Datasheet

9
LT1028/LT1128
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
LT1128
Total Harmonic Distortion vs
Closed-Loop Gain
Common-Mode Limit Over
Temperature
LT1028
Total Harmonic Distortion vs
Frequency and Load Resistance
FREQUENCY (Hz)
10

80
100
120
10k 1M
LT1028/1128 • TPC38
60
40
100 1k
100k 10M
20
0
COMMON-MODE REJECTION RATIO (dB)
140
V
S
= ±15V
T
A
= 25°C
LT1128 LT1028
Common-Mode Rejection Ratio
vs Frequency
Power Supply Rejection Ratio
vs Frequency
FREQUENCY (Hz)
10k
0.1
1.0
10
100k 1M
LT1028/1128 • TPC42
NOISE VOLTAGE DENSITY (nV/√Hz)
High Frequency Voltage Noise
vs Frequency
LT1028
Total Harmonic Distortion vs
Closed-Loop Gain
FREQUENCY (Hz)
0.1
POWER SUPPLY REJECTION RATIO (dB)
80
100
120
10M
LT1028/1128 • TPC39
60
40
0
10
1k
100k
20
160
140
1M
1
100
10k
V
S
= ±15V
T
A
= 25°C
NEGATIVE 
SUPPLY
POSITIVE
SUPPLY
LT1128
Total Harmonic Distortion vs
Frequency and Load Resistance
TEMPERATURE (°C)
–50
V
–
COMMON-MODE LIMIT (V)
REFERRED TO POWER SUPPLY
1
3
4
V
+
–3
0
50
75
LT1028/1128 • TPC37
2
–2
–1
–4
–25
25
100
125
V
S
= ±5V
V
S
= ±5V TO ±15V
V
S
= ±15V
CLOSED LOOP GAIN
0.001
TOTAL HARMONIC DISTORTION (%)
0.01
10 1k 10k 100k
LT1028/1128 • TPC41
0.0001
100
0.1
V
O
= 20V
P-P

f = 1kHz
V
S
= ±15V
T
A
= 25°C
R
L
= 10k
NON-INVERTING
GAIN
INVERTING
GAIN
MEASURED
EXTRAPOLATED
CLOSED LOOP GAIN
0.001
TOTAL HARMONIC DISTORTION (%)
0.01
10 1k 10k 100k
LT1028/1128 • TPC44
0.0001
100
0.1
V
O
= 20V
P-P

f = 1kHz
V
S
= ±15V
T
A
= 25°C
R
L
= 10k
NON-INVERTING
GAIN
INVERTING
GAIN
MEASURED
EXTRAPOLATED
FREQUENCY (kHz)
1
0.001
TOTAL HARMONIC DISTORTION (%)
0.01
0.1
10 100
LT1028/1128 • TPC40
A
V
= +1000
R
L
= 600Ω
A
V
= +1000
R
L
= 2k
A
V
= –1000
R
L
= 2k
V
O
= 20V
P-P

V
S
= ±15V
T
A
= 25°C
A
V
= +1000
R
L
= 600Ω
FREQUENCY (kHz)
1.0
0.001
TOTAL HARMONIC DISTORTION (%)
0.1
1.0
10 100
LT1028/1128 • TPC43
0.01
A
V
= +1000
R
L
= 600Ω
A
V
= –1000
R
L
= 2k
V
O
= 20V
P-P

V
S
= ±15V
T
A
= 25°C
A
V
= +1000
R
L
= 600Ω
A
V
= +1000
R
L
= 2k