Datasheet

Typical Operating Characteristics (continued)
(V
DD
= 19V, GND = 0, V
CM
= V
OUT
= V
DD
/2, T
A
= +25°C, unless otherwise specified.)
0
2
1
4
3
7
6
5
8
-50 0-25 25 50 75 100 125
SUPPLY CURRENT
vs. TEMPERATURE
MAX9650 toc04
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
I
OUT
(500mA/div)
V
OUT
(125mV/div)
LOAD TRANSIENT
SOURCING
MAX9650 toc05
TIME (1μs/div)
0.1A RESPONSE
1A RESPONSE
0.5A RESPONSE
I
OUT
(500mA/div)
V
OUT
(125mV/div)
LOAD TRANSIENT
SINKING
MAX9650 toc06
TIME (1μs/div)
0.1A RESPONSE
1A RESPONSE
0.5A RESPONSE
100ms/div
STARTUP WAVEFORM
I
DD
10mA/div
V
DD
10V/div
V
IN
5V/div
V
OUT
5V/div
MAX9650 toc07
2μs/div
MAX9650 STEP RESPONSE
WITH VARIOUS C
L
V
OUT
5V/div
V
OUT
5V/div
V
OUT
5V/div
V
OUT
5V/div
MAX9650 toc08
C
L
= 10pF
C
L
= 2200pF
C
L
= 0.01μF
C
L
= 0.022μF
OPEN-LOOP GAIN AND PHASE
vs. FREQUENCY
MAX9650 toc09
FREQUENCY (Hz)
GAIN (dB)
10E+6
1E+6
10E+3
100E+31E+3
100E+0
-60
-40
-20
0
20
40
60
80
100
120
-80
10E+0
100E+6
GAIN
PHASE
C
L
= 100pF
-180
-120
-60
0
60
120
180
240
300
360
-240
PHASE (DEG)
CLOSED-LOOP SMALL-SIGNAL FREQUENCY
RESPONSE FOR VARIOUS C
L
MAX9650 toc10
FREQUENCY (MHz)
VOLTAGE GAIN (dB)
1010.1
-10
-5
0
5
10
15
20
-15
0.01 100
C
L
= 0.1μF
C
L
= 0.01μF
C
L
= 100pF
C
L
= 56pF
C
L
= 10pF
C
L
= 560pF
C
L
= 0.001μF
C
L
= 0.0022μF
High-Current VCOM Drive Op Amps
for TFT LCDs
4 Maxim Integrated
MAX9650/MAX9651
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX9650 toc11
FREQUENCY (Hz)
GAIN (dB)
10E+61E+6
-6
-5
-4
-3
-2
-1
0
1
2
3
-7
100E+3 100E+6
V
OUT
= 100mV
P-P
R
L
= 10kΩ TO V
DD
/2
SMALL-SIGNAL GAIN vs. FREQUENCY
WITH VARIOUS C
L
MAX9650 toc12
FREQUENCY (Hz)
GAIN (dB)
10E+61E+6
-20
-15
-10
-5
0
5
10
15
20
-25
100E+3 100E+6
10,000pF
1000pF
100pF
10pF
V
OUT
= 100mV
P-P
R
L
= 10kΩ TO V
DD
/2