NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 15

• 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

Automatic Level Control (ALC)/Limiter – ADC only
Gain Ramp-Up (Decay) Time
Gain Ramp-Down (Attack) Time
5, 6
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
VDDC = 1.8V, VDDA = VDDB = SPKBST = 3.3V, T
otherwise stated.
Notes
1.
THD+N performance will not be reduced.
2.
output with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
3.
4.
does not apply to ramping down the gain when the signal is too loud, which happens without a delay.
5.
range.
6.
7.
VDDSPK should be 1.5xVDDA to prevent clipping taking place in the output stage (when PGA gains are set to 0dB).
emPowerAudio
Datasheet Revision 2.0
PARAMETER
Full Scale is relative to VDDA (FS = VDDA/3.3.). Input level to AUX is limited to a maximum of -3dB so that
Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full-scale output and the
THD+N (dB) - THD+N are a ratio, of the rms values, of (Noise + Distortion)/Signal.
Hold Time is the length of time between a signal detected being too quiet and beginning to ramp up the gain. It
Ramp-up and Ramp-Down times are defined as the time it takes to change the PGA gain by 6dB of its gain
All hold, ramp-up and ramp-down times scale proportionally with MCLK
The maximum output voltage can be limited by the speaker power supply. If MOUTBST or SPKBST is, set then
™
5, 6
SYMBOL
t
t
V
V
V
V
DCY
ATK
OH
OL
IH
IL
ALC Mode
ALCM=0
MCLK=12.288MHz
Limiter Mode
ALCM=1
MCLK=12.288MHz
ALC Mode
ALCM=0
MCLK=12.288MHz
Limiter Mode
ALCM=1
MCLK=12.288MHz
I
I
OL
OH
= 1mA
= -1mA
Page 15 of 109
A
= +25
TEST CONDITIONS
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
VDDC
VDDC
3.3 / 6.6 / 13.1 / … / 3360
(time doubles every step)
0.7 ×
0.9 ×
744 (time doubles every
852 (time doubles every
186 (time doubles every
MIN
0.73 / 1.45 / 2.91 / … /
0.83 / 1.66 / 3.33 / … /
0.18 / 0.36 / 0.73 / … /
NAU8812
January 2011
TYP
step)
step)
step)
3.25
VDDC
VDDC
MAX
0.3 ×
0.1 x
UNIT
ms
ms
ms
ms
V
V
V
V