Datasheet

LT1991
8
1991fh
GAIN SETTING (V/V)
1
–3dB BANDWIDTH (kHz)
120
100
80
60
40
20
0
3 5 7 9
1991 G10
11 132 4 6 8 10 12
V
S
= 5V, 0V
T
A
= 25°C
Bandwidth vs Gain CMRR vs Frequency PSRR vs Frequency
Output Impedance vs Frequency CMRR vs Temperature Gain Error vs Temperature
Gain vs Frequency Gain and Phase vs Frequency 0.01Hz to 1Hz Voltage Noise
(Difference Amplifier Configuration)
FREQUENCY (Hz)
CMRR (dB)
120
110
100
90
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
1991 G11
100 100k
V
S
= 5V, 0V
T
A
= 25°C
GAIN = 9
GAIN = 1
GAIN = 3
PSRR (dB)
120
110
100
90
80
70
60
50
40
30
20
10
0
V
S
= 5V, 0V
T
A
= 25°C
GAIN = 9
GAIN = 1
GAIN = 3
FREQUENCY (Hz)
10 1k 10k
1991 G12
100 100k
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
1 100 1k 100k10k
1991 G13
10
1000
100
10
1
0.1
0.01
V
S
= 5V, 0V
T
A
= 25°C
GAIN = 9
GAIN = 1
GAIN = 3
TEMPERATURE (°C)
–50
CMRR (dB)
120
100
80
60
40
20
0
25 75
1991 G14
–25 0
50 100 125
GAIN = 1
V
S
= ±15V
REPRESENTATIVE UNITS
TEMPERATURE (°C)
–50
GAIN ERROR (%)
0.030
0.025
0.020
0.015
0.010
0.005
0
25 75
1991 G15
–25 0
50 100 125
GAIN = 1
V
S
= ±15V
REPRESENTATIVE UNITS
FREQUENCY (kHz)
1
GAIN (dB)
30
20
10
0
–10
–20
10 100
600
1991 G16
GAIN = 9
GAIN = 3
GAIN = 1
V
S
= 5V, 0V
T
A
= 25°C
FREQUENCY (kHz)
1
GAIN (dB)
PHASE (deg)
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
0
–45
–90
–135
–180
10 100
400
1991 G17
0.5
V
S
= 5V, 0V
T
A
= 25°C
GAIN = 1
PHASE
GAIN
V
S
= ±15V
T
A
= 25°C
MEASURED IN G =13
REFERRED TO OP AMP INPUTS
0 10 20 30 40 50 60 70 80 90 100
TIME (s)
OP AMP VOLTAGE NOISE (100nV/DIV)
1991 G21
TYPICAL PERFORMANCE CHARACTERISTICS