WM8731L WOLFSON [Wolfson Microelectronics plc], WM8731L Datasheet - Page 12

• Manufacturer Part Number: WM8731L
• Description: Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8731 / WM8731L
w
Microphone Input to ADC @ 0dB Gain, fs = 48kHz (40kΩ Source Impedance. See Figure 12)
Input Signal Level (0dB)
Signal to Noise Ratio
(Note 1,3)
Dynamic Range (Note 3)
Total Harmonic Distortion
Power Supply Rejection Ratio
Programmable Gain Boost
Mic Path gain (MICBOOST gain
is additional to this nominal gain)
Mute attenuation
Input Resistance
Input Capacitance
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Line Output for DAC Playback Only (Load = 10k Ω. 50pF)
0dBfs Full scale output voltage
Signal to Noise Ratio
(Note 1,3)
Dynamic Range (Note 3)
Total Harmonic Distortion
Power Supply Rejection Ratio
DAC channel separation
Analogue Line Input to Line Output (Load = 10k Ω. 50pF, No Gain on Input ) Bypass Mode
0dB Full scale output voltage
Signal to Noise Ratio
(Note 1,3)
Total Harmonic Distortion
Power Supply Rejection Ratio
Mute attenuation
Test Conditions
AVDD, HPVDD, DBVDD = 1.8V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, T
256fs unless otherwise stated.
MICBOOST bit
1kHz, 0dB
V
I
PSRR
PSRR
R
C
PSSR
V
MICBIAS
SNR
MICBIAS
SNR
SNR
THD
THD
THD
DR
set
DR
INMIC
INMIC
INMIC
Vn
A-weighted, -60dB full
A-weighted, 0dB gain
0dB input, 0dB gain
A-weighted, -60dB
At LINE outputs
full scale input
MICBOOST = 0
0dB, 1kHz input
1kHz 100mVpp
@ fs = 48kHz
1kHz 100mVpp
1kHz 100mVpp
Rsource < 50Ω
Rsource < 50Ω
20Hz to 20kHz
@ fs = 96kHz
1kHz, -3dBfs
20Hz to 20kHz
20Hz to 20kHz
1kHz, 0dBfs
A-weighted,
A-weighted
1K to 20kHz
1kHz, 0dB
1kHz, -3dB
scale input
1kHz input
1kHz, 0dB
100mVpp
100mVpp
100mVpp
0.75*AVDD –
100mV
A
85
85
= +25
85
o
C, Slave Mode, fs = 48kHz, XTI/MCLK =
AVDD/3.3
AVDD/3.3
0.75*AVDD 0.75*AVDD +
AVDD/3.3
1.0 x
1.0 x
100
-80
-90
95
93
90
80
10k
1.0
-55
-83
-92
80
70
50
45
34
14
80
10
25
50
45
90
50
45
PD Rev 4.3 August 2006
100mV
-75
-76
3
Production Data
nV/√Hz
Vrms
Vrms
Vrms
mA
dB
dB
dB
dB
dB
dB
dB
dB
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
Ω
V
12