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Dual-Mode Op Amps Feature Unique Power-Saving Mode

Santa Clara, Calif. — National Semiconductor Corp.'s dual power mode operational amplifier, the LMV422, has a unique power-saving mode that allows customers to reduce power consumption while maintaining an active circuit. This allows for faster turn-on times in smoke detectors and other sensor interface applications where reaction time is critical.

“National's LMV422 is high-performance analog in action,” said Erroll Dietz, vice president of National's Amplifier product group. “National has developed leading-edge technology where it matters most to customers ” in low-power embedded systems where active circuits can be easily set from a low-power mode to a high-power mode, conserving battery life while keeping the circuit active.”

National's LMV422 is a dual, rail-to-rail operational amplifier. With an external control pin, the LMV422 can be switched between a very low power (2 μA per channel) and low-bandwidth (27 kHz) mode to a full power (400 μA per channel) wide-bandwidth (8 MHz) mode. These combinations reduce power consumption, maintain necessary charges on the coupling capacitors and shorten the time needed to stabilize the signal after switching from low power to high-power mode. Additionally, the input bias of the LMV422 is very low at 5 pA, and has a supply voltage range of 2.7 V to 5 V and a common mode rejection ratio (CMRR) of 85 dB.

National's LMV422 is available now in 10-pin mini SOIC packaging and is priced at $1.20 in 1,000-unit quantities.

For National's LMV422 datasheet, please visit www.national.com

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