CDB4350 Cirrus Logic Inc, CDB4350 Datasheet - Page 33

• Manufacturer Part Number: CDB4350
• Description: Eval Bd 105dB 192kHz DAC W/PLL
• Manufacturer: Cirrus Logic Inc

Specifications of CDB4350

• 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: Single
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS4350
• Description/function: Audio D/A
• Operating Supply Voltage: 12 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS4350
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1517

DS691F1
8.5
8.6
8.6.1
VOL7
SZC1
7
0
7
1
Channel A & B Volume Control - Register 05h & 06h
Ramp and Filter Control - Register 07h
Digital Volume Control (VOL[7:0])
Default = 00h (0 dB)
Function:
The Digital Volume Control registers allow independent control of the signal levels in 1/2 dB increments
from 0 to -127.5 dB. Volume settings are decoded as shown in
mented as dictated by the Soft and Zero Cross bits in the Power and Muting Control register. The actual
attenuation is determined by taking the decimal value of the volume register and multiplying by 6.02/12.
Soft Ramp and Zero Cross Control (SZC[1:0]) Bits 7-6
Default = 10
Function:
Immediate Change
When Immediate Change is selected all level changes will take effect immediately in one step.
Zero Cross
Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur
on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a time-
out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal
does not encounter a zero crossing. The zero cross function is independently monitored and implemented
for each channel.
Soft Ramp PCM
Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally ramp-
ing, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock periods.
VOL6
SZC0
6
0
6
0
SZC1 SZC0
RMP_UP
Binary Code
0
0
1
1
VOL5
00000000
00000001
00000110
5
0
5
1
11111111
0
1
0
1
Table 5. Example Digital Volume Settings
Bits 7-0
RMP_DN
VOL4
4
0
4
1
Soft Ramp on Zero Crossings
Decimal Value
Immediate Change
Description
Reserved
Zero Cross
Soft Ramp
255
VOL3
0
1
6
3
0
3
0
Table
FILT_SEL
VOL2
Volume Setting
2
0
2
0
5. The volume changes are imple-
-127.5 dB
-0.5 dB
-3.0 dB
0 dB
Reserved
VOL1
1
0
1
0
CS4350
Reserved
VOL0
0
0
0
1
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