P>San Jose, Calif. - A single-chip audio codec from Asahi Kasei Microsystems Semiconductor Inc. (AKM) features a 192-kHz digital-to-analog converter; a 24-bit, 96-kHz analog-to-digital converter; and a 192-kHz Sony/Philips Digital Interface (S/PDIF) audio transceiver. The two-in, two-out AK4584 targets consumer and professional audio applications, including CR-R and DVD recorders, home theater systems, automotive telematics and digital audio workstations.
The codec is among the first devices of its kind to integrate an S/PDIF transceiver. The transceiver, based on AKM's AK4114 digital transceiver chip, features an input selector that supports four channels and suits the codec for use in consumer audio receivers that must be capable of switching among multiple digital inputs.
A built-in amp makes it possible to input unbalanced signals without external circuitry. Proprietary non-pulse-code-modulated digital stream detection is available for AC-3, DTS, 192-kHz audio and other formats, and a built-in crystal oscillator circuit eliminates an external component.
The A/D in the AK4584 has a 100-dB dynamic range and integrates a digital high-pass filter for offset cancellation.
The AK4584 requires a single 5-V supply or can be operated with a split 3-V/5-V system. The codec is housed in a 44-pin LQFP and is priced at $8.17 in quantities of 1,000.
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EETInfo No. 606