LMH6554_15 Datasheet, PDF (12/29 Pages) Texas Instruments – LMH6554 2.8-GHz Ultra Linear Fully Differential Amplifier

LMH6554
SNOSB30P – OCTOBER 2008 – REVISED JANUARY 2015
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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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