Datasheet

7
LT1028/LT1128
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
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
LOAD RESISTANCE (kΩ)
0.1
1
VOLTAGE GAIN (V/µV)
10
100
110
LT1028/1128 • TPC26
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
LT1028/1128 • TPC27
15
10
LT1128 LT1028
V
S
= ±15V
T
A
= 25°C
R
L
= 2k
Maximum Undistorted Output
vs Frequency
LT1128
Capacitance Load Handling
FREQUENCY (Hz)
10
VOLTAGE GAIN (dB)
20
40
50
70
10k 1M 10M 100M
LT1028/1128 • TPC20
–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
(
DEGREES
)
LT1028
Capacitance Load Handling
FREQUENCY (Hz)
0.01
–20
VOLTAGE GAIN (dB)
160
LT1028/1128 • TPC19
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
CAPACITIVE LOAD (pF)
10
40
OVERSHOOT (%)
50
60
70
80
100 1000 10000
LT1028/1128 • TPC 24
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
FREQUENCY (Hz)
10
VOLTAGE GAIN (dB)
20
40
50
70
10k 1M 10M 100M
LT1028/1128 • TPC23
–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 (DEGREES)
FREQUENCY (Hz)
0.1
0.001
GAIN ERROR (%)
0.01
0.1
1
1 100
LT1028/1128 • TPC22

LT1128
LT1028
TYPICAL
PRECISION
OP AMP
GAIN ERROR =
CLOSED-LOOP GAIN
OPEN-LOOP GAIN
10
SUPPLY VOLTAGE (V)
±5
1
10
100
±10
±15
LT`1028/1128 • TPC25
VOLTAGE GAIN (V/µV)
0
±20
T
A
= 25°C
R
L
= 2k
R
L
= 600Ω
CAPACITIVE LOAD (pF)
10
40
OVERSHOOT (%)
50
60
70
80
100 1000 10000
LT1028/1128 • TPC21
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
