CXAR41334 is a highly integrated audio processor that integrates multiple audio inputs, sound processing, volume control, and subwoofer output. This chip supports 4.1 channel output and has 4 stereo inputs (including 1 pseudo differential input), each of which can independently adjust the gain; Supports master volume, loudness, and high/low tone control, all functions are digitally adjusted through the I2C bus. The chip is packaged in SSOP36 and is suitable for various car audio hosts, multimedia systems, and aftermarket audio upgrade solutions.
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[ CXAR41334 ]"
CXAR41334: Highly integrated 4.1-channel audio processor designed specifically for car audio systems
With the rapid development of intelligent cockpit and audio-visual entertainment systems in automobiles, higher requirements have been put forward for the performance and integration of in car audio processing chips. CXAR41334, as a high-performance 4.1-channel audio processor designed specifically for car audio systems, is an ideal choice for modern car audio systems due to its comprehensive sound adjustment capabilities, flexible input-output configuration, and simple I2C control interface. This article will systematically introduce the core features, functional modules, typical applications, and design points of CXAR41334, helping engineers create a more outstanding in car auditory experience.
1、 Chip Overview: A versatile core for car audio processing
CXAR41334 is a highly integrated audio processor that integrates multiple audio inputs, sound processing, volume control, and subwoofer output. This chip supports 4.1 channel output and has 4 stereo inputs (including 1 pseudo differential input), each of which can independently adjust the gain; Supports master volume, loudness, and high/low tone control, all functions are digitally adjusted through the I2C bus. The chip is packaged in SSOP36 and is suitable for various car audio hosts, multimedia systems, and aftermarket audio upgrade solutions.
2、 Core Features and Advantages
2.1. Multiple inputs and adjustable gain
The chip provides 4 stereo inputs, including 3 single ended inputs and 1 pseudo differential input (configurable as the 4th single ended input). The gain of each input can be adjusted in 1dB steps within the range of 0 to+15dB to adapt to different audio source levels.
2.2. Channel independent output
Supports four full frequency channels including left front, right front, left rear, and right rear, as well as one subwoofer channel output. The volume of each channel can be independently adjusted within the range of+15dB to -79dB, achieving precise sound field balance and low-frequency enhancement.
2.3. Comprehensive sound processing
· High and low frequency adjustment: Bass (±); 15dB@100Hz ）Compared to high notes (±); 15dB@15kHz ）Independently adjustable;
· Loudness compensationSupports loudness control from 0 to -15dB to enhance low-frequency response at low volumes;
· Subwoofer filteringBuilt in second-order low-pass filter, with optional cutoff frequencies of 80Hz, 120Hz, and 160Hz.
2.4. Mixed input function
Support mixed output of auxiliary audio sources (such as navigation and mobile audio) and main channel to enhance system scalability and practicality.
2.5. Low noise and low distortion
Under typical working conditions, the output noise is as low as 5μ V, THD<0.025%, ensuring high fidelity sound quality output.
3、 Internal Structure and Function Description
The internal structure of CXAR41334 includes an input multiplexer, loudness control, volume control, high and low frequency adjustment, mixing control module, and subwoofer filtering unit. The signal process is as follows:
· After input selection and gain adjustment, the audio signal enters loudness and volume control;
· Subsequently, tone processing is carried out through the high and low frequency adjustment module;
· The full frequency signal is output to four speaker channels, and the low-frequency signal is mixed and filtered before being output from the subwoofer channel.
In addition, the chip supports second audio input and rear speaker signal source selection, further enhancing system flexibility.
4、 I2C control interface and register configuration
All functions of CXAR41334 are digitally controlled through I2C interface, supporting standard mode (100kbit/s) and fast mode (400kbit/s). Its control protocol is based on an address byte+data byte structure, and the main configuration registers include:
· 00HMain input selection and input gain;
· 01HLoudness control and subwoofer cut-off frequency;
· 02HMaster volume adjustment;
· 03H~04HBass and treble control;
· 05H~0AHAttenuation and mixing control for each channel;
· 0BHSecond input selection and rear speaker signal source settings.
When designing, attention should be paid to the initial time of the I2C bus (recommended 50ms), and communication operations should be carried out only after ensuring stable power supply.
5、 Typical Application Circuit
The typical application circuit of CXAR41334 is shown in Figure 16, and the peripheral components mainly include:
· Input/output coupling capacitor (2.2μ F~10μ F);
· High/low frequency adjustment capacitor (8.2nF~68nF);
· Subwoofer filtering capacitors (C1P, C2);
· I2C pull-up resistor (4.7kΩ).
In the design, attention should be paid to the separation of analog and digital ground. It is recommended to install decoupling capacitors (4.7 μ F~100 μ F) on the power pins to suppress noise.
6、 Electrical characteristics and performance parameters
· power supply voltage5V~10V (typical 9V);
· quiescent current: Typical 30mA;
· output levelMaximum 2.5Vrms (THD<0.3%);
· channel isolation:>85dB (single ended input);
· Subwoofer output gain+15dB~-79dB, 1dB step.
7、 Precautions for packaging and welding
CXAR41334 adopts SSOP36 packaging, and the structural dimensions are detailed in the data manual. As an electrostatic sensitive device, anti-static measures must be taken during welding and operation to avoid performance degradation or failure caused by ESD damage.
8、 Conclusion: Empowering car audio innovation, choosing JTMIC
CXAR41334 provides a complete solution for modern car audio systems with its high integration, flexible control interface, and excellent audio performance. Whether it is a front-end host or a back-end upgrade solution, this chip can help developers achieve high-quality and multifunctional audio processing effects.
As JTMIC（jtm-ic.com）One of the highly recommended car audio chips, we provide customers with comprehensive technical support and original stock supply. Welcome to visit the official website to learn more about product details and design solutions, and work together with JTMIC to promote innovation and development of car audio technology!
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