LT1028_15 Datasheet, PDF (7/28 Pages) Linear Technology – Ultralow Noise Precision High Speed Op Amps

Typical Performance Characteristics
LT1028/LT1128
Distribution of Input Offset
Voltage
20
V_S = ±15V
18 T_A = 25°C
16
800 UNITS TESTED
FROM FOUR RUNS
14
12
10
8
6
4
2
0
–50 –40 –30 –20 –10 0 10 20 30 40 50
OFFSET VOLTAGE (µV)
1028 G10
Warm-Up Drift
24
V_S = ±15V
T_A = 25°C
20
16
METAL CAN (H) PACKAGE
12
8
4
DUAL-IN-LINE PACKAGE
PLASTIC (N) OR CERDIP (J)
0
0
1
2
3
4
5
TIME AFTER POWER ON (MINUTES)
1028 G13
Voltage Noise vs Supply Voltage
1.5
T_A = 25°C
1.25
AT 10Hz
1.0
AT 1kHz
0.75
0.5
0
±5
±10
±15
SUPPLY VOLTAGE (V)
±20
1028 G16
Offset Voltage Drift with Temperature
of Representative Units
50
40 ^{VS = ±15V}
30
20
10
0
–10
–20
–30
–40
–50
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1028 G11
Input Bias and Offset Currents
Over Temperature
60
V_S = ±15V
V_CM = 0V
50
40
30
BIAS CURRENT
20
10
OFFSET CURRENT
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1028 G14
Supply Current vs Temperature
10
9
8
V_S = ±15V
7
6
V_S = ±5V
5
4
3
2
1
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1028 G17
For more information www.linear.com/LT1028
Long-Term Stability of Five
Representative Units
10
V_S = ±15V
8 T_A = 25°C
6 ^{t = 0 AFTER 1 DAY PRE-WARM UP}
4
2
0
–2
–4
–6
–8
–10
0
1
2
3
4
TIME (MONTHS)
5
1028 G12
Bias Current Over the Common
Mode Range
100
80
R_CM
=
20V
65nA
ª 300MΩ
V_S = ±15V
T_A = 25°C
60 _{POSITIVE INPUT CURRENT}
40 ^{(UNDERCANCELLED) DEVICE}
20
0
–20
–40
NEGATIVE INPUT CURRENT
–60
(OVERCANCELLED) DEVICE
–80
–15 –10 –5 0
5 10 15
COMMON MODE INPUT VOLTAGE (V)
1028 G15
Output Short-Circuit Current
vs Time
50
40
–50°C
V_S = ±15V
25°C
30
125°C
20
10
0
–10
–20
125°C
–30
25°C
–40
–50°C
–50
0
1
2
3
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
1028 G18
1028fc
7