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.
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EETInfo No. 617