WCD 9335 Mobile Phone IC
High-Performance WCD 9335 Mobile Phone IC
The WCD 9335 Mobile Phone IC is engineered to enhance your smartphone’s audio and overall system performance. Designed with modern applications in mind, this integrated circuit ensures seamless functionality and outstanding efficiency, making it a reliable choice for next-gen mobile devices. WCD 9335 Mobile Phone IC
Compact Design with Reliable Functionality
Featuring a compact and durable design, the WCD 9335 IC is perfect for space-sensitive configurations. Whether you’re upgrading or assembling a new device, this IC delivers robust performance while optimizing space and power efficiency, ensuring a hassle-free integration process. WCD 9335 Mobile Phone IC
Why Choose the WCD 9335 Mobile Phone IC?
With its advanced architecture and reliable operations, the WCD 9335 IC stands out as a dependable solution for mobile device manufacturers and technicians. Deliver superior sound quality and power efficiency to your devices by incorporating this high-quality IC into your projects. WCD 9335 Mobile Phone IC
The Qualcomm WCD9335, often marketed under the Qualcomm Aqstic™ brand, is a high-performance, standalone audio codec IC designed for flagship smartphones. It made its debut alongside the Snapdragon 820 and 821 chipsets, powering legendary devices like the Samsung Galaxy S7, HTC 10, and the original Google Pixel. WCD 9335 Mobile Phone IC
Unlike integrated audio solutions, the WCD9335 is a dedicated silicon chip that offloads audio processing from the main application processor to provide Hi-Fi sound quality, ultra-low power consumption for “always-on” voice features, and advanced noise cancellation. WCD 9335 Mobile Phone IC
Technical Specifications Table
| Feature | Specification |
| Manufacturer | Qualcomm Technologies, Inc. |
| Marketing Name | Qualcomm Aqstic™ Audio Codec |
| Process Node | 40 nm CMOS |
| Package Type | 113-pin FOWPSP (Fan-Out Wafer Level Chip Scale Package) |
| Dimensions | 4.17 mm × 3.91 mm |
| Sampling Rate (DAC) | Up to 192 kHz (Native 384 kHz support for internal paths) |
| Bit Depth | 24-bit / 32-bit PCM |
| Signal-to-Noise Ratio (DAC) | 130 dB |
| Signal-to-Noise Ratio (ADC) | 110 dB |
| Dynamic Range | Up to 130 dB |
| THD+N (Headphone) | -105 dB to -109 dB |
| Input Channels | 6 Analog Input Ports (up to 6 ADCs) |
| Output Channels | 7 Analog Output Ports (up to 7 DACs) |
| Digital Interfaces | SLIMbus, I2S, I2C, Soundwire |
| Microphone Support | 6 Digital Mic inputs (3 clock/data pairs); 4 Mic Bias outputs |
| Headphone Amp | Integrated Class-H (Ground-referenced) |
| Power Consumption | ~6 mW (Low-power playback); ~34 mW (High-perf playback) |
Core Architecture and Features
1. Audiophile-Grade Playback (DAC)
The WCD9335 is engineered for “Master Quality” audio. By supporting up to 192kHz/24-bit (and in some configurations 32-bit) PCM playback, it allows mobile devices to reproduce audio that matches the standards used in recording studios. Its ultra-high 130 dB Dynamic Range ensures that even the quietest details in a track are preserved without being lost in the noise floor.
2. Smart Recording (ADC)
The chip features six high-performance Analog-to-Digital Converters (ADCs). This allows the phone to handle complex microphone arrays used for:
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Active Noise Cancellation (ANC): Real-time suppression of ambient noise during calls.
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High-Fidelity Recording: Capturing concerts or interviews with minimal distortion.
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Fluence™ Technology: Qualcomm’s proprietary noise suppression and echo cancellation suite.
3. Integrated Class-H Headphone Amplifier
The WCD9335 includes an integrated Class-H headphone amplifier. Class-H technology is highly efficient because it dynamically adjusts the power supply voltage based on the audio signal level. This results in:
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Lower Heat: Important for thin mobile chassis.
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Extended Battery Life: Minimizes waste during long listening sessions.
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No DC Blocking Caps: The ground-referenced output eliminates the need for bulky capacitors, saving PCB space.
4. Always-On Voice Activation
A standout feature is the Ultra Low-Power Voice Activation Engine. This dedicated hardware block allows the phone to “listen” for trigger words (like “Hey Google” or “Alexa”) while the main application processor is asleep. It consumes less than 0.95 mA, ensuring that voice assistants don’t drain the battery.
5. Multi-Interface Support
The WCD9335 is highly versatile in how it talks to other chips:
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SLIMbus: The primary interface for high-bandwidth digital audio.
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Soundwire: A two-wire interface used specifically to drive external smart speaker amplifiers (like the WSA8810/8815).
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MBHC (Multi-Button Headset Control): Detects 3.5mm jack insertions, determines if it’s a 3-pole or 4-pole plug, and manages remote control button presses.
Application and Performance
In the mobile ecosystem, the WCD9335 acts as the “bridge” between the digital world of your Spotify app and the physical vibrations of your speakers or headphones.
Power Management
The chip is remarkably efficient, requiring only two external power supplies (1.8V and a battery supply). All other internal rails are generated by the IC’s own integrated buck converters and LDOs. In low-power playback modes, it can operate at a total system power draw of just 6 mW, making it one of the most efficient Hi-Fi codecs of its generation.
Compatibility
While primarily designed for the Snapdragon 820 (MSM8996), it is also found in mid-to-high tier designs using the MSM8976 (Snapdragon 652) and MSM8956 (Snapdragon 650).
Troubleshooting and Repair Note
In the repair industry, the WCD9335 is a frequent subject of “No Audio” or “No Mic” troubleshooting. Since it is a BGA (Ball Grid Array) chip with 113 pins, it requires professional micro-soldering tools and a hot air station to replace. Common symptoms of a failing WCD9335 include:
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The “grayed out” voice memo icon.
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No sound from the earpiece and speaker simultaneously.
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Phone freezing when trying to play audio or video.90
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