Datasheet

7
LT1078/LT1079
10789fe
TIME (SEC)
0
NOISE VOLTAGE (0.4μV/DIV)
8
LT1078/79 • TPC04
2
4
6
10
CHANNEL A
CHANNEL B
T
A
= 25°C
V
S
= ±2.5V
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Input Bias Current
vs Common Mode Voltage
Input Bias and Offset Currents
vs TemperatureSupply Current vs Temperature
TEMPERATURE (°C)
–50
SUPPLY CURRENT PER AMPLIFIER (μA)
55
50
45
40
35
30
25
25 75
LT1078/79 • TPC01
–25 0
50 100 125
V
S
= ±15V
V
S
= 5V, 0V
TEMPERATURE (°C)
–50
BIAS CURRENT (nA) OFFSET CURRENT (pA)
100
50
0
–5
–6
–7
0
50
75
LT1078/79 • TPC02
–25
25
100
125
I
OS
I
B
V
S
= 5V, 0V TO ±15V
COMMON MODE VOLTAGE (V)
–1
INPUT BIAS CURRENT (nA)
0
–2
–4
–6
–8
–10
–12
0123
LT1078/79 • TPC03
4
T
A
= 125°C
T
A
= –55°C
V
S
= 5V, 0V
T
A
= 25°C
0.1Hz to 10Hz Noise 0.01Hz to 10Hz Noise Noise Spectrum
TIME (SEC)
0
NOISE VOLTAGE (0.4μV/DIV)
80
LT1078/79 • TPC05
20
40
60
100
CHANNEL B
T
A
= 25°C
V
S
= ±2.5V
CHANNEL A
0.4μV
FREQUENCY (Hz)
0.1 1 100
10
VOLTAGE NOISE DENSITY (nV/√Hz)
CURRENT NOISE DENSITY (fA/√Hz)
100
30
1000
300
10 1000
LT1078/79 • TPC06
CURRENT
NOISE
VOLTAGE
NOISE
1/f CORNER
0.7Hz
T
A
= 25°C
V
S
= ±2.5V
(AT V
S
= ±15V
VOLTAGE NOISE
IS 4% LESS
CURRENT NOISE
IS UNCHANGED)
10Hz Voltage Noise Distribution
Distribution of Offset Voltage Drift
with Temperature (In All Packages
Except Surface Mount)
Long Term Stability of Two
Representative Units (LT1078)
VOLTAGE NOISE DENSITY (nV/√Hz)
25
LT1078/79 • TPC07
30
35 40
PERCENT OF UNITS
35
30
25
20
15
10
5
0
T
A
= 25°C
V
S
= ± 2.5V
329 OP AMPS TESTED
FROM THREE RUNS
106 LT1078'S
45 LT1079'S
TIME (MONTHS)
0
OFFSET VOLTAGE CHANGE (μV)
1234
LT078/79 • TPC09
5
15
10
5
0
–5
–10
–15
T
A
= 25°C, V
S
= 5V, 0V
V
CM
= 0.1V
1A
2B
1B
2A
OFFSET VOLTAGE DRIFT WITH TEMPERATURE (μV/°C)
PERCENT OF UNITS
25
20
15
10
5
0
LT1078/79 • TPC08
–2 –1 0 1 2
1111
3
5
7
44
120
109
85
47
4
3
89
V
S
= 5V, 0V
V
CM
= 0.1V
120 LT1078'S
70 LT1079'S
520 OP AMPS