Datasheet

LT1028/LT1128
7
1028fb
Typical perForMance characTerisTics
Supply Current vs TemperatureVoltage Noise vs Supply Voltage
Bias Current Over the Common
Mode RangeWarm-Up Drift
Output Short-Circuit Current
vs Time
Distribution of Input Offset
Voltage
Input Bias and Offset Currents
Over Temperature
Long-Term Stability of Five
Representative Units
Offset Voltage Drift with Temperature
of Representative Units
OFFSET VOLTAGE (µV)
–50
UNITS (%)
12
16
20
30
1028 G10
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
TEMPERATURE (°C)
–50
–50
OFFSET VOLTAGE (µV)
–40
–20
–10
0
50
20
0
50
75
1028 G11
–30
30
40
10
–25
25
100
125
V
S
= ±15V
TIME (MONTHS)
0
OFFSET VOLTAGE CHANGE (µV)
2
6
10
4
1028 G12
–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
TIME AFTER POWER ON (MINUTES)
0
0
CHANGE IN OFFSET VOLTAGE (µV)
4
8
12
16
20
24
1 2 3 4
1028 G13
5
V
S
= ±15V
T
A
= 25°C
METAL CAN (H) PACKAGE
DUAL-IN-LINE PACKAGE
PLASTIC (N) OR CERDIP (J)
TEMPERATURE (°C)
–50
INPUT BIAS AND OFFSET CURRENTS (nA)
40
50
60
25 75
1028 G14
30
20
–25 0
50 100 125
10
0
V
S
= ±15V
V
CM
= 0V
BIAS CURRENT
OFFSET CURRENT
COMMON MODE INPUT VOLTAGE (V)
–15
–80
INPUT BIAS CURRENT (nA)
–60
–20
0
20
–5
5
15
100
1028 G15
–40
–10 0
40
60
80
10
R
CM
=
20V
65nA
ª 300MΩ
V
S
= ±15V
T
A
= 25°C
POSITIVE INPUT CURRENT
(UNDERCANCELLED) DEVICE
NEGATIVE INPUT CURRENT
(OVERCANCELLED) DEVICE
TEMPERATURE (°C)
–50
0
SUPPLY CURRENT (mA)
1
3
4
5
10
7
0
50
75
1028 G17
2
8
9
6
–25
25
100
125
V
S
= ±15V
V
S
= ±5V
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
0
–50
SINKING
–40
–20
–10
0
50
20
2
1028 G18
–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
SUPPLY VOLTAGE (V)
0
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
1.0
1.25
±15
1028 G16
0.75
0.5
±5 ±10
±20
1.5
T
A
= 25°C
AT 10Hz
AT 1kHz