WM8961
Pre-Production
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
PO =320mW, RL = 8Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=1.8V
-61
0.089
-50
0.32
dB
%
PO =1W, RL = 8Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=1.8V
-58
0.13
-45
0.56
dB
%
Signal to Noise Ratio
(A-weighted)
(DAC to speaker outputs)
SNR
SPKVDD1=SPKVDD2
=3.3V; AVDD=1.8V;
RL = 8Ω, ref=2.0Vrms
90
92
1
dB
dB
uA
SPKVDD1=SPKVDD2
=5V; AVDD=1.8V;
82
RL = 8Ω, ref=2.8Vrms
Speaker Supply Leakage current
ISPKVDD
SPKVDD1=SPKVDD2
=5V;
All other supplies
disconnected
5
5
SPKVDD1=SPKVDD2
=5V;
1
uA
All other supplies 0V
Power Supply Rejection Ratio
(SPKVDD1/SPKVDD2)
PSRR
100mV(peak-peak)
217Hz
75
75
dB
dB
100mV(peak-peak) 1kHz
Guaranteed monotonic
SPKL/RVOL
Volume Gain
6
6
-68
-68
dB
dB
dB
Volume Gain Step Size
Mute Attenuation
1
87
L/ROUTVOL
Volume Gain
dB
dB
dB
Volume Gain Step Size
Mute Attenuation
Guaranteed monotonic
1
85
Analogue Reference Levels
Mid-rail Reference Voltage
Microphone Bias
VMID
–3%
AVDD/2
+3%
V
V
Bias Voltage
VMICBIAS
MICVDD=2.5V
2mA load current
MBSEL=1
-10%
7/6×AVDD
+10%
(Note that MBSEL=1 only
allowed if MICVDD is greater
than +2.40V )
MICVDD=2.5V
2mA load current
MBSEL=0
-10%
5/6×AVDD
+10%
V
Power Supply Rejection Ratio
100mV ripple on MICVDD
@1kHz, MBSEL=1
PSRR
68
51
dB
100mV ripple on AVDD
@1kHz, MBSEL=1
Bias Current Source
IMICBIAS
Vst
2
1
mA
Output Noise spectral density
@1KHz
1KHz, MBSEL=1
85
nV/√Hz
CHARGE PUMP
Charge Pump switching
frequency
CPFREQ
CFB
MHz
Flyback capacitor
(between CFB1 and CFB2 pins)
at 2V
1
μF
PP, August 2009, Rev 3.1
w
10
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
