Owner's manual

CS4340A
8 DS590F2
3.5 De-Emphasis
The device includes on-chip digital de-emphasis. Figure 6 shows the de-emphasis curve for F
s
equal to
44.1 kHz. The frequency response of the de-emphasis curve will scale proportionally with changes in sam-
ple rate, F
s
. Please see Table 6 for the desired de-emphasis control.
LRCK
SCLK
Left Channel
Right Channel
SDIN +3 +2 +1+5 +4
MSB
-1 -2 -3 -4 -5
+3 +2 +1+5 +4
-1 -2 -3 -4
LSB
MSB
LSB
Figure 3. CS4340A Format 1 - Left Justified up to 24-Bit Data
LRCK
SCLK
Left Channel
SDIN
65432107
23 22 21 20 19 18
65432107
23 22 21 20 19 18
32 clocks
0
Right Channel
Figure 4. CS4340A Format 2 - Right Justified, 24-Bit Data
LRCK
SCLK
Left Channel
Right Channel
SDIN
6543210987
15 14 13 12 11 10
6543210987
15 14 13 12 11 10
32 clocks
Figure 5. CS4340A Format 3 - Right Justified, 16-Bit Data
Gain
dB
-10dB
0dB
Frequency
T2 = 15 µs
T1=50 µs
F1 F2
3.183 kHz 10.61 kHz
Figure 6. De-Emphasis Curve
Table 6. De-Emphasis Control
DEM DESCRIPTION
0 Disabled
1 44.1 kHz