ISD4002-150EY

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Part Status:	Obsolete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:	150 Sec
Filter Pass Band:	2.7kHz
Messaging:	Multiple
Oscillator Type:	Internal/External
Features:	Auto Mute
Operating Temperature:	0°C ~ 70°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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IntroductionThe ISD4002-150EY is an interface device used to record and playback voice signals. It is a low power, low voltage and high performance system-on-chip (SoC) solution specifically designed for voice recording and playback applications. Its integrated voice sampling and digital signal processing help to achieve excellent performance from audio compression and improved digital audio quality. Application FieldISD4002-150EY is usually used in variety of applications such as medical recording systems, industrial monitoring, telephone and military related applications. ISD4002-150EY can also be used in security systems, video conferencing, voice mail and keypad solution. The ISD4002-150EY can collect and process sound from the environment and transfer it digitally, allowing it to be easily processed, stored, and distributed across a network digitally. This technology allows organizations and systems to better record, store, and process voice data.Working PrincipleISD4002-150EY works on the principle of pulse code modulation (PCM), where an audio signal is converted into digital format with reduced noise and distortion. PCM is the most common method used to digitize voice signals.The audio signal is sampled at regular intervals to generate a stream of discrete values which then get encoded into a digital format. The ISD4002-150EY features a 64 kilobit per second (Kb/s) signal-to-noise ratio (SNR) which is a measure of signal quality. The sampling process is further optimized by voice processing algorithms. These algorithms compress the audio signal and store it into memory. It removes noise, filters signal, and corrects for spatial and temporal distortion. The audio signal is then passed through an analog-to-digital converter (ADC), which converts the analog signal into a digital signal. The data is then stored in memory for playback. When the audio signal needs to be played back, the digital signal is passed through a digital to analog converter (DAC), which converts the digital signal back into an analog signal which can then be amplified and sent to a speaker.ConclusionISD4002-150EY is a powerful and efficient interface device used in many different applications. Its integrated voice sampling and digital signal processing provide excellent performance from audio compression and improved digital audio quality. ISD4002-150EY works on the principle of PCM and its feature of 64 Kb/s SNR ensures signal quality. The audio signal is processed by various methods to reduce noise, filter signal, and correct for spatial and temporal distortion. The audio signal is then converted into digital format and stored in memory for playback.

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