CS4340A Datasheet, PDF (8/20 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo DAC for Audio

CS4340A
LR C K
SCLK
SD IN
Left Channel
Right Channel
M SB -1 -2 -3 -4 -5
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4
+5 +4 +3 +2 +1 LSB
Figure 3. CS4340A Format 1 - Left Justified up to 24-Bit Data
LRCK
SCLK
SDIN 0
Left Channel
R ight Channel
23 22 21 20 19 18
76543210
23 22 21 20 19 18
Figure 4. CS4340A Format 2 - Right Justified, 24-Bit Data
32 c locks
76543210
LRCK
SCLK
Left Channel
R ight Channel
SDIN
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
32 ^Fclⁱo^gck^us^{re 5. CS4340A Format 3 - Right Justified, 16-Bit Data}
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.
Gain
dB
0dB
T1=50 µs
-10dB
T2 = 15 µs
F1
3.183 kHz
F2 Frequency
10.61 kHz
Figure 6. De-Emphasis Curve
DEM
0
1
DESCRIPTION
Disabled
44.1 kHz
Table 6. De-Emphasis Control
8
DS590PP2