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ADCs eye compact apps, devices

Posted: 31 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? A/D converters? portable DAQ apps?

austriamicrosystems AG has rolled out the AS1524/25 ADC family that operates on low power at high sampling speeds.

The AS1524 is a 12bit, low-power, single-channel full-differential ADC, and the AS1525 a dual-channel, single-ended low-power ADC. Combining low-power operation at a high sampling speed of 150KSps, the AS1524/25 family is suitable for small battery-powered devices and portable DAQ systems, including remote sensors or pen digitizers with tight space requirements.

The AS1524/25 consumes 350?A (3V) at the 150KSps maximum sampling rate. The automatic shutdown feature places the device into sleep mode between conversions, reducing the power consumption at lower sampling speeds. At a reduced speed of 100KSps, the power consumption drops to 245?A (3V). The consumption drops down to 2.5?A at a speed of 1KSps and 200nA during shutdown.

SPI, QSPI and a microwire-compatible interface enable high-speed data access while minimizing board space. Both devices generate an internal clock and support an external clock for increased flexibility. Both parts operate from a 2.7 to 5.25V single supply. The AS1524/25 family is available in an eight-pin 3 x 3mm TDFN package; suitable for operating environments ranging from -40-85C.

- Emily Gleason

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