wm8982gefl-v Wolfson Microelectronics plc, wm8982gefl-v Datasheet - Page 9

• Manufacturer Part Number: wm8982gefl-v
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
TERMINOLOGY
1.
2.
3.
4.
5.
6.
7.
w
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD=VBVDD = 3.3V, T
otherwise stated.
PARAMETER
Bias Current Source
Output Noise Voltage
Video Buffer
Low pass filter order
LPF -3dB cutoff
LPF gain flat to within 0.1dB
Maximum output voltage swing
Programmable Voltage Gain
Differential gain
Differential phase
Signal to Noise Ratio
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input capacitance
Input leakage
not apply to ramping down the gain when the signal is too loud, which happens without a delay.
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
then SPKVDD should be 1.5xAVDD to prevent clipping taking place in the output stage (when PGA gains are set to
0dB).
Note when BEEP path is not enabled then AUX1 and AUX2 have the same input impedances.
Hold Time is the length of time between a signal detected being too quiet and beginning to ramp up the gain. It does
Ramp-up and Ramp-Down times are defined as the time it takes for the PGA to sweep across 90% of its gain range.
All hold, ramp-up and ramp-down times scale proportionally with MCLK
Signal-to-noise ratio (dB) – SNR is a measure of the difference in level between the full scale output and the output
THD+N (dB) – THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
The maximum output voltage can be limited by the speaker power supply. If MONOBOOST or SPKRBOOST is set
SYMBOL
I
VSNR
MICBIAS
Vom
V
V
DG
DP
V
Vn
Av
V
OH
OL
IH
IL
f=100kHz, THD=1%
TEST CONDITIONS
1K to 20kHz
MBVSEL=1
Vin=1Vp-p
Vin=1Vp-p
I
I
OL
OH
A
=1mA
-1mA
= +25
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
0.7×DBVDD
0.9×DBVDD
MIN
0
0.65*AVDD
3
rd
1.25
TBD
TBD
TYP
+60
5.3
0.3
0.7
15
10
order
PP, Rev 3.2, September 2008
0.3×DBVDD
0.1xDBVDD
MAX
3
6
WM8982
nV/√Hz
Vp-p
UNIT
MHz
MHz
Deg
mA
dB
dB
pF
pA
%
V
V
V
V
V
9