WM8956 查看數據表（PDF） - Wolfson Microelectronics plc
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生产厂家
WM8956
Wolfson Microelectronics plc
WM8956 Datasheet PDF : 80 Pages
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WM8956
Production Data
Test Conditions
DCVDD = 1.8V, DBVDD = 3.3V, AVDD = SPKVDD1 = SPKVDD2 = 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB,
24-bit audio data unless otherwise stated.
PARAMETER
Total Harmonic Distortion Plus
Noise
(LINPUT3 and RINPUT3 to
speaker outputs)
Signal to Noise Ratio
(A-weighted)
(DAC to speaker outputs)
Signal to Noise Ratio
(A-weighted)
(LINNPUT3 and RINPUT3 to
speaker outputs)
Speaker Supply Leakage current
Power Supply Rejection Ratio
(100mV ripple on
SPKVDD1/SPKVDD2 @217Hz)
Analogue Reference Levels
Midrail Reference Voltage
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input capacitance
Input leakage
SYMBOL TEST CONDITIONS
MIN
THD+N
PO =200mW, RL = 8,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
PO =320mW, RL = 8,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
PO =500mW, RL = 8,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
PO =1W, RL = 8,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
SNR
SNR
ISPKVDD
PSRR
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V;
RL = 8, ref=2.0Vrms
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V;
RL = 8, ref=2.8Vrms
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V;
RL = 8, ref=2.0Vrms
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V;
RL = 8, ref=2.8Vrms
SPKVDD1=SPKVDD2
=5V;
All other supplies
disconnected
SPKVDD1=SPKVDD2
=5V;
All other supplies 0V
DAC to speaker playback
L/RINPUT3 to speaker
playback
TYP
-78
0.013
-72
0.025
-75
0.018
-70
0.032
90
92
90
92
1
1
80
80
MAX
VMID
–3%
AVDD/2
+3%
VMICBIAS
IMICBIAS
Vn
3mA load current
MBSEL=1
3mA load current
MBSEL=0
1K to 20kHz
–5%
–5%
0.9AVDD
0.65AVDD
15
+ 5%
+ 5%
3
VIH
0.7DBVDD
VIL
VOH
IOL=1mA
0.9DBVDD
0.3DBVDD
VOL
IOH=-1mA
0.1DBVDD
10
-0.9
0.9
UNIT
dB
%
dB
%
dB
%
dB
%
dB
dB
dB
dB
uA
uA
dB
dB
V
V
V
mA
nV/Hz
V
V
V
V
pF
uA
w
PD, November 2011, Rev 4.1
8
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