NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 33

• Manufacturer Part Number: NAU8812EVB
• Description: BOARD EVAL FOR NAU8812
• Manufacturer: Nuvoton Technology Corporation of America
• Series: emPowerAudio™r

Specifications of NAU8812EVB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The DAC digital block uses 24-bit signal processing to generate analog audio with a 16-bit digital sample stream
input. This block consists of a sigma-delta modulator, high pass filter, digital gain/filters, de-emphasis, and analog
mixers. The DAC coding scheme is in twos complement format and the full-scale output level is proportional to
VDDA. With a 3.3V supply voltage, the full-scale output level is 1.0V
address (0x03) bit HIGH.
emPowerAudio
Datasheet Revision 2.0
Bit(s)
DACEN[0]
ADDAP[0]
DACPL[0]
AUTOMT[2]
DEEMP[5:4]
DACMT[6]
DACGAIN[7:0]
DACLIMATK[3:0]
DACLIMDCY[7:4]
DACLIMEN[8]
DACLIMBST[3:0]
DACLIMTHL[6:4]
12.5.
Interface
Digital
Audio
DAC DIGITAL FILTER BLOCK
™
Digital
Gain
Addr
0x03
0x05
0x0A
0x0B
0x18
0x19
Table 16: Registers associated with DAC Gain Control
DAC Digital Filters
Parameter
DAC enable
Pass-through of ADC output data
into DAC input
DAC Polarity
Auto Mute
Sample Rate
Soft Mute
DAC Volume Control
DAC Limiter Attack
DAC Limiter Decay
DAC Limiter Enable
DAC Limiter Volume Boost
DAC Limiter Threshold
Limiter
Digital
Peak
Figure 17: DAC Digital Filter Path
Page 33 of 109
Digital
Filters
RMS
Interpo-
. The DAC is enabled by setting DACEN[0]
lation
Programmable Range
0 = Disable
1 = Enable
0 = Disable
1 = Enable
0 = No Inversion
1 = DAC Output Inverted
0 = Disable
1 = Enable
32 kHz, 44.1 kHz, and 48 kHz
0 = Disable
1 = Enable
Range: -127dB to 0dB @ 0.5dB
increment, 00 hex is Muted
Range: 68us to 139ms
Range: 544us to 1.1s
0 = Disable
1 = Enable
Range: 0dB to +12dB @ 1dB increment
Range: -6dB to -1bB @ 1dB increment
Modulator
Sigma
Delta
NAU8812
January 2011
DAC