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AKM converter targets portable data terminals

Posted: 12 Nov 2004 ?? ?Print Version ?Bookmark and Share

Keywords:asahi kasei Microsystems? akm? ak4641? adc? dac?

Asahi Kasei Microsystems Co. Ltd (AKM) has introduced a single-chip 16bit mono A/D and stereo D/A converter with built-in Bluetooth-Interface mono CODEC for next-generation smart portable data terminals and PDAs.

According to AKM, the AK4641 was developed to give portable data terminals an advanced feature set in a single chip. The device provides a built-in mono ADC for voice recording and a stereo DAC for audio playback.

With a built-in 5-band equalizer to maximize sound quality during playback, the AK4641 is a core device for a high-quality audio player, and with a built-in mono CODEC for Bluetooth Interface it is ideal for applications such as Bluetooth headsets.

The press release states that the AK4641 has a host of features, including a unique microphone auto level control circuit, digital attenuator for volume control; differential analog input-output interface for exchanges between analog voice and portable telephone module; and a power management function for on/off switching of power to each circuit block.

The AK4641 can handle a variety of sampling rates from 7kHz to 48kHz (8kHz to 16kHz for mono CODEC), and both stereo and mono analog outputs are compliant with external headphones and speaker amplifiers. It has an operating voltage range from 2.6V to 3.6V, and is available in a 36-pin QFN (6mm?) package. Evaluation boards and samples are already available.

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