ISD4004-10MSI

Interface - Voice Record and Playback

ISD4004-10MSI are microphone record and playback integrated chips, which can be applied to any devices needing voice record and playback, such as radio, toy, telephone, etc. These chips are essential operating elements in the circuit, their working principle and application fields are discussed in this article.

Working principle

ISD4004-10MSI record and playback IC has 3 electro-acoustic transducer for signal input and output, it\'s main components include a signal amplifier, a signal storage system and a signal output amplifier. It is powered by a voltage between 4.5V-5.5V, with a recording output of 0.8W-3.4W. The main working principle is based on the small signal amplifier, storage and playback technology, which can be divided into five steps. Firstly, the voice or sound signals are amplified by the signal amplifier and transfers to the storage part; Secondly, the signals are converted into numerical signals and saved in the IC’s memory; Thirdly, during the playback of the signals, they are decoded from numerical signals and sent as analog signal to the signal output amplifier; Fourthly, the output amplifier is used to increase the signal amplitude, which is strong enough to drive the speaker; Finally, the sound signal is heard by the listener.

Application fields

ISD4004-10MSI is an ideal choice for voice record and playback in applications such as radio, telephone, remote alarm, voice guidance, etc. They have abundant interface options that can meet the need of multiple applications, and are also adjustable, so users can freely adjust the sampling rate, playback volume, etc. without needing extra hardware.

For example, many of the emergency phone systems in car use ISD4004-10MSI record and playback chips, when the sensors in the car detect a possible emergency situation, the chip will initiate emergency call via the car owner’s mobile phone and record the voice of the calling party. Also in medical equipments such as ECG machine and ultrasonic diagnostic devices, the chip is used to record and playback the therapy results and patient’s physiological data. In addition, in radio and clock toys, ISD4004-10MSI can also be used to record and play the sound.

Conclusion

ISD4004-10MSI are devices that integrate voice record and playback functions. Having wide application fields, they are suitable for remote alarm, medical devices, radio and clock toys, automobile emergency phone, etc. They have a small size, power saving and good performance, technology, very suitable for gadgets that have space constraints.