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WM8941 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part # WM8941
Description  Mono CODEC with Speaker Driver and Video Buffer
Download  96 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8941 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM8941
Pre Production
w
PP, Rev 3.3, December 2007
8
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD=1.8V, DBVDD=3.3V, AVDD=3.3V, SPKVDD =3.3V, , VBVDD=3.3V, TA = +25
oC, 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/
3.3
Vrms
Input PGA equivalent input noise
INPPGAVOL = +35.25dB
No input signal
0 to 20kHz
76.5
dB
MICN input resistance
INPPGAVOL = +35.25dB
2
k
MICN input resistance
INPPGAVOL = 0dB
58.5
k
MICN input resistance
INPPGAVOL = -12dB
97.5
k
MICP input resistance
All gain settings
124.5
k
Input Capacitance
All analogue input pins
10
pF
Maximum Input PGA Programmable
Gain
Gain adjusted by
INPPGAVOL
+33.25
+35.25
+37.25
dB
Minimum Input PGA Programmable
Gain
Gain adjusted by
INPPGAVOL
-14.00
-12
-10.00
dB
Programmable Gain Step Size
Guaranteed monotonic
0.75
dB
Input PGA Mute Attenuation
INPPGAMUTE
92
dB
Input Gain Boost
PGABOOST= 0
0
dB
Input Gain Boost
PGABOOST = 1
+20
dB
Auxiliary Analogue Inputs (AUX)
Full-scale Input Signal Level 2
AVDD/3.3
Vrms
Input Resistance
Input boost and mixer
enabled, at 0dB gain
20
k
Input Capacitance
All analogue Inputs
10
pF
Maximum Gain from AUX input PGA
mixers
Gain adjusted by
AUX2BOOSTVOL
+4.00
+6
+7.50
dB
Minimum Gain from AUX input PGA
mixers
Gain adjusted by
AUX2BOOSTVOL
-14.00
-12
-9.00
dB
AUXLBOOSTVOL and
AUXRBOOSTVOL step size
Guaranteed monotonic
3
dB
Analogue to Digital Converter (ADC) - Input from MICN and MICN in differential configuration to input PGA
INPPGAVO, PGABOOST and ADCVOL = 0dB
Signal to Noise Ratio 3
SNR
A-weighted
AVDD=3.3V
91
dB
Total Harmonic Distortion 4
THD
-1dBV Input
AVDD=3.3V
-83
dB
Total Harmonic Distortion + Noise 5
THD+N
-1dBV Input
AVDD=3.3V
-77
dB


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