WM8961
Pre-Production
ELECTRICAL CHARACTERISTICS
Test Conditions
MICVDD = 2.5V, DVDD = 1.8V, CPVDD=1.8V, AVDD = 1.8V SPKVDD1 = SPKVDD2 = 5V, TA = +25oC, 1kHz signal, fs = 48kHz,
PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue Inputs (LINPUT, RINPUT)
Full-scale Input Signal Level –
note this changes in proportion
to AVDD
VINFS
L/RINPUT
Single-ended
500
-6.02
mVrms
dBV
Mic PGA equivalent input noise
20Hz to 20kHz,
+24dB gain
3
uV
kΩ
kΩ
kΩ
pF
Input resistance
L/RINPUT
L/RINPUT
L/RINPUT
Cin
+24dB PGA gain
3.5
28
53
10
0dB PGA gain
-23.25dB PGA gain
Input capacitance
MIC Programmable Gain Amplifier (PGA)
Programmable Gain
24
Input from L/RINPUT
Guaranteed monotonic
-23.25
dB
dB
dB
Programmable Gain Step Size
Mute Attenuation
0.75
85
Selectable Input Gain Boost
Gain Boost Steps
0, 13, 20,
29
Input from PGA
-1dBFS input
dB
Analogue Inputs (LINPUT, RINPUT) to ADC out
Signal to Noise Ratio
(A-weighted)
SNR
80
88
dB
dB
Total Harmonic Distortion Plus
Noise
THD+N
THD
-82
-75
-75
Total Harmonic Distortion
ADC Channel Separation
-1dBFS input
1kHz
-86
97
97
60
dB
dB
dB
dB
10kHz
PSRR
100mV(peak-peak) 1kHz
applied to AVDD
PSRR
100mV(peak-peak) 20kHz
applied to AVDD
40
dB
dB
Channel Matching
1kHz signal
+/-0.5
DAC to HP_L, HP_R (used as Line output) with 10kΩ / 50pF load: standard headphone playback mode
Full scale output voltage
L/ROUTVOL = 0dB
1.0
97
Vrms
dB
Signal to Noise Ratio
(A-weighted)
SNR
THD+N
THD
87
Total Harmonic Distortion Plus
Noise
10kΩ load
-78
-67
-68
dB
Total Harmonic Distortion
Channel Separation
10kΩ load
-79
100
85
dB
dB
1kHz full scale signal
10kHz full scale signal
100mV(peak-peak) 1kHz
PSRR (AVDD)
DC offset
60
dB
dB
100mV(peak-peak)
20kHz
58
DC servo is enabled
-1.5
+1.5
mV
PP, August 2009, Rev 3.1
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8
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
