Datasheet

LM7321, LM7322
SNOSAW8D –MAY 2008–REVISED MARCH 2013 www.ti.com
Figure 71. Output Sinking Characteristics with Load Lines
SETTLING TIME WITH LARGE CAPACITIVE LOADS
Figure 72 below shows a typical application where the LM7321/LM7321Q/LM7322/LM7322Q is used as a buffer
amplifier for the V
COM
signal employed in a TFT LCD flat panel:
Figure 72. V
COM
Driver Application Schematic
Figure 73 shows the time domain response of the amplifier when used as a V
COM
buffer/driver with V
REF
at
ground. In this application, the op amp loop will try and maintain its output voltage based on the voltage on its
non-inverting input (V
REF
) despite the current injected into the TFT simulated load. As long as this load current is
within the range tolerable by the LM7321/LM7321Q/LM7322/LM7322Q (45 mA sourcing and 65 mA sinking for
±5V supplies), the output will settle to its final value within less than 2 μs.
22 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated
Product Folder Links: LM7321 LM7322