Datasheet

7
LT1078/LT1079
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
89
120
109
85
47
4
3
V
S
= 5V, 0V
V
CM
= 0.1V
120 LT1078'S
70 LT1079'S
520 OP AMPS