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High-capacity ADCs minimize system operation cost

Posted: 21 Oct 2008 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? clock? multiplexer? signal?

Texas Instruments Inc. (TI) has released four low-power ADCs that reduce power use while offering high capacity for precision applications. The 12bit ADS7229 and ADS7230 and the 14bit ADS7279 and ADS7280 integrate a 1MSps successive approximation register (SAR) ADC with inherent sample and hold and a conversion clock.

The ADCs are developed for applications that need high AC/DC performance, increased sampling rates and the reduced power use such as handy medical instruments, multichannel data acquisition systems and ATE.

The ADS7229 and ADS7279 have a single unipolar input for applications that need a single data converter per channel. Meanwhile, the ADS7230 and ADS7280 give a two-to-one input multiplexer that helps each ADC to digitize two channels, which lowers component count and board size. All these four ADCs have an SPI-compatible interface to reduce board space and ease connection to the host device in enabling improved channel densities and a smaller overall system footprint, according to TI.

The devices are believed to deliver enhanced accuracy for high dynamic range signals and exceptional SNR. The ADCs use 13.7mW at 1MSps with a 3V supply and are specified over the industrial temperature range from -40C to 85C.

The ADCs are suitable to the ADS8329 and ADS8330, which use only 15.5mW and also provide enhanced onboard power-saving features that permit them to scale with sampling rate. The ADS7279 and ADS7280 are drop-in pins that fit ADS7229 and ADS7230, as well as the 16bit ADS8329 and ADS8330.

-Gina Roos
Green SupplyLine

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