Datasheet

6
LT1028/LT1128
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Supply Current vs Temperature
SUPPLY VOLTAGE (V)
0
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
1.0
1.25
±15
LT1028/1128 • TPC16
0.75
0.5
±5 ±10
±20
1.5
T
A
= 25°C
AT 10Hz
AT 1kHz
Voltage Noise vs Supply Voltage
TIME AFTER POWER ON (MINUTES)
0
0
CHANGE IN OFFSET VOLTAGE (µV)
4
8
12
16
20
24
1234
LT1028/1128 • TPC13
5
V
S
= ±15V
T
A
= 25°C
METAL CAN (H) PACKAGE
DUAL-IN-LINE PACKAGE
PLASTIC (N) OR CERDIP (J)
TEMPERATURE (°C)
–50
0
SUPPLY CURRENT (mA)
1
3
4
5
10
7
0
50
75
LT1028/1128 • TPC17
2
8
9
6
–25
25
100
125
V
S
= ±15V
V
S
= ±5V
Bias Current Over the Common-
Mode RangeWarm-Up Drift
Output Short-Circuit Current
vs Time
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
0
–50
SINKING
–40
–20
–10
0
50
20
2
LT1028/1128 • TPC18
–30
30
40
10
1
3
SHORT-CIRCUIT CURRENT (mA)
SOURCING
V
S
= ±15V
–50°C
25°C
125°C
–50°C
125°C
25°C
Distribution of Input Offset
Voltage
Input Bias and Offset Currents
Over Temperature
TEMPERATURE (˚C)
–50
INPUT BIAS AND OFFSET CURRENTS (nA)
40
50
60
25 75
LT1028/1128 • TPC14
30
20
–25 0
50 100 125
10
0
V
S
= ±15V
V
CM
= 0V
BIAS CURRENT
OFFSET CURRENT
TEMPERATURE (°C)
–50
–50
OFFSET VOLTAGE (µV)
–40
–20
–10
0
50
20
0
50
75
LT1028/1128 • TPC11
–30
30
40
10
–25
25
100
125
V
S
= ±15V
Long-Term Stability of Five
Representative Units
TIME (MONTHS)
0
OFFSET VOLTAGE CHANGE (µV)
2
6
10
4
LT1028/1128 • TPC12
–2
–6
–10
1
2
3
5
0
4
8
–4
–8
V
S
= ±15V
T
A
= 25°C
t = 0 AFTER 1 DAY PRE-WARM UP
Offset Voltage Drift with
Temperature of Representative Units
COMMON-MODE INPUT VOLTAGE (V)
–15
–80
INPUT BIAS CURRENT (nA)
–60
–20
0
20
–5
5
15
100
LT1028/1128 • TPC15
–40
–10 0
40
60
80
10
R
CM
=
20V
65nA
≈ 300MΩ
V
S
= ±15V
T
A
= 25°C
POSITIVE INPUT CURRENT
(UNDERCANCELLED) DEVICE
NEGATIVE INPUT CURRENT
(OVERCANCELLED) DEVICE
OFFSET VOLTAGE (µV)
–50
UNITS (%)
12
16
20
30
LT1028/1128 • TPC10
8
4
0
–30
–10
10
50
10
14
18
6
2
20
–40
–20
0
40
V
S
= ±15V
T
A
= 25°C
800 UNITS TESTED
FROM FOUR RUNS