LT1028_15 Datasheet, PDF (6/28 Pages) Linear Technology – Ultralow Noise Precision High Speed Op Amps

LT1028/LT1128
Typical Performance Characteristics
10Hz Voltage Noise Distribution
180
160
158
148
140
120
V_S = ±15V
T_A = 25°C
500 UNITS
MEASURED
FROM 4 RUNS
100
80
70
60
57
40
20
0
0.6
28
8
74232 _{2 1 2 3 2 1 1 1}
0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2
VOLTAGE NOISE DENSITY (nV/√Hz)
1028 G01
Total Noise vs Matched Source
Resistance
100
R_{S –}
R_{S +}
10
AT 10Hz
AT 1kHz
1
2 R_S NOISE ONLY
0.1
1
V_S = ±15V
T_A = 25°C
3 10 30 100 300 1k 3k 10k
MATCHED SOURCE RESISTANCE (Ω)
1028 G04
Wideband Noise, DC to 20kHz
Wideband Voltage Noise
(0.1Hz to Frequency Indicated)
10 _{VS = ±15V}
T_A = 25°C
1
1028 G02
VERTICAL SCALE = 0.5µV/DIV
HORIZONTAL SCALE = 0.5ms/DIV
Total Noise vs Unmatched Source
Resistance
100
R_S
10
AT 10Hz
AT 1kHz
1
2 R_S NOISE ONLY
0.1
1
V_S = ±15V
T_A = 25°C
3 10 30 100 300 1k 3k 10k
UNMATCHED SOURCE RESISTANCE (Ω)
1028 G05
0.1
0.01
100
1k
10k 100k 1M 10M
BANDWIDTH (Hz)
1028 G03
Current Noise Spectrum
100
10 ^MAXIMUM
TYPICAL
1
1/f CORNER = 800Hz
1/f CORNER = 250Hz
0.1
10
100
1k
FREQUENCY (Hz)
10k
1028 G06
0.1Hz to 10Hz Voltage Noise
V_S = ±15V
T_A = 25°C
0.01Hz to 1Hz Voltage Noise
V_S = ±15V
T_A = 25°C
10nV
10nV
0
2
4
6
8
10
TIME (SEC)
1028 G07
0
20
40
60
80 100
TIME (SEC)
1028 G08
6
For more information www.linear.com/LT1028
Voltage Noise vs Temperature
2.0
V_S = ±15V
1.6
1.2
AT 10Hz
0.8
AT 1kHz
O.4
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1028 G09
1028fc