Datasheet

Data Sheet SSM2220
Rev. C | Page 5 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
0V
40nV
–40nV
1s
20mV
V
CE
= 5V
I
C
= 1mA
T
A
= 25°C
VERTICAL = 40nV/DIV
HORIZONTAL = 1s/DIV
03096-002
Figure 2. Low Frequency Noise
14
0
2
4
6
8
10
12
0.001 0.01
0.1 1
NOISE FIGURE (dB)
COLLECTOR CURRENT (mA)
R
S
= 1kΩ
R
S
= 10kΩ
R
S
= 100kΩ
V
CE
= 5V
f = 1kHz
03096-003
Figure 3. Noise Figure vs. Collector Current
0.5
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
10
–8
10
–3
10
–4
10
–5
10
–6
10
–7
LOGGING ERROR (mV)
COLLECTOR CURRENT (A)
T
A
= 25°C
V
CB
= 0V
03096-004
Figure 4. Emitter to Base Log Conformity
250
0
50
100
150
200
1
10
100 1000
TOTAL NOISE (nV Hz)
COLLECTOR CURRENT (µA)
T
A
= 25°C
V
CB
= 0V
R
S
= 1kΩ
R
S
= 10kΩ
R
S
= 100kΩ
R
S
R
S
f = 1kHz
03096-005
Figure 5. Total Noise vs. Collector Current
6
5
4
3
2
1
0
0 3 6 9 12
NOISE VOLTAGE DENSITY (nV Hz)
COLLECTOR CURRENT (mA)
T
A
= 25°C
V
CB
= 0V
10Hz
100Hz
03096-006
Figure 6. Noise Voltage Density vs. Collector Current
1k
0.1
1
10
100
0.1 100k10k1k100101
NOISE VOLTAGE DENSITY (nV Hz)
FREQUENCY (Hz)
T
A
= 25°C
V
CB
= 0V
I
C
= 10µA
I
C
= 100µA
I
C
= 1mA
03096-007
Figure 7. Noise Voltage Density vs. Frequency