Production Data
WM8945
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
98
MAX
UNIT
Bypass to Line Output (IN2L to Input PGA to Line Output, 10k / 50pF)
SNR (A-weighted)
THD+N
PGA Gain = 0dB
INPPGAVOL = 0dB
PGA Gain = 0dB
90
dB
dB
-89.5
-82
INPPGAVOL = 0dB
Bypass to Speaker Output (single-ended AUX1, AUX2 to Input PGA to SPKMIX to Speaker Output, 10k / 50pF)
SNR (A-weighted)
PGA Gain = 0dB
INPPGAVOL = 0dB
PGA Gain = 0dB
90
96
dB
dB
THD+N
-86.5
-77
INPPGAVOL = 0dB
DAC Output Path Performance (DAC to Line Output, 10k / 50pF)
Maximum output signal
level (changes in
1
Vrms
proportion to LDOVOUT)
SNR (A-weighted)
THD
85
96
-80
-78
125
48
dB
dB
dB
dB
dB
-72
-70
THD+N
Mute attenuation
PSRR (with respect to
LDOVDD)
217Hz
1kHz
60
Line Output Resistance
Line Output Capacitance
10
k
50
pF
DAC Output Path Performance (DAC to Speaker Output, 10k / 50pF)
Maximum output signal
level (changes in
1
Vrms
proportion to LDOVOUT)
SNR (A-weighted)
THD
96
-78
-76
dB
dB
dB
THD+N
Speaker Output Performance (Speaker Output, 8 BTL)
SNR (A-weighted)
90
96
0.03
-68
2.944
30.6
0.05
-66
3.72
-28.6
92
dB
%
THD
PO=150mW
PO=350mW
PO=150mW
PO=350mW
dB
%
dB
%
THD+N
dB
%
dB
dB
dB
Mute attenuation
PSRR (with respect to
LDOVDD)
217Hz
1kHz
48
60
PSRR (with respect to
SPKVDD)
217Hz
1kHz
89
dB
79
Speaker Resistance
Speaker Capacitance
8
50
pF
PD, May 2011, Rev 4.1
11
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
