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Op amps enable power savings, extended operation

Posted: 10 Jul 2007 ?? ?Print Version ?Bookmark and Share

Keywords:I/O operational amplifiers? solar cell devices? low-power precision applications?

pinPOINT ISL28194

Intersil Corp. has launched a new family of power-efficient, rail-to-rail I/O operational amplifiers and comparators that includes the ISL28194 chip which boasts a supply current rating of just 330nA typical and 450nA maximumless than half the supply current consumption of any competitive device.

This family, part of Intersil's new pinPOINT Precision Analog Product Line, also includes an op amp that delivers more bandwidth and typically consumes 1?A of supply current (ISL28195) and two comparators that typically consume 800nA (ISL28197) and 2.5?A (ISL28196).

A single-supply input voltage range from 1.8V to 5.5V makes this entire family well-suited for low-power precision applications running off of two 1.5V alkaline batteries such as smoke detectors, toxic gas detectors and temperature, humidity and pressure sensor/monitors. Other target applications include low-power solar cell devices.

These devices are designed to deliver battery savings and extended operation. First, their supply current ratings mean they consume less power while the devices are in operation. Second, the devices feature an enable/disable pin that can throttle the power consumption down to just 2nA when not in use. Operation is further extended by the input common mode range of these devices that extends all the way to the positive and negative input rail. This true rail-to-rail performance enables the op amp to consume more of a battery's available energy.

The devices are available in 6-Ld SOT-23 package. Pricing for ISL28194 is 79 cents and 73 cents for ISL28195/ISL28196/ISL28197, all in 1,000-unit quantities.

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