MPS6521 (NPN) MPS6523 (PNP)
http://onsemi.com
7
PNP
MPS6523
TYPICAL NOISE CHARACTERISTICS
(V
CE
= − 5.0 Vdc, T
A
= 25°C)
Figure 23. Noise Voltage
f, FREQUENCY (Hz)
5.0
7.0
10
3.0
Figure 24. Noise Current
f, FREQUENCY (Hz)
1.0
10 20 50 100 200 500 1.0k 2.0k 5.0k 10k
1.0
7.0
5.0
3.0
2.0
1.0
0.7
0.5
0.3
0.1
BANDWIDTH = 1.0 Hz
R
S
≈ 0
I
C
= 10 mA
100 mA
e
n
, NOISE VOLTAGE (nV)
I
n
, NOISE CURRENT (pA)
30 mA
BANDWIDTH = 1.0 Hz
R
S
≈∞
I
C
= 1.0 mA
300 mA
100 mA
30 mA
10 mA
10 20 50 100 200 500 1.0k 2.0k 5.0k 10k
2.0
1.0 mA
0.2
300 mA
NOISE FIGURE CONTOURS
(V
CE
= − 5.0 Vdc, T
A
= 25°C)
500k
100
200
500
1.0k
10k
5.0k
20k
50k
100k
200k
2.0k
1.0M
500k
100
200
500
1.0k
10k
5.0k
20k
50k
100k
200k
2.0k
1.0M
Figure 25. Narrow Band, 100 Hz
I
C
, COLLECTOR CURRENT (mA)
Figure 26. Narrow Band, 1.0 kHz
I
C
, COLLECTOR CURRENT (mA)
10
0.5 dB
BANDWIDTH = 1.0 Hz
R
S
, SOURCE RESISTANCE (OHMS)
R
S
, SOURCE RESISTANCE (OHMS)
Figure 27. Wideband
I
C
, COLLECTOR CURRENT (mA)
10
10 Hz to 15.7 kHz
R
S
, SOURCE RESISTANCE (OHMS)
Noise Figure is Defined as:
NF + 20 log
10
ƪ
e
n
2
) 4KTR
S
) I
n
2
R
S
2
4KTR
S
ƫ
1ń2
= Noise Voltage of the Transistor referred to the input. (Figure 3
= Noise Current of the Transistor referred to the input. (Figure 4
= Boltzman’s Constant (1.38 x 10
−23
j/°K)
= Temperature of the Source Resistance (°K)
= Source Resistance (Ohms)
e
n
I
n
K
T
R
S
1.0 dB
2.0 dB
3.0 dB
20 30 50 70 100 200 300 500 700 1.0k 10 20 30 50 70 100 200 300 500 700 1.0k
500k
100
200
500
1.0k
10k
5.0k
20k
50k
100k
200k
2.0k
1.0M
20 30 50 70 100 200 300 500 700 1.0k
BANDWIDTH = 1.0 Hz
5.0 dB
0.5 dB
1.0 dB
2.0 dB
3.0 dB
5.0 dB
0.5 dB
1.0 dB
2.0 dB
3.0 dB
5.0 dB