Norwood, Mass. Analog Devices Inc. (ADI) has introduced two multichannel audio devices, the AD1836 coder/decoder and the AD1833 digital-to-analog converter.
The AD1836 has six D/A and four analog-to-digital converters (A/Ds). It supports multiple digital stereo channels with 24-bit conversion resolution and a 96-kHz sample rate. The AD1833 offers six D/A converters with a 192-kHz sample rate and 24-bit resolution for two channels, and a 96-kHz sample rate for all six channels. It complies with the latest Digital Versatile Disk (DVD) audio specifications.
The ICs are designed for use in home theater equipment, automotive audio systems and digital audio-effects processors. The AD1833 can also be used in new DVD players.
Product marketing manager Ken Nevard said both devices are based on ADI's patented Sigma-Delta modulation architecture that is said to reduce idle tones. A data-directed scrambling capability, also patented, is said to minimize sensitivity to jitter.
The AD1836 features a 108-dB dynamic range for each of its six D/As and a 104-dB dynamic range for its four A/Ds. The AD1833 features a 108-dB dynamic range for each of its D/As.
The AD1836 codec requires a +5-V supply but it also has a separate supply pin for its digital interface, so it can be used with 3.3-V devices. The part is packaged in a 52-pin MQFP and is priced at $9.50 in 1,000-piece quantities. It is available in sampling quantities and production quantities are scheduled for this month. The AD1833 comes in a 48-pin LQFP and is priced at $6.80. It has the same power requirement and delivery schedule as the AD1836.
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EETInfo No. 619