Datasheet

LM8261
www.ti.com SNOS469I –APRIL 2000–REVISED MARCH 2013
Figure 57. Output Sinking Characteristics with Load Lines
TFT APPLICATIONS
Figure 58 below, shows a typical application where the LM8261 is used as a buffer amplifier for the V
COM
signal
employed in a TFT LCD flat panel:
Figure 58. V
COM
Driver Application Schematic
Figure 59 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 LM8261 (45mA sourcing and 65mA sinking for ±5V supplies), the output will
settle to its final value within less than 2µs.
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