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14bit ADC promises high speed at low power

Posted: 22 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:14bit dual ADC? analog digital converter? 3G?


Texas Instruments Inc. has introduced a dual, 14bit ADC at 250MSps to deliver a premier combination of wide signal bandwidth, high dynamic performance and low power consumption.

The ADS62P49 achieves 73dBFS SNR and 85dBc spurious-free dynamic range at an input frequency of 60MHz. Claimed to deliver the fastest sample rate, the ADS62P49 provides increased signal bandwidth without compromising range and sensitivity in communications and defense imaging systems or accuracy in wide-band test and measurement equipment.

"Communications, defense and test design engineers are constantly challenged to create signal and data acquisition receivers with increasingly wide signal bandwidths that do not compromise overall system performance," said Art George, senior vice president of TI's high-performance analog business unit. "TI addresses these challenges with the ADS62P49 which delivers high-performance, compact, power-efficient designs and enables rapid deployment of 3G and 4G systems, software defined radios (SDRs) and spectrum analyzers."

The ADC also features low power of 625mW per channel that reduces thermal footprint for increased system efficiency in high-density, multi-antenna base station receivers and SDRs. The device also includes programmable gain and other user-selectable settings maximize design flexibility. Internal gain up to 6 dB in 1-dB steps allows customers to optimize SNR, SFDR and input swing based on the unique need of their applications. Designers can maximize SNR to enhance linearization effectiveness in digital pre-distortion (DPD) solutions, while SFDR can be increased and input drive reduced to improve small-signal analysis in defense and radio receiver applications

In addition, a complete signal chain with comprehensive evaluation tools suite speeds time to market. First in a series of four 12- and 14bit dual channel ADCs with sample rates of 210- and 250MSps (ADS62P28, ADS62P29, ADS62P48). The device is pin-compatible to dual-channel ADS6000 family for easy upgrades in speed and resolution.

The ADS62P49 is available today in a 9mm x 9mm QFN package for $144.75 in 1,000-piece quantities. The ADS62P49EVM has on-board sockets for a voltage-controlled crystal oscillator, crystal filter and TI's newest high-performance clock distribution and jitter cleaning chip, the CDCE72010, which allows the EVM to function as a system-level evaluation kit and an ADC evaluation board.

Customers can also leverage TI's TSW1200 digital capture tool for rapid evaluation of LVDS-output ADCs of up to 16bit resolution and 500MSps sample rates to enable prototyping of complex systems and to further speed development time.

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