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WM8731 bảng dữ liệu(PDF) 9 Page - Wolfson Microelectronics plc

tên linh kiện WM8731
Giải thích chi tiết về linh kiện  Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates
PDF  56 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
Trang chủ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731 bảng dữ liệu(HTML) 9 Page - Wolfson Microelectronics plc

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WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
9
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, XTI/MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Programmable Gain Boost
MICBOOST bit
set
1kHz input
Rsource < 50 Ohms
34
dB
Mic Path gain (MICBOOST gain
is additional to this nominal
gain)
MICBOOST = 0
Rsource < 50 Ohms
14
dB
Mute attenuation
0dB, 1kHz input
80
dB
Input Resistance
RINMIC
8k
10k
12k
Ohms
Input Capacitance
CINMIC
10
pF
Microphone Bias
Bias Voltage
VMICBIAS
.75*AVDD –
100mV
0.75*AVDD
.75*AVDD +
100mV
V
Bias Current Source
IMICBIAS
3mA
Output Noise Voltage
Vn
1K to 20kHz
25
nV/
√Hz
Line Output for DAC Playback Only (Load = 10k ohms. 50pF)
0dBfs Full scale output voltage
At LINE outputs
1.0 x
AVDD/3.3
Vrms
SNR (Note 1,2,3)
A-weighted,
@ fs = 48kHz
90
100
dB
SNR (Note 1,2,3)
A-weighted
@ fs = 96kHz
98
dB
SNR (Note 1,2,3)
A-weighted,
@ fs = 48kHz, AVDD
= 2.7V
93
dB
Dynamic Range (Note 3)
DR
A-weighted, -60dB
full scale input
85
90
dB
1kHz, 0dBfs
-88
-80
dB
THD
1kHz, -3dBfs
-92
-86
dB
Power Supply Rejection Ratio
PSSR
1kHz 100mVpp
50
dB
20Hz to 20kHz
100mVpp
45
dB
DAC channel separation
100
dB
Analogue Line Input to Line Output (Load = 10k ohms. 50pF, No Gain on Input ) Bypass Mode
0dB Full scale output voltage
1.0 x
AVDD/3.3
Vrms
SNR (Note 1, 3)
90
95
dB
1kHz, 0dB
-86
-80
dB
THD
1kHz, -3dB
-92
-86
dB
Power Supply Rejection Ratio
PSSR
1kHz 100mVpp
50
dB
20Hz to 20kHz
100mVpp
45
dB
Mute attenuation
1kHz, 0dB
80
dB
Stereo Headphone Output
0dB Full scale output voltage
1.0 x
AVDD/3.3
Vrms
Max Output Power RL = 32
ohms
PO
30
mW
Max Output Power RL = 16
ohms
PO
40
mW



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