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ADI touts 'first' HDMI transmitter with on-chip CEC support

Posted: 29 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:HDMI transmitter? high-definition audio video? CEC support?


Analog Devices Inc. (ADI) has launched the ADV7520NK low-power HDMI v1.3 transmitter for portable media and DVD players, video recorders, and other mobile multimedia devices supporting high-definition (HD) audio and video content.

ADI claims that the device is the first HDMI transmitter to incorporate a consumer electronic control (CEC) buffer on-chip, which reduces component count, eases design complexity and speeds time to market for portable HD devices by eliminating the need for the design engineer to develop a separate CEC support channel.

Providing added convenience, the CEC feature allows end users to use a single remote control to run multiple CEC-enabled HD devices, eliminating the need to juggle separate remotes to control the TV, STB and portable HD devices. The CEC-enabled HDTV remote can be used to play or rewind movies, manage power-on, input selection and power-off functions for the TV, cable/satellite STB or audio/video receiver, switch between boxes, or change video and audio modes.

The ADV7520NK adds CEC support to the low-power design of ADI's AD9387NK HDMI transmitter, which enables longer-running battery-powered video devices. The new HDMI transmitter also includes 5V-tolerant I/Os that support I?C and hot plug detect. This further simplifies system design and extends battery life in portable electronics by eliminating external voltage translator chips to convert these I/O signals from 5 Vto either 1.8V or 3.3V

In addition, the new HDMI transmitter includes support for xvYCC (known as "extended view" or "extended Gamut YCC" as specified in IEC 61966-2-4) color gamut metadata, which increases the range of available colors to render the most life-like images possible when playing back digital video content. The ADV7520NK supports HDMI v1.3, Digital Video Interface v1.0, and HDCP v1.3 standards as well as Sony/Philips Digital Interface Format and eight channels of Inter-IC Sound audio to enable 7.1 surround sound audio with a max sample rate of 192kHz.

The ADV7520NK HDMI transmitter is compatible with other ADI components in the advanced TV signal chain, including the AD9388A 10bit dual analog/HDMI receiver; AD7142 programmable capacitance touch screen sensors; and ADV7180 and ADV7441 video decoders.

ADV7520NK is sampling now, and will be available in full production quantities in November 2007. The ADV7520NK is priced at $4.13 per unit in 1,000-unit quantities and is available in a 76-ball BGA package or a 64-lead LFCSP.

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