ISD9361VRI Integrated Circuits (ICs)

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Introduction to ISD9361VRI

ISD9361VRI is a type of Integrated Circuit (IC) designed to provide a highly integrated solution for Voice Record and Playback applications. It is based on the ISD9361 Voice Recording IC, which provides two channels of 20-bit audio ADC/DAC and two channels of programmable microphone amplifiers. The device supports both stereo and mono recording modes, and is suitable for various consumer and industrial applications.

Application Field

The ISD9361VRI is designed to provide a cost-effective solution for applications such as portable audio systems, home theater systems, consumer and professional audio systems, video/audio recording systems, PC audio/multimedia applications, automotive audio/voice, cellular phones, and many other industrial applications. It can be used in applications where voice recording, playback, and storage are essential.

Working Principle

The ISD9361VRI uses a Direct Digital Synthesis (DDS) to convert the analog audio signals into a digital representation. The device is built with a highly integrated audio CODEC, which includes a 20-bit ADC/DAC and two microphone amplifiers. The ADC/DAC offers high performance sample rate conversion. The ADC and DAC’s sampling rate can be adjusted to different frequencies, allowing for recording of either stereo or mono signals. The ADC/DAC also supports various sample rates as needed.

The device also incorporates a digital signal processor along with an embedded 8051 CPU to control the overall recording and playback process. The 8051 CPU is programmable and can be used to customize the recording or playback process. It can also be used to implement various functions such as playback gain, pitch shifting, and time stretching.

The device supports various audio file formats including WAV, MPEG, Photoshop, and AIFF. It also supports different compression modes, including Mp/CD, DAT/Dolby/2.4, IMA4 and U-Law. The device can store recorded signals in its internal memory in either RAW or compressed formats. The recorded audio signals can also be transferred to external digital media or to a computer system.

Conclusion

The ISD9361VRI is a cost-effective and versatile IC for Voice Record and Playback applications. It provides a integrated solution for capturing, processing and storing audio signals. The device is suitable for a variety of applications and supports different audio file formats and compression modes. The ISD9361VRI is an ideal IC for applications requiring high performance and scalability.

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