WM8758B 查看數據表（PDF） - Wolfson Microelectronics plc
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WM8758B Datasheet PDF : 90 Pages
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Production Data
WM8758B
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=3.0V, DBVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise
stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Microphone Preamp Inputs (LIP, LIN, RIP, RIN, L2, R2)
Full-scale Input Signal Level –
Single-ended input via LIN/RIN
VINFS
PGABOOST = 0dB
INPPGAVOL = 0dB
AVDD1/3.3
Vrms
Full-scale Input Signal Level –
Pseudo-differential input
VINFS
PGABOOST = 0dB
INPPGAVOL = 0dB
AVDD1*0.7/
3.3
Vrms
Mic PGA equivalent input noise
At 35.25dB
gain
0 to 20kHz
150
uV
Input resistance (LIN, RIN)
RMICIN
Gain set to 35.25dB
1.6
k
Input resistance (LIN, RIN)
RMICIN
Gain set to 0dB
46
k
Input resistance (LIN, RIN)
RMICIN
Gain set to -12dB
71
k
Input resistance (LIP, RIP)
RMICIP
90
k
Input resistance (L2, R2)
RL2R2
L/RIP2INPPGA = 1,
90
k
L/R2_2BOOSTVOL = 000
Input resistance (L2, R2)
RL2R2
L/RIP2INPPGA = 0, Gain set
11
k
to 6dB
Input resistance (L2, R2)
RL2R2
L/RIP2INPPGA = 0,
22
k
Gain set to 0dB
Input resistance (L2, R2)
RL2R2
L/RIP2INPPGA = 0,
60
k
Gain set to -12dB
Input Capacitance
CMICIN
10
pF
Maximum Programmable Gain
+35.25
dB
Minimum Programmable Gain
-12
dB
Programmable Gain Step Size
Guaranteed monotonic
0.75
dB
MIC Mute Attenuation
INPPGAMUTEL/R=1
100
dB
MIC Gain Boost
PGABOOSTL/R=0
0
dB
PGABOOSTL/R=1
20
dB
L2, R2 Line Input Programmable Gain
Maximum Gain from L/R2 input
to boost/mixer
Gain adjusted by
+6
dB
L2_2BOOSTVOL
R2_2BOOSTVOL
Minimum Gain from L/R2 input
to boost/mixer
Gain adjusted by
-12
dB
L2_2BOOSTVOL
R2_2BOOSTVOL
L2/R2 boost step size
Guaranteed monotonic
3
dB
L2/R2 Mute attenuation
100
dB
OUT4 to Left or Right Input Boost Record Path
Maximum Gain
+6
dB
Minimum Gain
-12
dB
Gain step size
Guaranteed monotonic
3
dB
Mute attenuation
100
dB
Automatic Level Control (ALC)
Target Record Level
-22.5
-1.5
dB
Programmable gain
-12
35.25
w
PD, Rev 4.4, January 2012
7
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