Analog Devices offers op amp with over-voltage protection for industrial process control

Analog Devices Inc. (ADI) in Norwood, Mass., is introducing an integrated precision operational amplifier (op amp) with on-chip over-voltage protection circuitry for industrial equipment designers. The ADA4091-2 offers specified performance–including the on-chip over-voltage circuitry–to simplify equipment design and error analysis in industrial process controls, battery-powered instrumentation, power supply control, protection systems, and remote sensors. “Industrial amplifiers are subject to fault voltages from a variety of sources, including electro-magnetic interference, damaged cabling, lightning strikes and other disturbances on the power grid, incorrect hookups to other system components, and power-line surges when power to the system is restored after routine service or equipment upgrades,” says Steve Sockolov, product line director at the ADI Precision Signal Processing segment. “Such over-voltage conditions can cause phase inversion or damage the amplifier and other circuitry, resulting in system lock-up or outright failure.” The 1.5-MHz op amp features a 350-micro amps-per-channel supply current, a 0.5-volts-per-microsecond slew rate, and offset voltage of 500 microvolts maximum. For more information, visit ADI online at www.analog.com.