Santa Clara, Calif. - National Semiconductor Corp. has tucked its LM432 dual operational amplifier and 2.5-V voltage reference in an eight-pin SOIC. It's designed mainly for use as a secondary side driver for an optoisolator in low-cost lithium ion cell phone battery chargers that need protective isolation barriers. The device offers a typical offset voltage of 0.6 mV, input bias current of 3 nA, supply current of 150 microamps and common-mode input voltage range (including ground) of 0 V to VS 1 V. The integrated reference is a shunt regulator adjusted to a fixed output voltage of 2.5 V. The price is 33 cents in lots of 1,000.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.