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Low-power comparators eliminate supply-current glitches

Posted: 07 Dec 2006 ?? ?Print Version ?Bookmark and Share

Keywords:austriamicrosystems? comparators? AS1970-75? single-input? double-input?

AS1970-75 line of comparators from austriamicrosystems

austriamicrosystems has introduced the AS1970-75, its first line of comparators that offers a choice of single, dual or quad input, combined with low power consumption down to 8.5?A per comparator input. These ICs are suitable for a variety of battery-powered applications.

The AS1970-75 family can be used with single 2.5-5.5V supplies, making it suitable for 3V and 5V applications. Dual 1.25 to 2.75V supplies can also be supported. The ICs can be powered by two AA cells while offering rail-to-rail capability and a low input bias current of 1pA. Furthermore, the 0.5mV input offset voltage and internal 3mV hysteresis combined with low power consumption makes this comparator family suitable for battery monitoring and management applications in portable devices.

"Because of the unique design of its output stage, the AS1970-75 family virtually eliminates supply-current glitches typical of many other comparators," said Walter Moshammer, director of marketing standard linear at austriamicro. "The jutting architecture also dramatically increases battery life, even in high-speed applications."

The AS1970/72/74 have a push/pull output stage that sinks and sources current. The AS1972/73/75 have an open-drain output stage that can be pulled beyond Vcc, making them suitable for mixed-voltage designs, logic-level translators or bipolar-to-unipolar converters. Large internal output drivers allow rail-to-rail output swings with loads up to 8mA.

The AS1970/71 single comparators are available in a space-saving, 5-pin SOT23 package, the AS1972/73 dual comparators come in a 8-pin MSOP package and the AS1974/75 quad comparator are delivered in a 14-pin TSSOP package.

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