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ADC with I?C interface draws less power

Posted: 23 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? I²C? TSSOP package?

austriamicrosystems has introduced an ADC with an I?C interface that delivers power consumption in the microamp range. The AS1538 combines low-power operation, maximum possible conversion speed for I?C and fully-differential or single-ended analog input modes in a 16pin TSSOP package. Target applications include 2.7-5.25V battery-powered and industrial applications using an I?C bus.

The AS1538 offers 12bit resolution on each of the eight input channels. The device offers a conversion speed of 50ksps while using less than 850?A supply current (including the internal reference). In shutdown mode the supply current drops to less than 1.5?A. The internal 2.5V reference or an external reference in the 1-.25V range determines the full-scale analog input range. Total harmonic distortion is -75dB.

The I?C-compatible interface supports interface speeds up to 3.4MHz including industry-standard speeds of 100kHz and 400kHz. User-programmable I?C addresses allow up to four devices on one I?C bus. The operating temperature range is -40C to 85C

Pricing starts at $2.74 each in quantities of 1,000.

- Gina Roos

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