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|AKM Launches High Performance Single-Chip Multi-Function Audio CODEC
for AV Systems|
Tokyo, Japan - Asahi Kasei Microsystems Co. launches the AK4683, a
multi-function audio CODEC for flat-screen TVs, home theatre systems, DVD receivers and in-car applications.
versatile chip integrates a 2-channel ADC, 4-four channel DAC (192 kHz sampling), a headphone amplifier and a192 kHz
compatible Digital Audio Receiver and Transmitter (DIR/DIT) with four inputs and one output.
AK4683’s digital audio interface (S/PDIF) and headphone amplifier make it easy to put together high performance home
theatre systems. The pre-ADC stage has a preamp with 6-channel input selector. As the preamp input range can be
easily configured with external resistors it can tolerate a 5V input power supply, such as 4 Vrms or more. The
post-ADC digital volume controls allow for independent level adjustments from +24 dB to -103 dB.
The AK4683 DAC has four output channels and built-in digital volume controls for independent adjustment of the
level from +12 dB to –115 dB. Two of the four channels have a headphone and line outputs, and the headphone output
features a mute circuit that eliminates the need for an external mute circuit to suppress the pop noise generated
when power is switched on/off.
The AK4683 DAC has four output channels and built-in digital
volume controls for independent level adjustments from +12 dB to -115 dB. Two of the four channels have a headphone
and line outputs. The headphone output features a mute circuit that eliminates the need for an external mute circuit
to suppress the ‘pop’ generated when power is switched on or off.
The AK4683’s digital audio
interface conforms to AES3, IEC60958, S/PDIF and EIAJ CP1201. Along with the digital audio receiver and transmitter
it is compatible with 192 kHz, 24-bit data. The DIR has a 4-channel input selector and interfaces with many digital
AV devices as it detects both PCM and non-PCM data, such as Dolby Digital.
The serial audio
interface for a digital signal processor (DSP) has two ports and each ADC, DAC and DIR/DIT block can be operated by
two-system blocks. The audio format is compatible with TDM systems and pre-packed and post-packed I2S, which
simplifies the DSP interface.
The AK4683 is available in a 64-pin LQFP package. Evaluation boards
and engineering samples are available now.
Jueves, 01 Septiembre, 2005 - 09:45