103 dB, 192 kHz, Stereo Audio ADC with 6:1 Input Mux # Technical Documentation: CS5346CQZ 24-Bit, 192 kHz Stereo A/D Converter
Manufacturer : Cirrus Logic
Document Revision : 1.0
Date : October 26, 2023
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## 1. Application Scenarios
The CS5346CQZ is a high-performance, 24-bit, 192 kHz stereo analog-to-digital converter (ADC) designed for professional and consumer audio applications requiring exceptional dynamic range and low distortion. Its integrated features and serial audio interface make it a versatile solution for digitizing high-quality analog audio signals.
### Typical Use Cases
* Digital Mixing Consoles & Audio Interfaces: Capturing microphone, line-level, and instrument inputs with high fidelity. The device's 114 dB dynamic range and -100 dB THD+N ensure pristine audio capture for recording and live sound.
* Home Theater & A/V Receivers: Digitizing analog audio from legacy sources (e.g., tape, vinyl phono preamps, set-top boxes) for processing within modern digital surround sound systems.
* Broadcast & Professional Audio Equipment: Used in studio-grade preamplifiers, outboard gear, and broadcast mixing desks where robust, low-noise conversion is critical.
* High-End Consumer Audio: Integrated into premium soundbars, DAC/preamplifier units, and digital music systems for superior analog input conversion.
* Automotive Infotainment Systems: Digitizing audio from AM/FM tuners, satellite radio, or auxiliary inputs for digital signal processing (DSP) and amplification (requires attention to power supply filtering in the electrically noisy automotive environment).
### Industry Applications
* Professional Audio & Music Production: Found in studio interfaces, microphone preamps, and digital snake systems.
* Consumer Electronics: High-fidelity A/V components, streaming audio devices, and gaming peripherals.
* Broadcast & Telecommunications: Equipment for radio/TV production and conference systems.
* Automotive: Premium in-vehicle audio and telematics systems.
### Practical Advantages and Limitations
Advantages:
* High Performance: Excellent dynamic range (114 dB, A-weighted) and very low THD+N (-100 dB) enable transparent audio capture.
* Flexible Interface: Supports I²S, left-justified, and TDM (DSP) serial audio formats, offering compatibility with a wide range of digital signal processors, codecs, and microcontrollers.
* Integrated Features: Includes on-chip digital high-pass filters (DC offset removal), digital attenuation, and de-emphasis, reducing external component count and system complexity.
* Single Supply Operation: Operates from a single +5 V or +3.3 V analog supply and a +1.8 V to +5 V digital I/O supply, simplifying power system design.
* Low Power: Typically consumes 95 mW, making it suitable for portable or power-sensitive designs.
Limitations:
* Analog Input Structure: Requires external operational amplifiers to drive its differential or single-ended voltage-input architecture, adding to the bill of materials and board space.
* Clock Sensitivity: Like all high-resolution audio ADCs, performance is highly dependent on a clean, low-jitter master clock (MCLK). Poor clock integrity will degrade measured SNR and THD+N.
* No On-Chip PGA: Lacks a programmable gain amplifier (PGA). Input signal level matching must be handled by the external driving circuitry.
* Thermal Considerations (CQZ Package): The 48-lead LQFP package requires attention to PCB thermal design in high-ambient-temperature or densely packed applications to ensure reliable operation.
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## 2. Design Considerations
Successful implementation of the CS5346CQZ requires careful attention to analog, digital, and layout design to achieve
