LT1991
U W
TYPICAL PERFOR A CE CHARACTERISTICS (Difference Amplifier Configuration)
Bandwidth vs Gain
CMRR vs Frequency
PSRR vs Frequency
120
110
100
90
80
70
60
50
40
30
20
10
0
120
100
80
60
40
20
0
120
110
100
90
80
70
60
50
40
30
20
10
0
V
= 5V, 0V
S
A
V
T
= 5V, 0V
= 25°C
V
T
= 5V, 0V
S
A
S
A
GAIN = 9
GAIN = 1
T
= 25°C
= 25°C
GAIN = 3
GAIN = 9
GAIN = 1
GAIN = 3
10
100
1k
10k
100k
1M
1
2
3
4
5
6
7
8
9
10 11 12 13
10
100
1k
FREQUENCY (Hz)
10k
100k
FREQUENCY (Hz)
GAIN SETTING (V/V)
1991 G11
1991 G12
1991 G10
Output Impedance vs Frequency
CMRR vs Temperature
Gain Error vs Temperature
1000
100
10
0.030
0.025
0.020
0.015
0.010
0.005
0
120
100
80
60
40
20
0
V
T
= 5V, 0V
= 25°C
GAIN = 1
GAIN = 1
S
A
V
S
= ±15V
V
S
= ±15V
GAIN = 9
GAIN = 3
GAIN = 1
1
0.1
0.01
REPRESENTATIVE UNITS
REPRESENTATIVE UNITS
50
TEMPERATURE (°C)
100 125
50
TEMPERATURE (°C)
100 125
–50 –25
0
25
75
–50 –25
0
25
75
1
10
100
1k
10k
100k
FREQUENCY (Hz)
1991 G13
1991 G15
1991 G14
Gain vs Frequency
Gain and Phase vs Frequency
0.01Hz to 1Hz Voltage Noise
2
1
30
20
V
T
= 5V, 0V
V
T
= 5V, 0V
S
A
S
A
V
= ±15V
= 25°C
PHASE
GAIN
S
A
0
= 25°C
= 25°C
T
GAIN = 1
GAIN = 9
GAIN = 3
MEASURED IN G =13
REFERRED TO OP AMP INPUTS
0
–45
–1
–2
–3
–4
–5
–6
–7
–8
10
–90
GAIN = 1
0
–135
–180
–10
–20
0.5
1
10
100
400
1
10
100
600
0
10 20 30 40 50 60 70 80 90 100
FREQUENCY (kHz)
FREQUENCY (kHz)
TIME (s)
1991 G17
1991 G16
1991 G21
1991fb
6
Linear Systems [ Linear Systems ]
