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'Fastest' 16bit ADC fits multiple process devices

Posted: 25 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? spectrum analyzers? CDMA?

Texas Instruments Inc. has launched the market's first 16bit, single-channel, 200MSps ADC to provide faster speeds that are earlier only available with lower resolution devices.

The ADS5485 achieves an SNR of 75dBFS and a spurious-free dynamic range of 87dBc for a 70MHz input frequency. The ADS5485 eases analog front-end design by integrating a fully differential input buffer. Created in TI's BiCom3 high-speed process technology, this buffer gives constant input impedance over input frequency and removes kickback from the ADC's track-and-hold structure to ensure consistent signal linearity.

The performance of the ADS5485 promotes design flexibility and has many system-level benefits in communications, test and measurement and defense applications. It provides 16bit resolution with up to 100MHz bandwidth for high-speed digitizers, spectrum analyzers, test and measurement equipment and general data acquisition systems. It also enhances transmit power amplifier linearization and efficiency along with a digital predistortion algorithm, reducing total system cost.

The converter employs sampling of larger bandwidths in radar systems, resulting in enhanced tracking resolution and object discrimination. It also permits software-defined radios to implement a greater number of standards such as WiMAX, LTE and CDMA.

The ADS5485 expands TI's ADS548x family of high-speed, ultralow-noise ADCs. The devices are available in a space-saving 9mm x 9mm, 64-pin QFN package.

- Ismini Scouras
eeProductCenter





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