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WM8731SEDS/R 数据表(PDF) 12 Page - Wolfson Microelectronics plc

部件名 WM8731SEDS/R
功能描述  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
PDF  63 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8731SEDS/R 数据表(HTML) 12 Page - Wolfson Microelectronics plc

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



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