Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 1 of 14 V 0.1
AAT7201
Details are subject to change without notice
10+1-Channel Buffer for TFT LCD
Features
10 Channels with Output Current: +30mA
(MAX)
1
com
V
with Output Current: +100mA
(MAX)
Unity Gain Buffer Capable of Driving
Large Capacitive Loads
Input Range Matched to LCD Reference
Requirements
DD
V
Specified for 6.5V to 16.0V
TQFP48 Package
Pin Configuration
TOP VIEW
General Description
The AAT7201 is a 10+1-channel buffer
designed to increase the driving capability for
thin film transistor liquid crystal display (TFT
LCD). This device includes a
com
V
buffer
circuit, four rail-to-rail buffer amplifier circuits
and six buffer amplifier circuits. Each buffer is
capable of driving heavy capacitive loads and
offering fast current loading (
com
V
: 100mA,
the others: 30mA).
AAT7201 comes in a space-saving TQFP48
package, which makes it an ideal component in
LCD TV and monitors.
TQFP48
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 2 of 14 V 0.1
AAT7201
Pin Description
Pin No.
Name
I/O
Description
1
o9
O
Buffer Channel 9 Output
2
o8
O
Buffer Channel 8 Output
3
o7
O
Buffer Channel 7 Output
4
o6
O
Buffer Channel 6 Output
5 NC -
-
6 NC -
-
7 GND I
Ground
8
DD
V
I Power
Supply
9 NC -
-
10 NC -
-
11
o5
O
Buffer Channel 5 Output
12
o4
O
Buffer Channel 4 Output
13
o3
O
Buffer Channel 3 Output
14 NC -
-
15
DD
V
I Power
Supply
16 NC -
-
17 NC -
-
18
o2
O
Buffer Channel 2 Output
19 GND I
Ground
20
o1
O
Buffer Channel 1 Output
21 GND I
Ground
22
DD
V
I Power
Supply
23
i1
I
Buffer Channel 1 Input
24
i2
I
Buffer Channel 2 Input
25
i3
I
Buffer Channel 3 Input
26
i4
I
Buffer Channel 4 Input
27
i5
I
Buffer Channel 5 Input
28 NC -
-
29 NC -
-
30
DD
V
I Power
Supply
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 3 of 14 V 0.1
AAT7201
Pin Description (Cont.)
Pin No.
Name
I/O
Description
31 GND
I
Ground
32 NC -
-
33 NC -
-
34
i6
I
Buffer Channel 6 Input
35
i7
I
Buffer Channel 7 Input
36
i8
I
Buffer Channel 8 Input
37
i9
I
Buffer Channel 9 Input
38
i10
I
Buffer Channel 10 Input
39
com
I
I
Com Buffer Input
40 NC -
-
41 NC -
-
42 NC -
-
43
DD
V
I Power
Supply
44 GND
I
Ground
45
DD
V
I Power
Supply
46 GND
I
Ground
47
com
O
O
Com Buffer Output
48
o10
O
Buffer Channel 10 Output
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 4 of 14 V 0.1
AAT7201
Absolute Maximum Ratings
CHARACTERISTICS SYMBOL VALUE UNIT
Supply Voltage
DD
V
+18 V
Input Voltage
I
V
5
.
0
-
to
5
.
0
V
DD
+
V
Output Voltage
O
V
5
.
0
-
to
5
.
0
V
DD
+
V
Output Loading Current for Gamma ,
Rail-to-Rail Buffer
30
mA
Output Loading Current for Com Buffer
L
I
100
mA
Maximum Junction Temperature
J
T
+125
o
C
Operating Temperature
C
T
20
-
to +85
o
C
Storage Temperature
storage
T
45
-
to +125
o
C
Lead Temperature (Soldering for10
seconds)
-
260
o
C
Note 1: Value beyond absolute maximum ratings may cause permanent damage to the device.
Advanced Analog Technology, Inc.
Advanced Analog Technology, Inc
.
Page 5 of 14 V 0.1
AAT7201
Electrical Characteristics
(V
DD
=10V, T
C
=25
o
C unless otherwise specified.)
Power Supply Performance
Parameter
Test
Conditions Min
Typ
Max
Units
Power Supply Rejection
Ratio
PSRR
DD
V
varies from 6.5V to
16.0V
- 80 - dB
Supply Current
S
I
-
9
-
mA
Input Characteristics
Parameter
Test
Conditions Min
Typ
Max
Units
Input Offset Voltage
OS
V
I
V =
DD
V
/2,
O
V =
DD
V
/2
- 2 12 mV
Input Bias Current
B
I
I
V =
DD
V /2 ,
O
V =
DD
V
/2
- 2 50 nA
Output Characteristics
Parameter Test
Conditions
Min
Typ
Max
Unit
L
I =5mA (Buffer 1, 2, 9, 10)
I
V =0V
- 0.08 0.15
V
Output Swing Low
OL
V
L
I =10mA(Buffer 3, 4,..., 7, 8)
I
V =1V
- 1.02 1.05 V
L
I =
5
-
mA (Buffer 1, 2, 9, 10)
I
V =10V
9.85 9.92 -
V
Output Swing High
OH
V
L
I =
10
-
mA (Buffer 3, 4,..., 7,
8)
I
V =9V
8.95 8.98 -
V
OL
V
L
I =10mA
I
V =5V
- 5.02 5.04 V
Output Swing
(Buffer 3, 4,..., 7, 8)
OH
V
L
I =
10
-
mA
I
V =5V
4.96 4.98 -
V
OL
V
L
I =50mA
I
V =5V
- 5.03 5.05 V
Output Swing (COM)
OH
V
L
I =
50
-
mA
I
V =5V
4.95 4.97 -
V
(Buffer 1~10 )
-
+70 - mA
Short Circuit Current
SC
I
(Com Buffer)
-
+180
-
mA
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