wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 16

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8351
7
7.1
w
Test Conditions
DCVDD = 1.8V, AVDD = HPVDD = 3.3V, T
PARAMETER
Microphone Preamp Inputs (IN1LP, IN1LN, IN1RP, IN1RN)
Full-scale Input Signal Level
(0dB) – note this changes with
AVDD
Mic preamp equivalent input
noise
Input resistance
Input resistance
Input resistance
Input Capacitance
Recommended decoupling cap
MIC Programmable Gain Amplifier (PGA)
Programmable Gain
Programmable Gain Step Size
Mute Attenuation
Selectable Input Gain Boost (0/+20dB)
Gain Boost
Auxiliary Analogue Inputs (IN3L, IN3R)
Full-scale Input Signal Level
(0dB) – note this changes with
AVDD
PGA gain range to summer
PGA step size to summer
Input Resistance
Input Capacitance
Analogue to Digital Converter (ADC)
Signal to Noise Ratio (Note 1, 2)
Total Harmonic Distortion
(Note 4)
Digital to Analogue Converter (DAC) to Line-Out (OUT1L, OUT1R with 10kΩ / 50pF load)
Full-scale output
Signal to Noise Ratio (Note 1, 2)
Total Harmonic Distortion
(Note 3)
Channel Separation (Note 4)
Output Mixers
PGA gain range into mixer
PGA gain step into mixer
Analogue Output PGAs (OUT1L, OUT1R, OUT2L, OUT2R)
Programmable Gain range
Programmable Gain step size
Mute attenuation
Headphone Output (OUT1L, OUT1R, OUT2L, OUT2R)
0dB full scale output voltage
Signal to Noise Ratio
Total Harmonic Distortion
(Note 3)
ELECTRICAL CHARACTERISTICS
HI-FI AUDIO CODEC
At 35.25dB
SYMBOL
C
THD+N
THD+N
R
C
R
R
R
C
SNR
SNR
V
DECOUP
V
gain
AUXIN
AUXIN
MICIN
MICIN
MICIN
MICIN
INFS
INFS
A
= +25
o
PGA gains set to 0dB
1kHz, full scale signal
A-weighted, 0dB gain
R
R
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
TEST CONDITIONS
Gain set to 35.25dB
L
L
Gain set to -12dB
Gain set to 0dB
full-scale signal
= 16Ω, Po=20mW
= 32Ω, Po=20mW
HPVDD=3.3V
HPVDD=3.3V
-2dBV Input
1kHz signal
A-weighted
A-weighted
Monotonic
R
Monotonic
L
= 10kΩ
MIN
-12
-12
-75
-75
-15
-57
-65
86
90
87
0
HPVDD/3.3
HPVDD/3.3
0.33
0.75
TYP
150
101
-90
-83
-81
-72
-71
2.3
1.0
64
32
10
95
95
89
78
96
1
0
2
0
3
0
3
0
1
PD, June 2009, Rev 4.1
35.25
MAX
20
+6
+6
+6
Production Data
V rms
Vrms
Vrms
Vrms
UNIT
dBV
dBV
μV
kΩ
kΩ
kΩ
kΩ
pF
μF
dB
dB
dB
dB
dB
dB
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
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