WM8501 Wolfson Microelectronics plc, WM8501 Datasheet - Page 7

• Manufacturer Part Number: WM8501
• Description: 24-bit 192khz Stereo Dac With 1.7vrms Line Driver
• Manufacturer: Wolfson Microelectronics plc

Production Data
6.
7.
8.
9.
MASTER CLOCK TIMING
Figure 1 Master Clock Timing Requirements
DIGITAL AUDIO INTERFACE
Figure 2 Digital Audio Data Timing
w
Test Conditions
VDD = 5V, GND = 0V, T
PARAMETER
System Clock Timing Information
MCLK Master clock pulse width high
MCLK Master clock pulse width low
MCLK Master clock cycle time
MCLK Duty cycle
Time from MCLK stopping to power
down.
Dynamic range (dB) – DNR is a measure of the difference between the highest and lowest portions of a signal. Normally a
THD measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB to it. (e.g. THD @
-60dB= -32dB, DR= 92dB).
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 the
other. Normally measured by sending a full scale signal down one channel and measuring the other.
MCLK
A
= +25
o
C, fs = 48kHz, MCLK = 256fs unless otherwise stated.
SYMBOL
t
t
t
MCLKH
MCLKL
MCLKY
t
MCLKL
t
MCLKY
TEST CONDITIONS
t
MCLKH
40:60
MIN
1.5
20
8
8
TYP
PD, Rev 4.2, July 2009
60:40
MAX
12
WM8501
UNIT
ns
ns
ns
s
7