Wcd9341 Datasheet

When working with the WCD9341, engineers have reported:

  • Audio performance:
  • Digital interfaces and formats:
  • On-chip processing/features:
  • Clocks and timing:
  • Analog characteristics and filtering:
  • Thermal and reliability:
  • Test conditions and measurement setups (to interpret THD/SNR numbers)

    • From the datasheet’s functional block diagram:

    Analog Inputs ──┬── ADC0 (Main Mic)
                ├── ADC1 (Secondary Mic)  
                ├── ADC2 (ANC/Reference)
                └── ADC3 (Line-in/Headset detect)

                     ↓
             Digital Decimation Filters
                 ↓
          ┌─────────────────────────┐
          │  Audio DSP (Qualcomm Hexagon, 240 MHz) │
          │  - FIR/IIR filters      │
          │  - Dynamic Range Control │
          │  - Sample rate converter │
          └─────────────────────────┘
                 ↓
          ┌─────────────────────────┐
          │   Hi-Fi DAC (32-bit, 384 kHz)  │
          │   - DSD direct path     │
          │   - 4th-order noise shaping   │
          └─────────────────────────┘
                 ↓
          Class-H Headphone Amp (L+R)
                 ↓
          HP_L, HP_R output pins

    Notable external pins (per datasheet):

    If you want, I can:

    The WCD9341 is a high-tier discrete audio codec from the Qualcomm Aqstic line, primarily integrated with the Snapdragon 835 mobile platform . It is widely recognized as the audio engine for flagship devices like the Samsung Galaxy S8, Note 8, and Note 9 . Key Technical Specifications

    The WCD9341 is designed for audiophile-grade performance in mobile devices :

    Hi-Fi Playback Support: Native playback for up to 32-bit/384kHz PCM and DSD512 audio files .

    Dynamic Range: Up to 130 dB SNR (Signal-to-Noise Ratio), ensuring ultra-clean output .

    Total Harmonic Distortion (THD+N): Exceptionally low at -114 dB for high-fidelity reproduction .

    Headphone Amplifier: An integrated amp capable of outputting up to 2 Vrms, sufficient for driving higher-impedance headphones .

    Voice Features: Includes an integrated DSP for always-on voice UI (supporting two simultaneous wake-up words) with ultra-low power consumption .

    Physical Footprint: Typically comes in a 154-pin WLPSP (Wafer Level Chip Scale Package) . Common Use Cases & Repair

    This chip handles speaker output, microphone input, and complex voice processing . Technicians often replace this IC to fix specific motherboard-level faults such as: Distorted or "dead" audio . Muffled microphone input or no sound from speakers . Voice UI or wake-up word recognition failures .

    The Qualcomm Aqstic WCD9341 Go to product viewer dialog for this item.

    is a high-end mobile audio codec IC designed to deliver audiophile-grade sound performance and low-power voice UI capabilities in flagship mobile devices. Integrated into major flagship smartphones like the Samsung Galaxy S8, S10, and Note series, the

    acts as the primary hardware interface converting digital signals into pristine analogue audio.

    This technical guide provides a deep dive into the specifications, pinouts, repair troubleshooting, and technical architecture of the 🛠️ Overview of the WCD9341 Architecture The

    is part of the Qualcomm Aqstic audio platform. Unlike basic audio chips, it combines a highly efficient digital-to-analogue converter (DAC), an analogue-to-digital converter (ADC), and a dedicated digital signal processor (DSP) into a single, surface-mount package. Key Functional Blocks

    Integrated Audio DSP: Powers ultra-low-power voice processing and supports simultaneous wake-word detection for voice assistants. wcd9341 datasheet

    High-Resolution DAC: Delivers direct digital-to-analogue conversion capable of reproducing pure, high-fidelity audio.

    Microphone ADC: Manages multichannel microphone inputs with noise cancellation and echo suppression routines.

    Amplification Drive: Direct line-out and headphone amplification circuitry, removing the need for external op-amps. 📊 Qualcomm WCD9341 Technical Specifications

    The chip was developed to match the acoustic criteria of standalone Hi-Fi audio components. Its core capabilities include: Specification Details Manufacturer Qualcomm IC Model WCD9341 (also marked as WCD9341-001) Form Factor 154-pin BGA (Ball Grid Array) package PCM Audio Support Up to 384 kHz / 32-bit audio playback DSD Support Native DSD (Direct Stream Digital) audio decoding Low Noise Performance Ultra-low total harmonic distortion + noise (THD + N) Operating Application Flagship smartphones, enterprise computing 📌 Pinout & Physical Configuration The Go to product viewer dialog for this item.

    is built using a dense 154-ball layout. This high pin count handles high-speed digital audio buses, analogue power lines, and multi-channel microphone/speaker outputs. Primary Pin Categories Digital Audio Interfaces (SLIMbus / I2S)

    Used for communication with the main application processor (e.g., Qualcomm Snapdragon platform).

    Pins carry clock signals, transmit/receive data lines, and frame sync indicators. Analogue Input / Output Rails HPH_L / HPH_R: Left and right headphone outputs.

    MIC_IN_1 to MIC_IN_4: Low-noise bias pins and inputs for multiple microphones. EAR_OUT: Signal line for the earpiece speaker. Power Supply Rails Digital Core Voltage (VDD_DIG) Analogue Audio Voltage (VDD_ANA) Charge Pump Voltage Supply (VDD_CP) 🔧 Common Fault Symptoms and Diagnostics

    When the WCD9341 IC fails—often due to physical drops, liquid damage, or thermal stress—the device displays specific audio failures. Because this IC manages almost all sound processing, technicians from professional repair labs identify issues via these symptoms:

    No Sound Output: No audio from the bottom speaker, earpiece, or wired headphones.

    Distorted Audio: Crackling or heavily muffled sound across speaker and headphone paths.

    Microphone Failure: Inability to record voice memos, dead microphone in calls.

    Stuck in Headphone Mode: The device detects a connected headset when none is plugged in.

    Motherboard Shorts: Excessive current draw or a hot spot directly over the IC under thermal camera imaging. 🛠️ Repair and Replacement Guide

    Replacing the WCD9341 requires expert BGA micro-soldering and hot-air rework skills.

    [Fault Diagnosed] ➡️ [Apply Flux/Heat] ➡️ [Remove Chip] ➡️ [Clean Pads] ➡️ [Solder New IC] Steps for Installation

    Board Inspection: Test the surrounding capacitors for shorts to ground using a multimeter in diode mode.

    Desoldering: Apply professional-grade BGA flux around the chip. Heat the area to approximately 350°C to 380°C using a hot air station, then lift the IC with tweezers.

    Pads Cleaning: Use a soldering iron and desoldering wick to clean the motherboard pads thoroughly.

    Soldering: Place the new, pre-balled WCD9341 IC onto the motherboard, ensuring proper orientation of Pin A1. Heat until the solder balls reflow into place. When working with the WCD9341, engineers have reported:

    Are you troubleshooting a specific device model or experiencing a particular audio issue? A new audio codec built with the help of Golden Ears

    The Qualcomm WCD9341 is a high-fidelity Aqstic audio codec supporting up to 384-kHz/32-bit PCM and native DSD playback, designed for flagship mobile devices. It delivers a 130-dB dynamic range and -105-dB THD+N, often paired with the Snapdragon 835 to enable premium, low-distortion audio. For technical specifications and data sheet information, visit Qualcomm Technical Documentation

    The WCD9341 is a high-performance audio codec developed by Qualcomm, famously marketed as part of their Aqstic audio technology platform. It is designed to provide high-fidelity (Hi-Fi) audio experiences for premium mobile devices, such as smartphones and tablets. Core Technical Specifications

    The WCD9341 is engineered to meet audiophile-grade standards directly within mobile hardware:

    High-Resolution Audio Support: It supports PCM audio up to 384-kHz/32-bit and offers native support for DSD (Direct Stream Digital) playback.

    Dynamic Range: Features a high dynamic range of 123 dB, ensuring clear differentiation between the quietest and loudest sounds.

    Audio Quality: It boasts low THD+N (Total Harmonic Distortion + Noise) performance, minimizing signal degradation during playback.

    Interface Connectivity: The chip often interfaces via SLIMbus, UART, and PCM for audio data transmission within a mobile system-on-chip (SoC) architecture. Device Integration

    The WCD9341 is typically paired with high-end Qualcomm Snapdragon processors to handle complex audio processing tasks. Common pairings include:

    Snapdragon 835: This was the flagship pairing that introduced Aqstic technology to a wide audience.

    Snapdragon 670 and 710: These mid-to-high tier chipsets often utilize the WCD9341 to provide premium audio features in more accessible devices.

    Popular Smartphones: You can find this IC in notable devices like the Samsung Galaxy S8, Note 8, and Note 9, as well as the Xiaomi Mi Note 2. Use Cases and Repair

    In the mobile industry, the WCD9341 is a critical component for:

    Hi-Fi Music Playback: Delivering studio-quality sound to wired headphones.

    Replacement & Repair: It is a common part for technicians. If a phone experiences complete audio loss, distorted sound, or microphone failure, the WCD9341 IC is often the targeted component for replacement.

    The Qualcomm WCD9341 is a high-performance audio codec from the Aqstic family, designed for high-fidelity audio on flagship Snapdragon 835 and 845 platforms. It supports native DSD playback and 384kHz/32-bit PCM, while offering integrated DSP for low-power voice wake-up and Multi-Button Headset Control. For a detailed overview of Qualcomm Aqstic audio, visit Review: Meze Rai Solo - Son-Vidéo.com le Blog

    The WCD9341 is a high-tier discrete audio codec from the Qualcomm Aqstic family, specifically engineered to deliver high-fidelity (Hi-Fi) audio for flagship mobile devices. Originally paired with the Snapdragon 835 mobile platform, it serves as a critical component in smartphones like the Samsung Galaxy S8 and Note 8 to provide studio-quality sound reproduction. WCD9341 Technical Specifications

    The WCD9341 datasheet outlines a versatile subsystem designed to handle high-resolution playback and advanced voice processing:

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

    Dynamic Range: Capable of achieving a dynamic range greater than 120dB. Audio performance:

    Total Harmonic Distortion (THD+N): Maintains an ultra-low noise floor with THD+N less than -100dB.

    Package Type: Housed in a 154-pin BGA (Ball Grid Array) package.

    Sampling Rates: High-resolution playback up to 192kHz/24-bit or higher depending on the specific device implementation. Key Features and Capabilities

    Native DSD Support: Unlike many mobile codecs that convert DSD to PCM, the WCD9341 can process DSD signals directly, preserving the original audio quality for audiophile-grade listening.

    Golden Ear Filter: Supports Qualcomm's "Golden Ear" customizable filters, allowing manufacturers to tune the audio output to specific hardware signatures.

    Active Noise Cancellation (ANC): Integrated hardware support for high-performance active noise cancellation in headphones and headsets.

    Binaural Recording: Features high-fidelity ADCs (Analog-to-Digital Converters) that enable high-quality binaural audio capture for immersive recordings.

    Voice UI Enhancements: Includes dedicated hardware for low-power voice activation and "always-on" voice assistant features. Common Applications

    The WCD9341 is primarily used as the primary audio IC in high-end smartphones from 2017-2018. It is widely found in:

    Samsung Galaxy Series: S8, S8 Plus, S10, S10 Plus, Note 8, and Note 9.

    High-Tier Flagships: Devices powered by the Snapdragon 835 platform seeking high-resolution audio certification. Repair and Maintenance

    If a device experiences total loss of sound, microphone failure, or distorted audio, the WCD9341 IC often requires replacement. Due to its 154-pin BGA architecture, professional soldering tools and skills are required for installation. You can find replacement components through retailers like AliExpress or specialized mobile parts distributors. A new audio codec built with the help of Golden Ears

    is a high-fidelity audio codec IC from the Qualcomm Aqstic series, primarily integrated with the Snapdragon 835

    mobile platform. It is widely used in flagship devices like the Samsung Galaxy S8 Key Specifications Audio Quality : Supports playback of up to 384 kHz / 32-bit PCM audio and native DSD (Direct Stream Digital) Performance

    : Features a High-Fidelity DAC with a dynamic range typically exceeding

    and extremely low Total Harmonic Distortion plus Noise (THD+N). Voice Features

    : 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

    and other Snapdragon 835-powered devices like the HTC 10 and Xiaomi Mi Note 2. Hi-Fi Audio Systems

    : Utilized for professional-grade mobile audio recording and playback. repair guides for a specific device like the Galaxy S8 or Note 8?

    Title: Decoding the WCD9341: A Technical Overview of Qualcomm’s Audio Codec