參數(shù)資料
型號： WM8718
廠商： Wolfson Microelectronics
英文描述： 24 BIT DIFFERENTIAL STEREO DAC WITH VOLUME CONTROL
中文描述： 24位差分立體聲DAC，具有音量控制
文件頁數(shù)： 6/27頁
文件大?。?/td> 284K
代理商： WM8718
WM8718
Production Data
w
PD Rev 4.1 March 2004
6
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Supply current
SYMBOL
DVDD
AVDD
AGND, DGND
TEST CONDITIONS
AVDD = 3.3V
AVDD = 5V
DVDD = 3.3V
DVDD = 5V
MIN
3.0
3.0
-0.3
0.191
a
0.191
a
160 uA
160 uA
TYP
0
0
19
22
7.1
8.3
MAX
5.5
5.5
+0.3
UNIT
V
V
V
V
mA
mA
mA
mA
Supply current
Notes:
1.
This value represents the current usage when there are no switching digital inputs, MCLK is applied and the chip is in
power down mode
Digital supply DVDD must never be more than 0.3V greater than AVDD.
2.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, T
A
= +25
o
C, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Digital Logic Levels (TTL Levels)
Input LOW level
V
IL
Input HIGH level
V
IH
Output LOW
V
OL
Output HIGH
V
OH
I
OH
= 1mA
Analogue Reference Levels
Reference voltage
MIN
TYP
MAX
UNIT
0.8
V
V
V
V
2.0
I
OL
= 1mA
AGND + 0.3V
DVDD – 0.3V
VMID
AVDD/2 -
50mV
AVDD/2
AVDD/2 +
50mV
V
Potential divider resistance
DAC Output (Load
= 10k
50pF)
0dBFs Full scale output voltage
R
VMID
8.7k
At DAC outputs
2 x
AVDD/5
111
Vrms
SNR (Note 1,2,3)
A-weighted,
@ fs = 48kHz
A-weighted
@ fs = 96kHz
A-weighted
@ fs = 192kHz
A-weighted,
@ fs = 48kHz
AVDD = 3.3V
A-weighted
@ fs = 96kHz
AVDD = 3.3V
Non ‘A’ weighted @ fs
= 48kHz
1kHz, 0dBFs
1kHz, -60dBFs
105
dB
SNR (Note 1,2,3)
109
dB
SNR (Note 1,2,3)
109
dB
SNR (Note 1,2,3)
105
dB
SNR (Note 1,2,3)
102
dB
SNR (Note 1,2,3)
108
dB
THD (Note 1,2,3)
THD+N (Dynamic range, Note 2)
DAC channel separation
-100
111
100
-80
dB
dB
dB
105
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