Production Data
WM8711BL
Test Conditions
o
AVDD, HPVDD, DBVDD = 1.8V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, T
A
= +25 C, Slave Mode, fs = 48kHz, MCLK = 256fs
unless otherwise stated.
PARAMETER
Stereo Headphone Output
0dB Full scale output voltage
Max Output Power
P
O
AVDD=HPVDD=3.3V,
R
L
= 32
AVDD=HPVDD=1.8V,
R
L
= 32
AVDD=HPVDD=1.8V,
R
L
= 16
Signal to Noise Ratio
A-weighted (Note 1,2)
Total Harmonic Distortion
SNR
THD
AVDD=HPVDD=3.3V
AVDD=HPVDD=1.8V
AVDD=HPVDD=3.3V,
1kHz, R
L
= 32
@ P
O
= 14mW rms
AVDD=HPVDD=1.8V,
1kHz, R
L
= 32
@ P
O
= 4.5mW rms
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
20Hz to 20kHz
100mVpp
Programmable Gain
Programmable Gain Step Size
Mute attenuation
1kHz
1kHz
1kHz, 0dB
-73
80
AVDD/3.3
20
9
18
96
86
0.07
-63
0.05
-66
50
45
6
1
80
6
dB
dB
dB
0.18
-55
dB
%
dB
dB
Vrms
mW
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
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).
2.
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.
6.
w
PD, Rev 4.2, December 2011
743
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
