ASAHI KASEI [AK2305] AK2305 Dual PCM CODEC for ISDN TERMINAL ADAPTER GENERAL DESCRIPTION AK2305 is a dual PCM CODEC-Filter most suitable for ISDN Terminal Adapter.
A-law/ulaw is selected by the internal register.
In addition to CODEC, this device has dual DTMF receiver and External Tone Input pin.
Input/output operational amplifiers included in this device are used for transmit/receive gain adjustment.
AK2305 has internal volume control to attenuate signal from 0dB to –12dB by 3dB step control which is defined by an internal register written through the serial interface.
PCM interface of AK2305 accepts several clock formats, which are Long Frame, Short Frame, GCI, IDL.
64k-4096kHz clock i...

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