SSM2000 Analog, SSM2000 Datasheet - Page 2

• Manufacturer Part Number: SSM2000
• Description: HUSH Stereo Noise Reduction System with Adaptive Threshold
• Manufacturer: Analog

Figure 2. Downward Expander Attenuation Characteristic
(In dBt; 0 dBt = Threshold)
SSM2000–SPECIFICATIONS
T
Parameter
AUDIO SIGNAL PATH
DYNAMIC FILTER
VCA CONTROL PORT
POWER SUPPLY
VCA, VCF DETECTOR
NOTES
1
Specifications subject to change without notice.
A
NR in defeat mode.
= +25 C, Noise Reduction and Adaptive Threshold enabled (Pin 14 at V
Signal-to-Noise Ratio
Headroom
Dynamic Range
Total Harmonic Distortion
Effective Noise Reduction
Input Impedance
Output Impedance, Dynamic
Capacitive Load
Channel Separation
Mute Output
Gain Matching, L & R Channels
Gain Bandwidth
Minimum Bandwidth
Maximum Bandwidth
Input Impedance
VCA Voltage Gain Range
Gain Constant
Control Feedthrough
Voltage Range
Supply Current
Power Supply Rejection
Input Impedance
LEVEL
INPUT
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
Symbol
SNR
HR
THD+N
Z
Z
GBW
BW
BW
A
V
I
PSRR+
R
SY
IN
OUT
V
S
IN
MIN
MAX
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
V
Conditions
V
Clip Point, THD = 1%
Clipping to Noise Floor
20 kHz Bandwidth (Flat)
Pins 1 and 2
Pins 23 and 24
No Oscillation
f = 1 kHz, V
V
VCA at A
NR Disabled
VCF C = 0.001 F
Pin 7
V
Pin 7
Pins 8 and 10
IN
IN
IN
IN
OUTPUT
LEVEL
Downward Expander Section
Dynamic Filter Section
= 0 V, 20 Hz to 20 kHz (Flat)
= 300 mV rms, 2nd & 3rd Harmonics
= 300 mV rms
= 300 mV rms (Pin 7 = 2.0 V & 0 V)
(V
V
S
= +8.5 V, ACOM = V
= 0 dB
IN
= 300 mV rms
–2–
Figure 3. Dynamic Filter Characteristic (For C
Defeat Mode)
S
/2), unless otherwise noted.)
PASSBAND FREQUENCY
S
/2, f = 1 kHz, R
RESPONSE 0.5 dB
MASKED NOISE
SIGNAL
AUDIO
1
Min
80
6
–70
20
+7.0
4.0
L
= 100 k , 0 dBu = 0.775 V rms.
SSM2000
Typ
86
4.5
91
0.02
15
10
8
7
300
60
–85
37
3
37
3.8
22
1
7.5
70
5.4
1
f
C
= 3 kHz TO 37 kHz
FILTERED NOISE
Max
0.04
+1
26
10
18
11
7.0
6 dB/OCTAVE SLOPE
F
= 0.001 F
Units
dB
dBu
dB
%
dB
dB
k
pF
dB
dB
dB
kHz
kHz
kHz
k
dB
mV/dB
mV
V
mA
dB
k
REV. 0