14-bit A/D targets wideband apps

Dallas — Texas Instruments Inc. (TI) said this 14-bit, 170 megasample/second analog-to-digital converter features unmatched dynamic performance.

The ADS5545 offers 72 dBfs signal-to-noise ratio (SNR) and 84 dBc spurious-free dynamic range (SFDR) at the maximum sample rate of 170 Msamples/s and an input frequency of 150 MHz, providing increased system capabilities in advanced communications, instrumentation, test and measurement, medical, video and imaging applications.

“The ADS5545 builds upon the leadership performance of the ADS5500 14-bit, 125 Msamples/s A/D converter by offering best-in-class performance in a 7mm x 7mm QFN package with only 1 W core power dissipation,” said Roberto Sadkowski, business unit manager for TI's high-speed A/D converters. “This new device enables a wide range of benefits such as improved receiver capabilities in wireless communications, higher quality imaging in video systems and extended signal analysis for test equipment.”

The device includes an internal sample and hold, low-jitter clock buffer, internal reference, and options for parallel CMOS or low-voltage differential signaling (LVDS) outputs. It operates from a single 3.3-V supply and is specified over the industrial temperature range of -40°C to +85°C.

Linear Technology Corp. (Milpitas, Calif.) recently released a 14-bit A/D converter sampling at 125 Msamples/s — boasting strong AC performance, as well and extremely low power (395 mW). Also intended for wideband apps, the LTC2255 achieves 72.1 dB SNR and 85 dB SPDR at 70 MHz.

Click here for more details on LTC’s LTC2255 at eeProductCenter.

Analog Devices Inc. (Norwood, Mass.) is expected to commence production quantities of a 14-bitter this month that is said to achieve best-in-class SFDR and SNR specs.

Click here for more details on ADI’s AD9445 at eeProductCenter.

See TI's ADS5545 block diagram

TI's ADS5545 is sampling now, with volume production scheduled for 2Q 2006. The device comes in a 48-pin QFN package and is priced at $62.50 in 1,000-piece quantities (suggested resale pricing). EVMs are also available. Click here for the ADS5545 data sheet.

Texas Instruments , 1-800-477-8924,

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