WM8352
Production Data
7
ELECTRICAL CHARACTERISTICS
7.1 HI-FI AUDIO CODEC
Test Conditions
DCVDD = 1.8V, AVDD = HPVDD = 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 (IN1LP, IN1LN, IN1RP, IN1RN)
Full-scale Input Signal Level
(0dB) – note this changes with
AVDD
VINFS
1
0
V rms
dBV
Mic preamp equivalent input
noise
At
35.25dB
gain
150
μV
Input resistance
RMICIN
RMICIN
Gain set to 35.25dB
Gain set to 0dB
2.3
64
kΩ
kΩ
kΩ
pF
μF
Input resistance
Input resistance
RMICIN
Gain set to -12dB
101
2
Input Capacitance
Recommended decoupling cap
CMICIN
CDECOUP
0.33
MIC Programmable Gain Amplifier (PGA)
Programmable Gain
-12
0
35.25
20
dB
dB
dB
Programmable Gain Step Size
Mute Attenuation
Monotonic
0.75
-90
Selectable Input Gain Boost (0/+20dB)
Gain Boost
dB
Auxiliary Analogue Inputs (IN3L, IN3R)
Full-scale Input Signal Level
(0dB) – note this changes with
AVDD
VINFS
1.0
0
V rms
dBV
PGA gain range to summer
PGA step size to summer
Input Resistance
-12
+6
dB
dB
kΩ
pF
3
RAUXIN
CAUXIN
32
10
Input Capacitance
Analogue to Digital Converter (ADC)
Signal to Noise Ratio (Note 1, 2)
Total Harmonic Distortion
(Note 4)
A-weighted, 0dB gain
-2dBV Input
86
95
dB
dB
-75
-83
Digital to Analogue Converter (DAC) to Line-Out (OUT1L, OUT1R with 10kΩ / 50pF load)
Full-scale output
PGA gains set to 0dB
A-weighted
HPVDD/3.3
V rms
dB
Signal to Noise Ratio (Note 1, 2)
Total Harmonic Distortion
(Note 3)
SNR
90
95
THD+N
RL = 10kΩ
full-scale signal
-75
-81
dB
Channel Separation (Note 4)
Output Mixers
1kHz signal
89
dB
PGA gain range into mixer
PGA gain step into mixer
-15
-57
0
3
+6
+6
dB
dB
Analogue Output PGAs (OUT1L, OUT1R, OUT2L, OUT2R)
Programmable Gain range
0
1
dB
dB
dB
Programmable Gain step size
Mute attenuation
Monotonic
1KHz, full scale
signal
78
PD, February 2011, Rev 4.4
16
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
