LM8207
www.ti.com SNOSAL5A – SEPTEMBER 2005 – REVISED MARCH 2013 LM8207 TFT 18 Gamma Buffer + VCOM Driver + Voltage Reference
Check for Samples: LM8207 FEATURES DESCRIPTION The LM8207 is a combination of 18-channel gamma
buffers, a VCOM driver and a temperature
compensated internal voltage reference. It is
designed for buffering voltage levels and driving high
capacitive loads in large TFT panels. The gamma
buffers are individually optimized to the input/output
requirements of their respective gamma position to
cover the whole voltage range from rail to rail. Any
desired gamma correction curve can be obtained by
combining the gamma buffers with external resistors.
The VCOM driver has a high output current capability
and is stable with large capacitive loads, typical for
large panel sizes. This will result in a fast recovery
time for large voltage variations at the output. The
internal band gap reference can be used to form a
highly stable voltage to generate the gamma
correction voltages. In combination with the internal
amplifier, the reference voltage can be programmed
to voltages up to the positive rail. The LM8207 is
offered in a 48-pin TSSOP package. 1 2 Gamma Buffers 1-2 Swing to VDD
Gamma Buffers 17-18 Swing to VSS …
