BUF20820 Datasheet, PDF (19/32 Pages) Burr-Brown (TI) – 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels

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BUF20820
BUF20820
15V
2V−5.5V
14.8V
Digital
Analog
REFH
SBOS330C − DECEMBER 2005 − REVISED OCTOBER 2006
Reference buffer
and V_{COM OUT}
outputs can be used
for extra gamma channels.
(REFH OUT
will be a fixed
voltage.)
REFH OUT
17V
Source
Driver
GMA 1
V_{COM OUT1}
GMA 2
V_{COM OUT2}
GMA 3
OUT 1
OUT 2
GMA 4
GMA 5
2 V_COM Channels plus
18 Output Channels
SDA
SCL
LD
OUT 17
GMA 20
Control IF
A0
REFL
15V
0.2V
OUT 18
REFL OUT
0.2V
GMA 21
GMA 22
Panel
Output of reference
buffer can be used
for an extra fixed
gamma channel.
V_COM
2V−5.5V
8V−18V
Digital
BUF01900
Analog
Voltage Regulator
BIAS
SDA
SCL
4 x OTP Switch
ROM Control
10−Bit
DAC
Control IF
A0
V_COM
Buffer
V_COM OUT
Figure 17. 22-Gamma Channel Solution
19