BUF20800 Datasheet, PDF (16/27 Pages) Burr-Brown (TI) – 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels

BUF20800
SBOS329D − JUNE 2005 − REVISED OCTOBER 2006
18V
2V−5.5V
17.8V
Digital
BUF20800
Analog
REFH
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 OUT 1
GMA 2
V_COM OUT 2
GMA 3
O UT 1
O UT 2
GMA 4
GMA 5
2 V_COM Channels plus
18 Output Channels
SDA
SCL
O UT 17
GMA 20
Control IF
LD
A0
REFL
18V
2V−5.5V
0.2V
18V
OUT18
REFL OUT
0.2V
GMA 21
GMA 22
Panel
Output of reference
buffer can be used
for an extra fixed
gamma channel
V_COM
Digital
B U F01 900(1)
Voltage Regulato r
Analog
BIAS
SDA
SCL
4 x OTP Switch
ROM
Control
10− Bit
DAC
Control IF
A0
V_COM
Buffer
V_COM OUT
NOTE: (1) Expected availability is Q4’ 06.
Figure 15. 22-Channel Gamma Solution
16
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