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SSM2166
REV. A
–4–
0
–80
–80 0–70 –60 –50 –40 –30 –20 –10
–10
–40
–50
–60
–70
–20
–30
T
A
= +25°C
V+ = 5V
V
IN
= 300mV rms @ 1kHz
R
L
= 100k⍀
NOISE GATE SETTING
550µV rms
ROTATION POINT 300mV rms
GAIN ADJUST (PIN 2) = 1.25k⍀
COMP RATIO = 1:1
COMP RATIO = 2:1
COMP RATIO = 5:1
COMP RATIO = 10:1
COMP RATIO = 15:1
INPUT – dBu
OUTPUT – dBu
INPUT – dBu
Figure 3. Output vs. Input Characteristics
R
GATE
– k⍀
NOISE GATE – mV rms
10
1
0.1
0 45050 100 350 400150 200 250 300 500 550 600 650
100
T
A
= +25°C
V+ = 5V
R
L
= 100k⍀
COMPRESSION RATIO = 2:1
ROTATION POINT
1V rms
GAIN ADJUST (PIN 2) = 1.25k⍀
Figure 4. Noise Gate vs. R
GATE
(Pin 9 to V+)
COMPRESSION
RATIO
ROTATION POINT
1:1 2:1 5:1 10:1 15:1
100mV rms 0
300mV rms 0
1V rms 0
12.5
12.5
12.5
96
96
96
215
215
215
395
395
395
R
COMP
– k⍀, TYPICAL
Figure 5. Compression Ratio vs. R
COMP
(Pin 10 to GND)
GAIN – dB
GAIN ADJUST RESISTOR – k⍀
20
6
0
0262 4 6 8 10 12 14 16 18 20 22 24
18
8
4
2
14
10
16
12
28 30
T
A
= +25°C
V+ = 5V
R
L
= 100k⍀
V
IN
= 100mV rms @ 1kHz
NOISE GATE SETTING
550V rms
ROTATION POINT (PIN 11)
1V rms
COMPRESSION RATIO = 1:1
Figure 6. VCA Gain vs. R
GAIN
(Pin 2 to GND)
INPUT VOLTAGE – V rms
THD + N – %
5
1
0.1
0.01 10.1
0.05
R
L
= 10k⍀
R
L
= 100k⍀
T
A
= +25°C
V+ = 5V
COMPRESSION RATIO = 1:1
NOISE GATE SETTING
550V rms
ROTATION POINT 1V rms
GAIN ADJUST (PIN 2) = 1.25k⍀
V
IN
FREQUENCY = 1kHz
Figure 7. THD+N (%) vs. Input (V rms)
FREQUENCY – Hz
THD + N – %
5
1
0.1
20 30k100
0.05
1k 10k
T
A
= +25°C
V+ = 5V
V
IN
= 77.5mV rms @ 1kHz
COMPRESSION RATIO = 1:1
NOISE GATE SETTING
550V rms
ROTATION POINT 1V rms
GAIN ADJUST (PIN 2) = 1.2k⍀
MEASUREMENT FILTER BW : 22Hz TO 30kHz
Figure 8. THD+N (%) vs. Frequency (Hz)