Dual PCM CODEC with Volume

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AK2306 is a dual PCM CODEC-Filter most suitable forISDN Terminal Adapter. It includes Selectable A-law/u-law function, InternalGain Adjustment from +6dB to –18dB by 1dB stepcontrol, Selectable 16Hz/20Hz Ring Tone Generator forSLIC. All of these functions are controlled by theinternal register accessed through the serial interface. PCM interface of AK2306 accepts Long Frame, ShortFrame clock formats and GCI format. 64 x NkHz(128k-4096kHz) clock input is available for PCM interface. AK2306 and AK2306LV are pin-compatible, but different products which power supply voltage are 5.0V and 3.3V, respectively

Key Features

· Dual PCM CODEC and Filtering systems for ISDN Terminal Adapter

· Selectable Ring Tone Generator for SLIC

16Hz or 20Hz tone is available.

· Independent functions on each channel controlled by the internal register

- Power Down Mode

- Mute

- Gain Adjustment: +6 to -18dB (1dB step)

· Selectable PCM Data Interface Timing:

Long Frame / Short Frame/GCI

· Variable PCM Data Rate:

64k x N [Hz] (128k - 4.096MHz)

· OP Amp for External Gain Adjustment

· A-law/u-law Register Selectable

· Serial Interface to access the internal register

· Power on Reset

· Single Power Supply Voltage

+5.0V ± 5% (AK2306)

+3.3V ± 0.3V (AK2306LV)

· Low Power Consumption

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Block Diagram

Block Diagram

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