Wcd9341 Datasheet -
Three differential ADCs (each 24-bit, 96 kHz max) support:
ADC input impedance: 20 kΩ typical – watch out with high-Z MEMS mics (require external buffer).
The WCD9341 datasheet is more than a technical document; it is a roadmap to mobile audio excellence. While obtaining the full document requires legal agreements with Qualcomm, the publicly available specifications confirm that this codec remains a benchmark for high-fidelity portable audio.
For engineers, the takeaway is clear: The WCD9341 offers 130 dB dynamic range and native DSD support in a tiny 5x6 mm package—making it worth the effort to secure the datasheet via official channels. For audiophiles, understanding its pinout and power requirements explains why phones using this chip require high-impedance headphones (50Ω+) to unlock the "high-gain mode" described in Section 3.4 of the datasheet.
Next Steps for the Reader:
Disclaimer: This article is an aggregation of public research and reverse-engineered data. Qualcomm, Snapdragon, and WCD9341 are trademarks of Qualcomm Incorporated. For official engineering, please sign an NDA and request the proprietary datasheet directly from Qualcomm.
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.
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. wcd9341 datasheet
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.
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.
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. Three differential ADCs (each 24-bit, 96 kHz max) support:
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
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
Technical Specifications
Functional Block Diagram
The WCD9341 consists of the following functional blocks:
Applications
The WCD9341 is suitable for a wide range of audio applications, including:
Package and Pinout
The WCD9341 is available in a small package (e.g., WLCSP) with a compact pinout.
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!
No specific math was used; therefore, no $$Math$$ is shown. ADC input impedance: 20 kΩ typical – watch
WCD9341 Datasheet Analysis and Application Notes
Abstract
The WCD9341 is a highly integrated audio codec chip designed for portable and mobile applications. This paper provides an in-depth analysis of the WCD9341 datasheet, highlighting its key features, specifications, and potential applications.
Introduction
The WCD9341 is a System-on-Chip (SoC) audio codec designed for portable and mobile devices, such as smartphones, tablets, and laptops. The chip provides a comprehensive audio solution, integrating multiple functions including analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and audio processing capabilities.
Key Features and Specifications
The WCD9341 datasheet reveals the following key features and specifications:
Functional Block Diagram
The WCD9341 can be divided into several functional blocks, as shown below:
Application Notes
The WCD9341 is suitable for various portable and mobile applications, including:
Conclusion
The WCD9341 is a highly integrated audio codec chip designed for portable and mobile applications. Its key features, specifications, and potential applications have been discussed in this paper. The chip provides a comprehensive audio solution, integrating multiple functions including analog-to-digital converters, digital-to-analog converters, and audio processing capabilities.
Recommendations
Based on the analysis of the WCD9341 datasheet, the following recommendations are made:
Future Work
Future work on the WCD9341 may include:
The WCD9341 datasheet typically includes a reference schematic for integrating the chip into a Snapdragon 845 or 855 platform. Here is the standard topology: