EE Product News

ADCs Extend Battery Life

Groomed for portable data-acquisition systems and other battery-powered products, the AS1530/31 family of differential, 12-bit, 8-channel low-power a/d converters integrate 2.5V references and deliver up to 400 ksamples/s. In lead-free TSSOP-20 packages, the devices provide four analog input modes and specify a SINAD in excess of 70 dB. The AS1530 operates from a 4.5V to 5.5V supply and consumes 2.8 mA at 400 ksamples/s while the AS1531 operates from a 2.7V to 3.6V supply, consuming 2.2 mA at 300 ksamples/s. Software power down reduces current consumption to 0.4 mA in reduced-power mode and 0.5 µA in full power-down. This reduces total power consumption at sampling rates of 10 ksamples/s to 27.5 µA per channel and less than 0.55 µA at lower data rates. Shared features include SPI, QSPI, and a Microwire-compatible interface. For prices, call AUSTRIAMICROSYSTEMS USA INC., Raleigh, NC. (919) 676-5292.


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