WM8980
Product Preview
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD=VBVDD = 3.3V, T
A
= +25
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
otherwise stated.
PARAMETER
Full scale output voltage, 0dB
gain. (Note 10)
Output Power
Total Harmonic Distortion
P
O
THD
SYMBOL
TEST CONDITIONS
SPKRBOOST=0
SPKRBOOST=1
P
O
=180mW, R
L
= 8Ω,
SPKVDD=3.3V
P
O
=400mW, R
L
= 8Ω,
SPKVDD=3.3V
P
O
=360mW, R
L
= 8Ω,
SPKVDD=5V
P
O
=800mW, R
L
= 8Ω,
SPKVDD=5V
Signal to Noise Ratio
SNR
SPKVDD=3.3V,
R
L
= 8Ω
SPKVDD=5V,
R
L
= 8Ω
Power Supply Rejection Ratio
OUT3/OUT4 outputs (with 10kΩ / 50pF load)
Ω
Full-scale output voltage, 0dB
gain (Note 10)
OUT3BOOST=0/
OUT4BOOST=0
OUT3BOOST=1
OUT4BOOST=1
Signal to Noise Ratio (Note 6,7)
Total Harmonic Distortion
(Note 8)
Channel Separation (Note 9)
Microphone Bias
Bias Voltage
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
V
IH
V
IL
V
OH
V
OL
I
OL
=1mA
I
OH
-1mA
TBD
TBD
0.9×DBVDD
0.1xDBVDD
0.7×DBVDD
0.3×DBVDD
V
V
V
V
pF
pA
Vom
Av
DG
DP
VSNR
Vin=1Vp-p
Vin=1Vp-p
f=100kHz, THD=1%
0
1
1
+60
3
rd
order
10
5.3
1.25
6
MHz
MHz
Vp-p
dB
%
Deg
dB
V
MICBIAS
I
MICBIAS
Vn
1K to 20kHz
15
MBVSEL=0
MBVSEL=1
0.9*AVDD
0.75*AVDD
3
V
V
mA
nV/√Hz
SNR
THD
A-weighted
R
L
= 10 kΩ
full-scale signal
1kHz signal
80
TBD
SPKVDD/3.3
(SPKVDD/3.3)*1.5
98
-84
100
Vrms
Vrms
dB
dB
dB
MIN
TYP
SPKVDD/3.3
(SPKVDD/3.3)*1.5
0.3
-50
1.0
-40
0.3
-50
1
-40
90
90
50
%
dB
%
dB
%
dB
%
dB
dB
dB
dB
MAX
UNIT
Vrms
Speaker Output (LOUT2, ROUT2 with 8Ω bridge tied load, INVROUT2=1)
Ω
Output power is very closely correlated with THD; see below
w
PP Rev 1.6 January 2005
8
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
