Datasheet

7
LT1490/LT1491
Open-Loop Gain Large-Signal Response Small-Signal Response
OUTPUT VOLTAGE (5V/DIV)
–10V 0V 10V 1490/91 G25
CHANGE IN INPUT OFFSET VOLTAGE
(100µV/DIV)
V
S
= ±15V
1490/91 G26
1490/91 G27
R
L
= 2k
R
L
= 50k
Undistorted Output Swing
vs Frequency
Settling Time to 0.1%
vs Output Step
Capacitive Load Handling,
Overshoot vs Capacitive Load
Total Harmonic Distortion + Noise
vs Frequency
Total Harmonic Distortion + Noise
vs Load Resistance
FREQUENCY (kHz)
0.1
20
OUTPUT SWING (V
P-P
)
25
30
35
1 10 100
1490/91 G19
15
10
5
0
DISTORTION ≤1%
V
S
= ±15V
V
S
= ±2.5V
SETTLING TIME (µs)
0
–10
OUTPUT STEP (V)
–8
–4
–2
0
10
4
40
80
100
1490/91 F20
–6
6
8
2
20 60
120
140
160
V
S
= ±15V
A
V
= –1
A
V
= –1
A
V
= 1
A
V
= 1
FREQUENCY (kHz)
0.01
THD + NOISE (%)
0.1
1
10
0.01 1 10
1490/91 G22
0.001
0.1
V
S
= 3V, 0V
V
OUT
= 2V
P-P
V
CM
= 1.2V
R
L
= 50k
A
V
= –1
A
V
= 1
LOAD RESISTANCE TO GROUND (kΩ)
0.01
THD + NOISE (%)
0.1
1
10
0.1 10 100
1490/91 G23
0.001
1
V
S
= 3V TOTAL
A
V
= 1
V
IN
= 2V
P-P
AT 1kHz
V
S
= ±1.5V
V
IN
= ±1V
V
S
= 3V, 0V
V
IN
= 0.5V TO 2.5V
V
S
= 3V, 0V
V
IN
= 0.2V TO 2.2V
OUTPUT VOLTAGE (V
P-P
)
0.01
THD + NOISE (%)
1
10
023
1490/91 G24
0.001
1
0.1
R
L
= 10k
V
CM
= HALF SUPPLY
f = 1kHz
A
V
= 1
V
S
= 3V, 0V
A
V
= –1
V
S
= 3V, 0V
A
V
= –1
V
S
= ±1.5V
A
V
= 1
V
S
= ±1.5V
Total Harmonic Distortion + Noise
vs Output Voltage
R
L
= 10k
V
S
= ±15V
A
V
= –1
V
S
= ±15V
A
V
= 1
CAPACITIVE LOAD (pF)
20
OVERSHOOT (%)
40
60
50
80
100
10
30
70
90
10 100 1000 10000
1490/91 G21
0
V
S
= 5V, 0V
I
SOURCE
= 170µA
A
V
= 1 A
V
= 2 A
V
= 5
A
V
= 10
TYPICAL PERFOR A CE CHARACTERISTICS
UW