are stable.
• Minimum reset pulse width: 100 µs.

3. Headphone Amplifier

• High-power output: Capable of driving up to 600 Ω headphones (common in "Audiophile Mode")
• Low-output impedance: < 2 Ω
• Integrated charge pump: Provides a true ground output, eliminating the need for DC-blocking capacitors.

6. Register Map & Configuration

The WCD9341 is controlled via I²C (up to 400 kHz) or SLIMbus. Key register groups:

• Power management: Enable/disable internal LDOs, DAC, ADC, and DSP.
• Routing matrix: Connect any input to any output channel.
• Gain controls: ±24 dB for mic preamps, 0 to –96 dB for DAC digital volume.
• Interrupt status: Jack insertion, overcurrent, thermal warning.

A full datasheet (typically 1,000+ pages) includes register addresses, bit definitions, and initialization sequences.

1. Overview

The WCD9341 is a highly integrated, low-power audio codec designed by Qualcomm for use in premium mobile devices, IoT, and automotive infotainment systems. It is commonly paired with Qualcomm Snapdragon mobile platforms (e.g., Snapdragon 820, 821, 835, and 660). The device delivers high-fidelity (Hi-Fi) audio with advanced digital signal processing, supporting both playback and capture with extremely low noise and distortion.