SM5956A NPC, SM5956A Datasheet - Page 20

• Manufacturer Part Number: SM5956A
• Description: 6-channel Asynchronous Sample Rate Converter
• Manufacturer: NPC

www.DataSheet4U.com
Deemphasis (DEEMN pin)
Traditional deemphasis filters employ an analog circuit construction. This device uses an IIR digital filter that
faithfully reproduces the gain and phase response of analog filters. The filter coefficients are selected to match
the input sample rate fsi (44.1kHz, 48.0kHz, 32.0kHz), set by the FS0 and FS1 pins.
Deemphasis ON/OFF
DEEMN = L : Deemphasis ON
DEEMN = H: Deemphasis OFF
Deemphasis filter coefficient selection
The deemphasis filter coefficients are selected by the FS0 and FS1 pins.
Deemphasis filter characteristics
44.1kHz
44.1kHz
48.0kHz
32.0kHz
fsi
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10.0
-12.0
0
-2.0
-4.0
-6.0
-8.0
10
0.0
10
Deemphasis filter frequency response
100
FS0
100
Deemphasis filter phase response
H
H
L
L
SM5956A
Frequency [Hz]
Frequency [Hz]
1000
1000
FS1
H
H
L
L
10000
10000
SEIKO NPC CORPORATION —20
48kHz
44.1kHz
48kHz
44.1kHz
32kHz
32kHz
100000
100000