Production Data
WM9712L
ELECTRICAL CHARACTERISTICS
AUDIO OUTPUTS
Test Conditions
DBVDD=3.3V, DCVDD = 3.3V, AVDD=HPVDD=SPKVDD =3.3V, T
A
= +25
o
C, 1kHz signal, fs = 48kHz, 18-bit audio data unless
otherwise stated.
PARAMETER
Full-scale output
Signal to Noise Ratio
(A-weighted)
Total Harmonic Distortion
Power Supply Rejection
SNR
THD
PSRR
-3dB output
100mV, 20Hz to 20kHz
signal on AVDD
SYMBOL
TEST CONDITIONS
AVDD = 3.3V, PGA gains
set to 0dB
85
MIN
TYP
1
94
-87
50
-80
MAX
UNIT
V rms
dB
dB
dB
DAC to Line-Out (HPOUTL/R or MONOOUT with 10kΩ / 50pF load)
Ω
Speaker Output (LOUT2/ROUT2 with 8Ω bridge tied load, INV=1)
Ω
Output Power
Total Harmonic Distortion
P
O
THD
Output power is very closely correlated with THD; see below.
P
O
=200mW
P
O
=400mW
Signal to Noise Ratio
(A-weighted)
Output Power per channel
Total Harmonic Distortion
SNR
90
-67
0.045
-66
0.050
100
-60
dB
dB
%
Headphone Output (HPOUTL/R, OUT3 or LOUT2/ROUT2 with 16Ω or 32Ω load)
Ω
Ω
P
O
THD
Output power is very closely correlated with THD; see below.
P
O
=10mW, R
L
=16Ω
P
O
=10mW, R
L
=32Ω
P
O
=20mW, R
L
=16Ω
P
O
=20mW, R
L
=32Ω
Signal to Noise Ratio
(A-weighted)
Note:
1.
All THD values are valid for the output power level quoted above – for example, at HPVDD=3.3V and R
L
=16Ω, THD is
–80dB when output power is 10mW. Higher output power is possible, but will result in a deterioration in THD.
SNR
90
-80
-80
-79
-79
95
dB
-70
dB
w
PD Rev 4.0 December 2003
7
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
