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
Vrms
Vrms
uV
Microphone Preamp Inputs (LIP, LIN, RIP, RIN, L2, R2)
Full-scale Input Signal Level –
Single-ended input via LIN/RIN
VINFS
VINFS
PGABOOST = 0dB
INPPGAVOL = 0dB
PGABOOST = 0dB
INPPGAVOL = 0dB
0 to 20kHz
AVDD1/3.3
Full-scale Input Signal Level –
Pseudo-differential input
AVDD1*0.7/
3.3
Mic PGA equivalent input noise
At 35.25dB
gain
150
Input resistance (LIN, RIN)
Input resistance (LIN, RIN)
Input resistance (LIN, RIN)
Input resistance (LIP, RIP)
Input resistance (L2, R2)
RMICIN
RMICIN
RMICIN
RMICIP
RL2R2
Gain set to 35.25dB
Gain set to 0dB
1.6
46
71
90
90
k
k
k
k
k
Gain set to -12dB
L/RIP2INPPGA = 1,
L/R2_2BOOSTVOL = 000
Input resistance (L2, R2)
Input resistance (L2, R2)
RL2R2
RL2R2
L/RIP2INPPGA = 0, Gain set
to 6dB
11
22
k
k
L/RIP2INPPGA = 0,
Gain set to 0dB
Input resistance (L2, R2)
RL2R2
L/RIP2INPPGA = 0,
Gain set to -12dB
60
k
Input Capacitance
CMICIN
10
+35.25
-12
pF
dB
dB
dB
dB
dB
dB
Maximum Programmable Gain
Minimum Programmable Gain
Programmable Gain Step Size
MIC Mute Attenuation
Guaranteed monotonic
INPPGAMUTEL/R=1
PGABOOSTL/R=0
PGABOOSTL/R=1
0.75
100
0
MIC Gain Boost
20
L2, R2 Line Input Programmable Gain
Maximum Gain from L/R2 input
to boost/mixer
+6
dB
dB
Gain adjusted by
L2_2BOOSTVOL
R2_2BOOSTVOL
Minimum Gain from L/R2 input
to boost/mixer
-12
Gain adjusted by
L2_2BOOSTVOL
R2_2BOOSTVOL
L2/R2 boost step size
L2/R2 Mute attenuation
OUT4 to Left or Right Input Boost Record Path
Maximum Gain
Guaranteed monotonic
3
dB
dB
100
+6
-12
3
dB
dB
dB
dB
Minimum Gain
Gain step size
Guaranteed monotonic
Mute attenuation
100
Automatic Level Control (ALC)
Target Record Level
-22.5
-12
-1.5
dB
Programmable gain
35.25
PD, Rev 4.4, January 2012
7
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
