LMH6550 Datasheet, PDF (13/33 Pages) National Semiconductor (TI) – Differential, High Speed Op Amp

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LMH6550
SNOSAK0I – DECEMBER 2004 – REVISED JANUARY 2015
8.4 Device Functional Modes
This wideband FDA requires external resistors for correct signal-path operation. When configured for the desired
input impedance and gain setting with these external resistors, the amplifier can be either on with the PD pin
asserted to a voltage greater than Vs– + 1.7 V, or turned off by asserting PD low. Disabling the amplifier shuts
off the quiescent current and stops correct amplifier operation. The signal path is still present for the source
signal through the external resistors. The Vocm control pin sets the output average voltage. Left open, Vocm
defaults to an internal midsupply value. Driving this high-impedance input with a voltage reference within its valid
range sets a target for the internal Vcm error amplifier.
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