Application of GXSC codec chip replacing ES8311 in walkie talkies

As an instant messaging device, walkie talkies are widely used in various scenarios such as security patrols and outdoor operations. The quality of device communication depends on the ability to collect, process, and restore voice signals. Under the constraints of complex acoustic environments and battery power supply, walkie talkies need to balance high-definition voice transmission, strong anti-interference, low power consumption, and miniaturization characteristics. The audio codec of the audio link is the main chip to balance these requirements.

GXSC‘s low-power monaural audio codec chip, with its high fidelity audio processing, integrated voice enhancement function, and low-power control, is very suitable for the application environment of walkie talkies. It can replace ES8311 with PIN TO PIN, providing a cost-effective audio solution for various professional walkie talkies.

The GXSC codec chip has a fully differential output and supports programmable analog inputs in a fully differential configuration. The recording path includes a fully differential input, a low-noise programmable gain amplifier, and automatic gain control (ALC). When the sound is low, the automatic gain control will automatically increase the gain to ensure that the sound can be recorded and transmitted clearly. During the recording process, the built-in low-noise programmable filter can effectively eliminate environmental noise such as surrounding electrical equipment noise, background noise, etc. The playback path includes monaural DAC, programmable volume control, and fully differential output.

Main performance introduction of GXSC codec chip:

1. System: High performance and low-power 24 bit delta sigma audio ADC and DAC, I2S/PCM master serial or slave serial data port, 256/384Fs, USB 12/24MHz and other non-standard audio system clocks, and adopts I2C interface.

2. ADC: 24 bits, sampling frequency from 8 to 96kHz, 95dB signal-to-noise ratio, -93dB THD+N, one pair of differential analog inputs, low-noise programmable gain amplifier, automatic level control (ALC) and noise gate, supporting analog and digital microphones.

3. DAC: 24 bits, sampling frequency from 8 to 96kHz, 95dB signal-to-noise ratio, -85dB THD+N, one pair of differential analog outputs, dynamic range compression, burst and click noise suppression

4. Low power consumption: 1.8V to 3.3V operating voltage, low standby current

In addition, the codec chip has been optimized for voice recording/playback, making it highly suitable for monitoring and voice applications such as in car DV, IP CAMERNA, DVR, NVR, baby monitor, smart toys, smart robots, etc MP3、 Portable electronic devices, etc.