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Low-power, high-speed ADC suits optical networking

Posted: 06 Dec 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? optical networking? data acquisition?


austriamicrosystems has expanded its ADC portfolio with the AS1542, a multi-channel successive-approximation ADC with low power consumption and high DC performance. The high speed of 1Msps combined with 16-input channels makes the device suitable for optical networking, wired and wireless communications and all forms of data acquisition.

The AS1542 offers high 12bit resolution on each of the 16-input channels and uses advanced design techniques to achieve very low power dissipation at high throughput rates. At a conversion speed of 1Msps the AS1542 uses less than 2.4mA. In automatic shutdown mode the supply current drops to less than 0.5?A.

The 16 input channels are software configurable as 16-channel single ended or 8-channel fully differential analog inputs. Additionally, a sequencer and channel counter allows continuous or single conversions on selected channels without further user input and interruption of conversions while reprogramming the ADC. This allows the channel selection function to be altered while the sequence is in progress.

"There is an escalating demand for increased channel count on ADC and the AS1542 helps meet that requirement with 16 channels. Typical applications needing more channels include optical, wired and wireless communications and all forms of data acquisition," said Walter Moshammer, marketing director standard linear at austriamicrosystems. "At the same time, the fully differential input mode of the AS1542 enables very precise measurements under noisy conditions often found in industrial environments."

In addition, the AS1542 operates from a single 2.7V to 5.25V supply and contains a Vdrive (interface drive voltage) function that enables the serial interface to connect directly to either 3V or 5V processor systems independent of the ADC's supply voltage. The ADC can also be interfaced via a high speed SPI/QSPI/Microwire or DSP interface.

The AS1542 is available in a 28-pin TSSOP package suitable for operating environments ranging from -40C to 85C.

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