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參數(shù)資料
| 型號(hào)： | WM8722 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs |
| 中文描述： | 立體聲DAC，具有集成的音調(diào)發(fā)生器和線/變平輸出 |
| 文件頁(yè)數(shù)： | 4/23頁(yè) |
| 文件大小： | 438K |
| 代理商： | WM8722 |
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WM8722
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 1.5 May 2000
4
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, T
A
= +25
o
C, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
DAC Circuit Specifications
SNR (Note 1 and 2)
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
AVDD, DVDD = 5V, fs = 48kHz
AVDD, DVDD = 3.3V, fs = 48kHz
AVDD, DVDD = 5V, fs = 96kHz
0dB
-60dB
±
0.25dB
-3dB
92
102
dB
100
-95
102
dB
THD (Note 2)
Dynamic range (Note 2)
Passband
Stopband
Passband ripple
Stopband Attenuation
Channel Separation
Gain mismatch
channel-to-channel
Digital Logic Levels
Input LOW level
Input HIGH level
Output LOW level
Output HIGH level
Analogue Output Levels
Output level
-80
dB
dB
0.4535fs
0.491fs
±
0.25
-
100
±1
dB
dB
dB
f > 0.55fs
±5
%FSR
V
IL
V
IH
V
OL
V
OH
0.8
V
V
2.0
I
OL
= 2mA
I
OH
= 2mA
AVSS
+ 0.3V
AVDD
- 0.3V
Into 10kohm, full scale 0dB,
(5V supply)
Into 10kohm, full scale 0dB,
(3.3V supply)
To midrail or AC coupled
(5V supply)
To midrail or AC coupled
(3.3V supply)
5V or 3.3V
1.1
Vrms
0.66
Vrms
1
kohms
Minimum resistance load
600
ohms
Maximum capacitance
load
Output DC level
Reference Levels
Potential divider
resistance
Voltage at CAP
POR
POR threshold
Analogue Mixer Specifications
SNR
THD
100
pF
AVDD/2
V
AVDD to CAP and CAP to AGND
90
kohms
AVDD/2
1.2
1.6
2.0
V
92
100
-96
dB
dB
1V rms output, Into 10kohm, 50pF
load
-92
Dynamic Range
Channel Separation
Output voltage
Output current source
Output current sink
100
100
dB
dB
Vrms
mA
mA
Into 10kohm
1.5
2
3
2
1.5
Input voltage, MIXINL/R
AC coupled
2
Vrms
MIXINL/R input resistance
MIXINL/R input resistance
0dB
50
20
kohm
kohm
(at 12dB trim)
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