參數資料
型號: WM8756EFT
廠商: Wolfson Microelectronics
英文描述: 192KHZ SIX CHANNEL SACD COMPATIBLE AUDIO DAC
中文描述: 192kHz的六聲道SACD的兼容的音頻數模轉換器
文件頁數: 6/39頁
文件大小: 330K
代理商: WM8756EFT
WM8756
Advance Information
AI Rev 1.3 October 2001
6
Test Conditions
AVDD = DVDD = 3V, AGND = 0V = DGND = 0V, T
A
= +25
o
C, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
SNR (Note 1,2,3)
Non ‘A’ weighted @ fs
MIN
TYP
103
MAX
UNIT
dB
= 48kHz
AVDD=DVDD=5V
1KHz, 0dBFs
1kHz, -60dBFs
THD (Note 1,2,3)
THD+N (Dynamic range, Note 2)
DAC channel separation
Analogue Output Levels
Output level
-90
100
-95
-106
<95
dB
dB
dB
Load = 10k ohms,
0dBFS
Load = 10k ohms,
0dBFS,
(AVDD = 3.3V)
1.1
V
rms
0.73
V
rms
Gain mismatch
channel-to-channel
Minimum resistance load
±1
%FSR
To midrail or a.c.
coupled
To midrail or a.c.
coupled
(AVDD = 3.3V)
5V or 3.3V
1
kOhms
1
kOhms
Maximum capacitance load
Output d.c. level
100
pF
V
AVDD1-
AGND/2
Power On Reset (POR)
POR threshold
2.0
V
Table 3 AC Electrical Characteristics
Notes:
1.
Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’ weighted
over a 20Hz to 20kHz bandwidth.
2.
All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use such a
filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in the Electrical
Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic specification
values.
3.
CAP decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
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