MPSA18
NOISE CHARACTERISTICS
(VCE = 5.0 Vdc, TA = 25°C)
NOISE VOLTAGE
30
20
30
BANDWIDTH = 1.0 Hz
BANDWIDTH = 1.0 Hz
R ≈ 0
20
I
C
= 10 mA
R ≈ 0
S
S
f = 10 Hz
10 kHz
3.0 mA
1.0 mA
10
7.0
5.0
10
7.0
5.0
100 Hz
1.0 kHz
300 mA
100 kHz
5.0
3.0
3.0
0.01 0.02
10 20 50 100 200 500 1ꢀk 2ꢀk 5ꢀk 10ꢀk 20ꢀk 50ꢀk 100ꢀk
f, FREQUENCY (Hz)
0.05 0.1
0.2
0.5 1.0
2.0
10
I , COLLECTOR CURRENT (mA)
C
Figure 2. Effects of Frequency
Figure 3. Effects of Collector Current
10
20
16
BANDWIDTH = 1.0 Hz
7.0
5.0
I
C
= 10 mA
3.0
2.0
BANDWIDTH = 10 Hz to 15.7 kHz
3.0 mA
1.0 mA
12
8.0
4.0
0
1.0
0.7
0.5
I
C
= 1.0 mA
500 mA
100 mA
10 mA
300 mA
100 mA
30 mA
0.3
0.2
10 mA
R ≈ 0
S
0.1
10 20 50 100 200 500 1ꢀk 2ꢀk 5ꢀk 10ꢀk 20ꢀk 50ꢀk 100ꢀk
f, FREQUENCY (Hz)
10 20
50 100 200 500 1ꢀk 2ꢀk
5ꢀk 10ꢀk 20ꢀk 50ꢀk 100ꢀk
R , SOURCE RESISTANCE (OHMS)
S
Figure 4. Noise Current
Figure 5. Wideband Noise Figure
100 Hz NOISE DATA
300
200
20
BANDWIDTH = 1.0 Hz
I = 10 mA
C
3.0 mA
16
12
I
C
= 10 mA
100 mA
3.0 mA
1.0 mA
100
70
1.0 mA
50
30
20
300 mA
300 mA
8.0
30 mA
100 mA
30 mA
10
10 mA
4.0
0
7.0
5.0
10 mA
BANDWIDTH = 1.0 Hz
10 20 50 100 200 500 1ꢀk 2ꢀk 5ꢀk 10ꢀk 20ꢀk 50ꢀk 100ꢀk
3.0
10 20
50 100 200 500 1ꢀk 2ꢀk 5ꢀk 10ꢀk 20ꢀk 50ꢀk 100ꢀk
R , SOURCE RESISTANCE (OHMS)
S
R , SOURCE RESISTANCE (OHMS)
S
Figure 6. Total Noise Voltage
Figure 7. Noise Figure
http://onsemi.com
3
ONSEMI [ ONSEMI ]
