WM8952 View Datasheet(PDF) - Wolfson Microelectronics plc
Part Name
Description
Manufacturer
WM8952 Datasheet PDF : 72 Pages
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Pre Production
WM8952
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD=1.8V, DBVDD=3.3V, AVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Microphone Input PGA Inputs (MICN, MICP)
INPPGAVOL and PGABOOST = 0dB
Full-scale Input Signal Level – Single-
ended input via LIN/RIN 1
AVDD/3.3
Vrms
Full-scale Input Signal Level –
Pseudo-differential input 1,2
AVDD*0.7/
Vrms
3.3
Input PGA equivalent input noise
MICN input resistance
MICN input resistance
MICN input resistance
MICP input resistance
Input Capacitance
Maximum Input PGA Programmable
Gain
Minimum Input PGA Programmable
Gain
Programmable Gain Step Size
Input PGA Mute Attenuation
Input Gain Boost
Input Gain Boost
Auxiliary Analogue Input (AUX)
Full-scale Input Signal Level 2
INPPGAVOL = +35.25dB
No input signal
0 to 20kHz
INPPGAVOL = +35.25dB
INPPGAVOL = 0dB
INPPGAVOL = -12dB
All gain settings
All analogue input pins
Gain adjusted by
INPPGAVOL
Gain adjusted by
INPPGAVOL
Guaranteed monotonic
INPPGAMUTE
PGABOOST= 0
PGABOOST = 1
+33.25
-14.00
76.5
2
58.5
97.5
124.5
10
+35.25
-12
0.75
92
0
+20
+37.25
-10.00
AVDD/3.3
Input Resistance
Input boost and mixer
20
enabled, at 0dB gain
Input Capacitance
All analogue Inputs
10
Maximum Gain from AUX input PGA
mixers
Gain adjusted by
+4.00
+6
+7.50
AUX2BOOSTVOL
Minimum Gain from AUX input PGA
mixers
Gain adjusted by
-14.00
-12
AUX2BOOSTVOL
-9.00
AUX2BOOSTVOL step size
Guaranteed monotonic
3
Analogue to Digital Converter (ADC) - Input from MICN and MICP in differential configuration to input PGA
INPPGAVO, PGABOOST and ADCVOL = 0dB
Signal to Noise Ratio 3
SNR
A-weighted
81
91
Total Harmonic Distortion 4
Total Harmonic Distortion + Noise 5
THD
THD+N
AVDD=3.3V
-1dBV Input
AVDD=3.3V
-1dBV Input
AVDD=3.3V
-83
-74
-77
-68
Microphone Bias
Bias Voltage
MBVSEL=0
0.85* 0.9*AVDD
AVDD
0.95*
AVDD
MBVSEL=1
0.65*AVDD
Bias Current Source
Output Noise Voltage
for VMICBIAS within +/-3%
1kHz to 20kHz
3
15
dB
kΩ
kΩ
kΩ
kΩ
pF
dB
dB
dB
dB
dB
dB
Vrms
kΩ
pF
dB
dB
dB
dB
dB
dB
V
V
mA
nV/√Hz
w
PP, Rev 3.1, June 2011
7
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