Datasheet

LT1028/LT1128
8
1028fb
Typical perForMance characTerisTics
Gain Error vs Frequency
Closed-Loop Gain = 1000
LT1128
Gain Phase vs Frequency
LT1028
Gain, Phase vs Frequency
Voltage Gain vs Frequency
Voltage Gain vs Supply Voltage Voltage Gain vs Load Resistance
Maximum Undistorted Output
vs Frequency
LT1128
Capacitance Load Handling
LT1028
Capacitance Load Handling
FREQUENCY (Hz)
0.01
–20
VOLTAGE GAIN (dB)
160
1028 G19
140
120
100
80
60
40
20
0
0.1 1 10 100 1k 10k 100k 1M 10M 100M
LT1128 LT1028
V
S
= ±15V
T
A
= 25°C
R
L
= 2k
FREQUENCY (Hz)
10
VOLTAGE GAIN (dB)
20
40
50
70
10k 1M 10M 100M
1028 G20
–10
100k
60
30
0
V
S
= ±15V
T
A
= 25°C
C
L
= 10pF
GAIN
PHASE
10
20
40
50
70
–10
60
30
0
PHASE MARGIN (DEG)
CAPACITIVE LOAD (pF)
10
40
OVERSHOOT (%)
50
60
70
80
100 1000 10000
1028 G21
30
20
10
0
V
S
= ±15V
T
A
= 25°C
–
+
C
L
2k
30pF
R
S
A
V
= –1, R
S
= 2k
A
V
= –100
R
S
= 20Ω
A
V
= –10
R
S
= 200Ω
FREQUENCY (Hz)
0.1
0.001
GAIN ERROR (%)
0.01
0.1
1
1 100
1028 G22
LT1128
LT1028
TYPICAL
PRECISION
OP AMP
GAIN ERROR =
CLOSED-LOOP GAIN
OPEN-LOOP GAIN
10
FREQUENCY (Hz)
10
VOLTAGE GAIN (dB)
20
40
50
70
10k 1M 10M 100M
1028 G23
–10
100k
60
30
0
V
S
= ±15V
T
A
= 25°C
C
L
= 10pF
GAIN
PHASE
10
20
40
50
70
–10
60
30
0
PHASE MARGIN (DEG)
CAPACITIVE LOAD (pF)
10
40
OVERSHOOT (%)
50
60
70
80
100 1000 10000
1028 G24
30
20
10
0
V
S
= ±15V
T
A
= 25°C
V
O
= 10mV
P-P
A
V
= –1, R
S
= 2k
–
+
C
L
2k
30pF
R
S
A
V
= –10
R
S
= 200Ω
A
V
= –100, R
S
= 20Ω
SUPPLY VOLTAGE (V)
5
1
10
100
10
15
1028 G25
VOLTAGE GAIN (V/µV)
0
20
T
A
= 25°C
R
L
= 2k
R
L
= 600Ω
LOAD RESISTANCE (kΩ)
0.1
1
VOLTAGE GAIN (V/µV)
10
100
1 10
1028 G26
V
S
= ±15V
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
I
LMAX
= 35mA AT –55°C
= 27mA AT 25°C
= 16mA AT 125°C
FREQUENCY (Hz)
10k
5
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
20
25
30
100k 1M 10M
1028 G27
15
10
LT1128 LT1028
V
S
= ±15V
T
A
= 25°C
R
L
= 2k