Datasheet
LT1678/LT1679
8
sn16789 16789fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
INPUT BIAS CURRENT (nA)
16
14
12
10
8
6
4
2
0
–2
–4
–6
TEMPERATURE (°C)
–50 25 75
16789 G06
–25 0
50 100 125
INPUT BIAS CURRENT (nA)
900
700
500
300
100
–100
–300
–500
–700
–900
16789 G08
COMMON MODE INPUT VOLTAGE (V)
–16 16
–8
0
8
–12 –4 4
12
V
S
= ±15V
V
CM
= 0V
V
CM
= –13.5V
V
CM
= 14.5V
V
CM
= –15.2V
V
CM
= 14.1V
INPUT BIAS CURRENT
V
S
= ±15V
T
A
= 25°C
TIME (min)
0
CHANGE IN OFFSET VOLTAGE (µV)
4
16789 G10
1
2
3
10
8
6
4
2
0
TEMPERATURE (°C)
–55
VOLTAGE OFFSET (µV)
200
100
0
–100
–200
–300
–15
25
45 125
16789 G12
–35 5
65
85
105
V
S
= ±15V
T
A
= 25°C
SO PACKAGE
V
S
= 5V, 0V
V
CM
= 0V
TEMPERATURE (°C)
–50
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
6
5
4
3
2
1
0
50
75
16789 G04
–25
25
100
125
TEMPERATURE (°C)
–50 0 50 75
16789 G07
–25 25 100 125
V
S
= ±15V
V
CM
= 0V
10Hz
1kHz
FREQUENCY (kHz)
0.01
0.1
NOISE VOLTAGE (pA/√Hz)
1
10
0.1 1 10
16789 G05
V
S
= ±15V
T
A
= 25°C
V
CM
= 0V
V
CM
= 14.5V
1400
1200
1000
800
600
400
200
0
INPUT BIAS CURRENT (nA)
V
CM
= –14V
CURRENT OUT OF DUT
V
CM
= 14.7V
CURRENT INTO DUT
V
S
= ±15V
V
CM
– V
+
(V)V
CM
– V
–
(V)
–1.0
OFFSET VOLTAGE (mV)
5
4
3
2
1
0
–1
–2
–3
–4
–5
500
400
300
200
100
0
–100
–200
–300
–400
–500
–0.8 –0.4 V
+
0.4
16789 G09
V
–
1.0
2.0
V
OS
IS REFERRED TO
V
CM
= 0V
V
S
= ±1.5V TO ±15V
T
A
= 25°C
5 TYPICAL PARTS
OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE DRIFT (µV/°C)
–3.0 3.0
PERCENT OF UNITS (%)
30
25
20
15
10
5
0
0
16789 G11
–2.0 2.0
–1.0 1.0
V
S
= 5V, 0V
T
A
= –40°C TO 85°C
111 PARTS (2 LOTS)
Input Bias Current vs Temperature
Input Bias Current Over the
Common Mode Range
Warm-Up Drift vs Time
V
OS
vs Temperature of
Representive Units
Distribution of Input Offset
Voltage Drift (SO-8)
Voltage Noise vs Temperature
Current Noise vs Frequency
Input Bias Current vs Temperature
Offset Voltage Shift vs
Common Mode