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Clock multiplier features 60ps jitter

Posted: 14 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? TI? clock multiplier? CDCE906?

Texas Instruments (TI) announced a programmable clock multiplier with low jitter of 60ps and in-system spread spectrum adjustment that improves performance, simplifies development and saves cost in consumer applications. Designers can hot program the device's three phase locked loop (PLL) components in-circuit to generate six output clocks from a single source for any frequency up to 167MHz, which speeds development of equipment such as digital STBs, digital televisions (DTV), DVD players, audio/video (A/V) receivers and printers.

According to the press release, the CDCE906 provides advantages to help designers meet the performance requirements of consumer applications. For example, the high-resolution PLL dividers of the CDCE906 provide a very low-jitter clock from a single 27MHz crystal clock and feature zero-PPM output clock error for most A/V frequencies and applications. This enables customers to achieve precise video and audio clock performance, including requirements for high-performance audio data converters like the PCM1850 stereo audio analog-to-digital converter for DTVs, said TI.

Another key performance enhancement is provided by the device's hot-programmable spread spectrum clocking (SSC), which lowers system electromagnetic interference (EMI) and helps reduce the need for a metal shield to block EMI. Hot-programmability enables designers to adjust the level of SSC on the fly, so they can rapidly fine-tune to optimize the system for EMI compliance qualification and also reduce the need for board redesigns for different applications. Programmable output slew-rate control and selectable output voltages of 2.5V and 3.3V further reduce system EMI.

The CDCE906 is the latest in TI's extensive portfolio of high-performance analog and DSP products for audio applications, including audio data converters, the Aureus family of audio DSPs, PurePath Digital audio amplifiers and Class-D audio amplifiers. TI provides the silicon, software, systems expertise and support for the entire audio signal chain, enabling customers to get to market quickly.

The CDCE906 is 3.3V supplied, operates in the commercial temperature range from 0 to 700C, and is packed in a 20-pin thin shrink small outline package (TSSOP) package. This product is already sampling and will be in full production in 1Q 2006. Suggested resale pricing is $2.60 each in 1,000-unit quantities. A development kit and programming kit will be available to simplify PLL design and programming.

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Related Datasheets
Part Number Description Category
? CDCE906 Programmable 3-PLL Clock Synthesizer / Multiplier / Divider (Rev. H) Actives - Transistors and Diodes



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