ISD4004-10MEI

Series:	ChipCorder®
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Interface:	SPI
Moisture Sensitivity Level (MSL):	--
Input Signal:	Analog - Differential
Output Signal:	Analog - Single Ended
Sampling Frequency:	6.4kHz
Duration:	10 Min
Filter Pass Band:	2.7kHz
Messaging:	Multiple
Oscillator Type:	Internal/External
Features:	Auto Mute
Operating Temperature:	-40°C ~ 85°C (TA)
Voltage - Supply:	2.7V ~ 3.3V
Mounting Type:	Surface Mount
Package / Case:	28-TSSOP (0.465", 11.80mm Width)
Supplier Device Package:	28-TSOP

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Introduction

The ISD4004-10MEI (Integrated Signal Detection & Data Interpolation with Echo Cancellation) is a highly integrated specialist device designed for a broad range of applications in the field of communications. It combines on a single chip both digital and analog techniques to produce a fully integrated audio interface, enabled to both record audio signals to an external digital store and to play back the stored sound data.

Voice Record and Playback

The integrated digital/analog techniques of the ISD4004-10MEI provide a variety of useful functions specifically designed to optimize voice recording and playback. The chip has internal digital recording and digital-to-analog conversion capabilities, allowing up to 10 seconds of voice data to be stored quickly and easily.The ISD4004-10MEI features a programmable conversion frequency ranging from 4 to 8 kHz and supports multiple input and output operating formats, including PCM, ADPCM, and GMXV (Gated Multi-bit eXtended Variable rate). Additionally, its integrated echo cancellation circuitry provides a clear and natural sound for both recorded and playback audio signals.

Applications

The ISD4004-10MEI is well-suited for use in various audio applications such as in telephone systems, VoIP systems, portable devices, speech recognition, and voice recognition applications, among others. The chip is capable of providing optimized audio performance in a variety of voice systems, due to its integrated automatic gain control, analog and digital record/playback capability, and digital-to-analog conversion.Furthermore, its integrated digital-to-analog conversion also allows for efficient audio encoding, which can save transfer bandwidth or storage space compared to traditional analog techniques. In addition, its low power consumption and small size make it well-suited for use in mobile applications.

Working Principle

The ISD4004-10MEI works using advanced digital signal processing techniques. The device features an integrated A/D converter and a digital signal processing engine, both of which can be programmed via a serial port. The A/D converter enables digitization of up to 10 seconds of audio data, which can be stored in internal RAM for later playback. The DSP engine provides flexibility for a wide range of audio recording algorithms, allowing for different encoding schemes as well as automatic gain control and echo cancellation.In addition, the ISD4004-10MEI features an integrated analog-to-digital converter, enabling direct recording onto an external digital storage device, such as a hard drive, optical drive, or flash drive. The device also includes a digital-to-analog converter, which allows for digital playback via analog lines or loudspeakers. The integrated echo cancellation circuitry reduces feedback loop distortion and provides an enhanced audio experience in playback.

Conclusion

The ISD4004-10MEI is a highly integrated single chip device equipped with both analog and digital recording and playback capabilities. Its digital signal processing engine allows for a wide range of recording algorithms, ranging from PCM to ADPCM, giving users the ability to optimize audio performance for their specific application. Additionally, the chip’s integrated echo cancellation circuitry provides a clear and natural sounding audio experience. With its ability to record up to 10 seconds of audio data directly onto an external digital storage device, the ISD4004-10MEI is well-suited for voice applications in telecommunication systems, VoIP systems, mobile devices, speech recognition applications, and more.

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