Production Data
WM8711 / WM8711L
Test Conditions
AVDD, HPVDD, DBVDD = 1.8V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, T
A
= +25
o
C, Slave Mode, fs = 48kHz, MCLK = 256fs
unless otherwise stated.
PARAMETER
DAC channel separation
0dB Full scale output voltage
Signal to Noise Ratio
(Note 1,2)
Total Harmonic Distortion
Stereo Headphone Output
0dB Full scale output voltage
Max Output Power
Signal to Noise Ratio
(Note 1,2)
Total Harmonic Distortion
P
O
SNR
THD
RL = 32Ω
RL = 16Ω
A-weighted
1kHz, R
L
= 32Ω @ P
O
=
5mW rms
1kHz 100mVpp
20Hz to 20kHz
100mVpp
Programmable Gain
Programmable Gain Step Size
Mute attenuation
1kHz
1kHz
1kHz, 0dB
-73
50
45
6
1
80
6
dB
dB
dB
80
1.0 x
AVDD/3.3
9
18
86
0.18
-55
dB
%
dB
dB
Vrms
mW
SNR
THD
1kHz, 0dB
90
SYMBOL
TEST CONDITIONS
1kHz, 0dB signal
MIN
TYP
100
1.0 x
AVDD/3.3
101
-93
-85
dB
dB
MAX
UNIT
dB
Vrms
Analogue Line Input to Line Output (Load = 10kΩ. 50pF, No Gain on Input ) Bypass Mode
Ω
Power Supply Rejection Ratio
PSRR
TERMINOLOGY
1.
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).
Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal. Normally
a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB to it. (e.g.
THD+N @ -60dB= -32dB, DR= 92dB).
3.
4.
5.
THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).
Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
2.
6.
w
PD Rev 4.3 September 2006
10
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
