BUF20800-Q1 Datasheet, PDF (19/32 Pages) Texas Instruments – 18-CHANNEL GAMMA VOLTAGE GENERATOR WITH TWO PROGRAMMABLE VCOM CHANNELS

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18V
2V5.5V
17.8V
Digital EFH Analo g
R
B UF 20800-Q1
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
OUT 1
OUT 2
GMA 4
GMA 5
2 V_COM Channels plus
18 Output Channels
SDA
SCL
OUT 17
GMA 20
Control FI
LD 0
A
REF L
18V
2V5. 5V
0.2V
18V
OUT18
REFL OUT
0.2V
GMA 21
GMA 22
Panel
Output of referenc e
buffer can be use d
for an extra fixed
gamma channel
V_COM
Digital
Analog IAS
B
B UF01 900 (1)
Voltage Regulato r
SDA
SCL
4 x OT P Switch
ROM
Control
10 Bit
DAC
Contro l IF
A0
V_COM
Buff er
V_COM OUT
Figure 15. 22-Channel Gamma Solution
BUF20800-Q1
SBOS571 – AUGUST 2011
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): BUF20800-Q1
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