wm8580a Wolfson Microelectronics plc, wm8580a Datasheet - Page 12
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wm8580a
Manufacturer Part Number
wm8580a
Description
Multichannel Codec With S/pdif Transceiver
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8580A.pdf
(103 pages)
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Part Number:
WM8580A
Manufacturer:
WOLFSON
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WM8580
TERMINOLOGY
1.
2.
3.
4.
5.
6.
MASTER CLOCK TIMING
Figure 1 Master Clock Timing Requirements
Table 3 Master Clock Timing Requirements
w
Test Conditions
AVDD, PVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, PGND, DGND = 0V, T
PARAMETER
System Clock Timing Information
ADCMCLK and MCLK System clock
pulse width high
ADCMCLK and MCLK System clock
pulse width low
ADCMCLK and MCLK System clock
cycle time
ADCMCLK and MCLK Duty cycle
ADCMCLK/
MCLK
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB
to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output
Dynamic range (dB) - DNR is a measure of the difference between the highest and lowest portions of a signal.
THD (dB) - THD is a ratio, of the rms values, of Distortion/Signal.
Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).
Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
SYMBOL
t
t
t
MCLKH
MCLKL
MCLKY
t
MCLKL
t
MCLKY
TEST CONDITIONS
t
MCLKH
40:60
MIN
11
11
28
A
= +25
o
TYP
C
PD, Rev 4.7, March 2009
60:40
MAX
Production Data
UNIT
ns
ns
ns
12
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