buf06703 Datasheet, PDF (17/25 Pages) Burr-Brown (TI) – MULTI-CHANNEL LEC GAMMA CORRECTION BUFFER

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APPLICATIONS WITH >10 GAMMA CHANNELS
When a greater number of gamma correction channels
are required, two or more BUFxx703 devices can be
used in parallel, as shown in Figure 39. This provides
a cost-effective way of creating more reference
voltages over the use of quad-channel op amps or
buffers. The suggested configuration in Figure 39
simplifies layout. The various different channel versions
provide a high degree of flexibility and also minimize
total cost and space.
BUF07703
BUF06703
BUF05703
SBOS269A – MARCH 2003 – REVISED JUNE 2003
MULTIPLE V_COM CHANNELS
In some LCD panels, more than one V_COM driver is
required for best panel performance. Figure 40 uses
three BUF07703s to create a total of 18
gamma-correction and three V_COM channels. This
solution saves considerable space and cost over the
more conventional approach of using five or six
quad-channel buffers or op amps.
Figure 39. Creating > 10 Gamma Voltage
Channels
Table 1. > 10 Channel Gamma Combinations
BUF11702 BUF07703 BUF06703 BUF05703
12ch
—
—
2
—
12ch + V_COM
—
1
1
—
14ch + V_COM
1
—
—
1
16ch + V_COM
1
—
1
—
18ch + V_COM
2
—
—
—
20ch + V_COM
2
—
—
—
Figure 40. 18-Channel Application with Five
Integrated V_COM Channels
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