CDB4392 Cirrus Logic Inc, CDB4392 Datasheet - Page 12

• Manufacturer Part Number: CDB4392
• Description: EVALUATION BOARD FOR CS4392
• Manufacturer: Cirrus Logic Inc

Specifications of CDB4392

• Number Of Dac's: 2
• Number Of Bits: 24
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 192k
• Data Interface: Serial
• Dac Type: Voltage
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -10°C ~ 70°C
• Utilized Ic / Part: CS4392
• Description/function: Audio D/A
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS4392
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

3.7
The device includes on-chip digital de-emphasis. Figure 7 shows the de-emphasis curve for F
44.1 kHz. The frequency response of the de-emphasis curve will scale proportionally with changes in sam-
ple rate, F
control port mode.
The de-emphasis feature is included to accommodate audio recordings that utilize 50/15 µS pre-emphasis
equalization as a means of noise reduction.
De-emphasis is only available in Single Speed Mode.
3.8
The CS4392 operates in one of three oversampling modes based on the input sample rate. Mode selection
is determined by the M3 and M2 pins in Stand-Alone mode or the FM bits in Control Port mode. Single-
Speed mode supports input sample rates up to 50 kHz and uses a 128x oversampling ratio. Double-Speed
mode supports input sample rates up to 100 kHz and uses an oversampling ratio of 64x. Quad-Speed mode
supports input sample rates up to 200 kHz and uses an oversampling ratio of 32x
12
-10dB
Gain
M3
0dB
0
0
1
1
dB
De-Emphasis
Oversampling Modes
s
. Please see Table 5 for the desired de-emphasis control for Stand-alone mode and Table 10 for
Figure 7. De-Emphasis Curve
3.183 kHz
M2
T1=50 µs
0
1
0
1
F1
Single-Speed without De-Emphasis (4 to 50 kHz sample rates)
Single-Speed with 44.1kHz De-Emphasis
Double-Speed (50 to 100 kHz sample rates)
Quad-Speed (100 to 200 kHz sample rates)
Table 6. Mode Selection, Stand-Alone Mode Options
10.61 kHz
F2
T2 = 15 µs
Frequency
Table 5. De-Emphasis Select, Stand-Alone Mode
(DEM)
DESCRIPTION
M2
0
1
No De-Emphasis
De-Emphasis Enabled
DESCRIPTION
FIGURE
7
CS4392
DS459PP3
S
equal to