LMV422| Datasheet

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Dual Rail-to-Rail Output Operational Amplifier with Power Select

February 2005

LMV422 Dual Rail-to-Rail Output Operational Amplifier with Power Select
General Description
The LMV422 dual rail-to-rail output amplifier offers a power select pin (PS) that allows the user to select one of two power modes depending on the level of performance desired. This is ideal for AC coupled circuits where the circuit needs to be kept active to maintain a quiescent charge on the coupling capacitors with minimum power consumption. For portable applications, the LMV422 operates in low power mode consuming only 2 uA of supply current per channel at a bandwidth of 27 kHz. This allows the user to reduce the power consumption of an amplifier while maintaining an active circuit. For additional bandwidth and output current drive the amplifier can be switched to full power mode with 8 MHz bandwidth while consuming only 400 uA per channel. The LMV422 features a rail-to-rail output voltage swing in addition to an input common mode range that includes ground. The LMV422 is designed for closed loop gains of plus two (or minus one) or greater. The LMV422 is offered in 10-Pin MSOP miniature package to ease
the adoption in applications where board area is at a premium.

Features
n Supply voltage n Supply current per channel -- Low power mode -- Full power mode n Input common mode voltage range n CMRR n Output voltage swing n Input offset voltage n Bandwidth -- Low power mode -- Full power mode n Stable for AV +2 or AV -1 2.7V to 5.5V 2 uA 400 uA -0.3V to 3.8V 85 dB Rail-to-Rail 1 mV 27 kHz 8 MHz

Applications
n AC coupled circuits n Portable instrumentation n Smoke detectors

Typical Application

20109835

AC Coupled Application

2005 National Semiconductor Corporation

DS201098

www.national.com