WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 10

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8980
TERMINOLOGY
1.
2.
3.
4.
5.
6.
7.
8.
9.
w
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD=VBVDD = 3.3V, T
otherwise stated.
PARAMETER
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input capacitance
Input leakage
Input level to RIP and LIP is limited to a maximum of -3dB or THD+N performance will be reduced.
Note when BEEP path is not enabled then AUXL and AUXR 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
not apply to ramping down the gain when the signal is too loud, which happens without a delay.
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
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
THD+N (dB) – THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
Channel Separation (dB) – Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Measured by applying a full scale signal to one channel input and measuring the level of signal apparent at
the other channel output.
The maximum output voltage can be limited by the speaker power supply.
SPKBOOST is set then SPKVDD should be 1.5xAVDD to prevent clipping taking place in the output stage (when PGA
gains are set to 0dB).
SYMBOL
V
V
V
V
OH
OL
IH
IL
TEST CONDITIONS
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
If OUT3BOOST, OUT4BOOST or
TYP
10
50
0.3DBVDD
0.1xDBVDD
PP, Rev 3.8, May 2012
MAX
Pre-Production
UNIT
pA
pF
V
V
V
V
10