adg3123 Analog Devices, Inc., adg3123 Datasheet - Page 11

• Manufacturer Part Number: adg3123
• Description: 8-channel Cmos Logic To High Voltage Level Translator
• Manufacturer: Analog Devices, Inc.

APPLICATIONS
The high voltage operation coupled with high current driving
capability and the wide range of CMOS levels accepted by the
ADG3123, make the device ideal for LCD-TFT panel applica-
tions. In this type of application, the controllers that generate
the timing signals required to control the pixel scanning process
inside the panel are usually low voltage CMOS devices.
V
DD
= +2.3V TO +5.5V
CONTROLLER
TIMING
CONVERTER
DC TO DC
V
DD
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
Figure 18. Typical Application Circuit
GND
–5V TO –10V
+25V TO +30V
+25V TO +30V
Rev. A | Page 11 of 12
10
1
2
3
4
5
6
7
8
9
0.1µF
10µF
NOTE: |V
GND
A1
A2
A3
A4
A5
A6
A7
A8
V
SS
ADG3123
+
Most LCD-TFT panels operate at high supply voltages; therefore,
the timing signals generated by the controller require level
translation to drive the panel. Figure 18 shows a typical applica-
tion circuit where the ADG3123 translates eight timing signals
provided by the timing controller into high voltage logic levels
required to drive the panel.
DDB
V
V
| + |V
DDB
DDA
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
0.1µF
10µF
0.1µF
10µF
SS
20
19
18
17
16
15
14
13
12
11
+
| ≤ 35V and V
+
LCD-TFT
PANEL
DDA
≤ V
DDB
ADG3123