Datasheet
LT1490A/LT1491A
9
14901afd
TYPICAL PERFORMANCE CHARACTERISTICS
Gain Bandwidth Product and
Phase Margin vs Supply Voltage CMRR vs Frequency PSRR vs Frequency
Gain Bandwidth Product and
Phase Margin vs Load Resistance Channel Separation vs Frequency Output Impedance vs Frequency
Gain and Phase Shift
vs Frequency
Gain Bandwidth Product
vs Temperature Slew Rate vs Temperature
FREQUENCY (kHz)
1
10
GAIN (dB)
PHASE SHIFT (DEG)
20
30
40
50
10 100 1000
1490A G10
0
–10
–20
–30
60
70
–20
0
20
40
60
–40
–60
–80
–100
80
100
V
S
= ±2.5V
PHASE
GAIN
TEMPERATURE (°C)
–50
GAIN BANDWIDTH PRODUCT (kHz)
120
140
160
260
200
0
50
75
1490A G11
100
220
240
180
–25
25
100
125
V
S
= ±15V
V
S
= ±1.5V
f = 1kHz
TEMPERATURE (°C)
–50
SLEW RATE (V/µs)
0
50
75
1490A G12
0.04
0.06
0.10
0.12
0.08
–25
25
100
125
RISING, V
S
= ±15V
RISING, V
S
= ±1.5V
FALLING, V
S
= ±1.5V
FALLING, V
S
= ±15V
TOTAL SUPPLY VOLTAGE (V)
0
150
GAIN BANDWIDTH PRODUCT (kHz)
PHASE MARGIN (DEG)
160
180
190
200
250
220
10
20
25 45
1490A G13
170
230
240
210
10
30
60
20
50
40
515
30
35
40
R
L
= 10k
f = 1kHz
PHASE MARGIN
GAIN BANDWIDTH
FREQUENCY (kHz)
1
COMMON MODE REJECTION RATIO (dB)
10
120
100
80
60
40
20
100
1490A G14
V
S
= ±15V
V
S
= ±1.5V
FREQUENCY (kHz)
1
–20
POWER SUPPLY REJECTION RATIO (dB)
0
20
40
60
10 100
1490A G15
–10
10
30
50
70
80
V
S
= ±2.5V
POSITIVE SUPPLY
NEGATIVE SUPPLY
LOAD RESISTANCE (k)
1
50
GAIN BANDWIDTH PRODUCT (kHz)
PHASE MARGIN (DEG)
100
150
200
250
350
10 100
1490A G16
300
20
30
40
50
60
80
70
V
S
= ±2.5V
A
V
= –1
R
F
= R
G
= 100k
f = 1kHz
PHASE MARGIN
GAIN BANDWIDTH
FREQUENCY (kHz)
0.1
90
CHANNEL SEPARATION (dB)
100
110
120
130
1 10 100
1490A G17
80
70
50
40
60
V
S
= ±15V
FREQUENCY (kHz)
0.1
OUTPUT IMPEDANCE ()
100
1k
10k
1 10 100
1490A G18
10
1
0.1
V
S
= ±2.5V
A
V
= 100
A
V
= 10
A
V
= 1