A 'tiny' 650 kHz, rail-to-rail output, operational amplifier that operates down to 2,7 V supply while consuming only 4,6 µA is being offered by Micrel Semiconductor.
The MIC861 operates from 5 down to 2,7 V and provides a -3 dB bandwidth of 650 and a 400 kHz gain-bandwidth product, yet consumes only 4,6 µA supply current. Traditional op-amps at this speed consume more than 50 µA, and many consume much more. Packaging is also much smaller; Micrel's Teeny SC70-5 packaging is approximately one-half the size of SOT23-5 packaging.
The MIC861 is unity gain stable. It is specified at supply voltages of 2,7 and 5 V. Input offset voltage is 2 mV (typical), large signal voltage gain is 83 dB, PSRR is 85 dB and CMRR is 80 dB.
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