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WM8721 数据表(PDF) 4 Page - Wolfson Microelectronics plc

部件名 WM8721
功能描述  Internet Audio DAC with Integrated Headphone Driver
PDF  34 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8721 数据表(HTML) 4 Page - Wolfson Microelectronics plc

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WM8721
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WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 November 2000
4
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range (Core)
DCVDD
1.42
3.6
V
Digital supply range (Buffer)
DBVDD
2.7
3.6
V
Analogue supply range
AVDD, HPVDD
2.7
3.6
V
Ground
DGND, AGND, HPGND
0
V
Total analogue supply current
IAVDD, IHPVDD
DCVDD, DBVDD, AVDD,
HPVDD = 3.3V
8mA
Digital supply current
IDCVDD, IDBVDD
DCVDD, DBVDD, AVDD,
HPVDD = 3.3V
3mA
Standby Current Consumption
10
uA
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
0.3 x VDD
V
Input HIGH level
VIH
0.7 x VDD
V
Output LOW
VOL
0.1 x VDD
V
Output HIGH
VOH
0.9 x VDD
V
Analogue Reference Levels
Reference voltage
VVMID
AVDD/2 –
50mV
AVDD/2
AVDD/2 +
50mV
V
Potential divider resistance
RVMID
40K
50K
60K
Ohms
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)
A-weighted,
@ fs = 48KHz
90
100
dB
SNR (Note 1,2)
A-weighted
@ fs = 96KHz
98
dB
SNR (Note 1,2)
A-weighted,
@ fs = 48KHz, AVDD
= 2.7V
93
dB
Dynamic Range (Note 2)
DNR
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
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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