DALLAS - Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a clock
synthesizer and jitter cleaner that offers the lowest phase noise and jitter in its class. The device addresses
customers' growing requirement for higher performance and increased design flexibility in applications such as
2.5G/3G wireless base stations, data communications, medical imaging, and test and measurement.
The CDCM7005 provides precise, stable frequencies for signal-chain devices such as
analog-to-digital converters (ADC), digital-to-analog converters (DAC), digital upconverters (DUC) and digital
downconverters (DDC). It offers the industry's lowest phase noise of -219 dBc/Hz (PLL figure of merit), lowest
phase jitter performance of 162 fs (LVPECL) and 232 fs (LVCMOS), and maximum output skew of 20 ps. This performance
allows data converters such as ADCs to be undersampled at higher input frequencies while delivering the highest
The CDCM7005 offers features that maximize design flexibility, including
serial peripheral interface (SPI) logic for programming and individual support control. The device synchronizes a
voltage-controlled crystal oscillator (VCXO) frequency up to 2.2 GHz (LVPECL) to one of two reference clocks to
deliver high-frequency, clean clock outputs. The outputs can be divided by 1, 2, 3, 4, 6, 8 or 16 divide ratios and
delivered at LVCMOS and LVPECL levels.
Other useful features include the device's bias voltage
(VBB) pin, which allows it to supply the correct voltage to a single-ended VCXO, eliminating the need for external
resistors and thereby simplifying the design. In addition, the CDCM7005 supports frequency hold-over mode and
fast-frequency locking for failsafe and increased system redundancy.
The 3.3-V CDCM7005 is
available today in industrial temperature range (-40C to 85C) from TI and its authorized distributors in either a
64-pin, 0.8-mm ball-grid array (BGA) or 48-pin, 0.5-mm quad flat no-lead (QFN) package. Suggested resale pricing in
1,000-piece quantities is $10.75. An evaluation module is also available.
products and digital signal processors (DSP) optimized for wireless infrastructure applications comprise the
industry's most complete signal chain solution for base station OEMs. In addition to the low-noise CDCM7005, TI
offers other high-performance analog products and DSPs, including the DAC5687 low-noise, 16-bit 500-MSPS dual DAC
and the TMS320TCI6482 DSP. Nine of the top 10 base station OEMs use TI technology