Datasheet

LT1028/LT1128
6
1028fb
Typical perForMance characTerisTics
10Hz Voltage Noise Distribution
Total Noise vs Matched Source
Resistance
Total Noise vs Unmatched Source
Resistance Current Noise Spectrum
0.01Hz to 1Hz Voltage Noise
Voltage Noise vs Temperature
0.1Hz to 10Hz Voltage Noise
Wideband Noise, DC to 20kHz
Wideband Voltage Noise
(0.1Hz to Frequency Indicated)
0.6
0
NUMBER OF UNITS
20
60
80
100
1.0
1.4
1.8
180
1028 G01
40
0.8 1.2
120
140
160
1.6 2.0 2.2
8
70
148
158
57
28
7
4
2
3
2
2 2
1
3
2
1 1
1
V
S
= ±15V
T
A
= 25°C
500 UNITS
MEASURED
FROM 4 RUNS
VOLTAGE NOISE DENSITY (nV/√Hz)
1028 G02
VERTICAL SCALE = 0.5µV/DIV
HORIZONTAL SCALE = 0.5ms/DIV
BANDWIDTH (Hz)
100
RMS VOLTAGE NOISE (µV)
0.1
1
100k 1M 10M
1028 G03
0.01
10
10k1k
V
S
= ±15V
T
A
= 25°C
MATCHED SOURCE RESISTANCE (Ω)
1
TOTAL NOISE DENSITY (nV/√Hz)
10
100
3 1k 10k
1028 G04
1
0.1
V
S
= ±15V
T
A
= 25°C
10 30 100 300 3k
AT 10Hz
2 R
S
NOISE ONLY
AT 1kHz
–
+
R
S
R
S
UNMATCHED SOURCE RESISTANCE (Ω)
1
TOTAL NOISE DENSITY (nV/√Hz)
10
100
3 1k 10k
1028 G05
1
0.1
V
S
= ±15V
T
A
= 25°C
10 30 100 300 3k
AT 10Hz
2 R
S
NOISE ONLY
AT 1kHz
R
S
FREQUENCY (Hz)
10
0.1
CURRENT NOISE DENSITY (pA/√Hz)
1
10
100
100 1k 10k
1028 G06
MAXIMUM
TYPICAL
1/f CORNER = 800Hz
1/f CORNER = 250Hz
TIME (SEC)
0 8
1028 G07
2
4
6
10
10nV
V
S
= ±15V
T
A
= 25°C
TIME (SEC)
0 80
1028 G08
20
40
60
100
10nV
V
S
= ±15V
T
A
= 25°C
TEMPERATURE (°C)
–50
0
RMS VOLTAGE DENSITY (nV/√Hz)
0.8
2.0
0
50
75
1028 G09
O.4
1.6
1.2
–25
25
100
125
V
S
= ±15V
AT 10Hz
AT 1kHz