7
LT1078/LT1079
10789fe
TIME (SEC)
0
NOISE
VOLTAGE
(0.4
μ
V/DIV)
8
LT1078/79 TPC04
2
4
6
10
CHANNEL A
CHANNEL B
TA = 25°C
VS = ±2.5V
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Input Bias Current
vs Common Mode Voltage
Input Bias and Offset Currents
vs Temperature
Supply Current vs Temperature
TEMPERATURE (
°C)
–50
SUPPLY
CURRENT
PER
AMPLIFIER
(
μ
A)
55
50
45
40
35
30
25
75
LT1078/79 TPC01
–25
0
50
100
125
VS = ±15V
VS = 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
IOS
IB
VS = 5V, 0V TO ±15V
COMMON MODE VOLTAGE (V)
–1
INPUT
BIAS
CURRENT
(nA)
0
–2
–4
–6
–8
–10
–12
012
3
LT1078/79 TPC03
4
TA = 125°C
TA = –55°C
VS = 5V, 0V
TA = 25°C
0.1Hz to 10Hz Noise
0.01Hz to 10Hz Noise
Noise Spectrum
TIME (SEC)
0
NOISE
VOLTAGE
(0.4
μ
V/DIV)
80
LT1078/79 TPC05
20
40
60
100
CHANNEL B
TA = 25°C
VS = ±2.5V
CHANNEL A
0.4
μV
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
TA = 25°C
VS = ±2.5V
(AT VS = ±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
TA = 25°C
VS = ± 2.5V
329 OP AMPS TESTED
FROM THREE RUNS
106 LT1078'S
45 LT1079'S
TIME (MONTHS)
0
OFFSET
VOLTAGE
CHANGE
(
μ
V)
123
4
LT078/79 TPC09
5
15
10
5
0
–5
–10
–15
TA = 25°C, VS = 5V, 0V
VCM = 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
11
1
3 5
7
44
120
109
85
47
4 3
89
VS = 5V, 0V
VCM = 0.1V
120 LT1078'S
70 LT1079'S
520 OP AMPS