wm8742 Wolfson Microelectronics plc, wm8742 Datasheet - Page 11

• Manufacturer Part Number: wm8742
• Description: 24-bit 192khz Dac With Advanced Digital Filtering
• Manufacturer: Wolfson Microelectronics plc

Production Data
Notes:
1.
2.
w
TEST CONDITIONS
AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, T
stated.
PARAMETER
Internal Analogue Filter
Bandwidth
Passband edge response
Analogue Output Levels
PCM full scale differential
output level
DSD Direct differential
output level
DSD Plus differential output
level
Minimum resistance load
Maximum capacitance load
Output DC level
Reference Levels
Potential divider resistance
Voltage at VMIDL/VMIDR
weighted over a 20Hz to 20kHz bandwidth.
All performance measurements done with 20kHz low pass filter. Failure to use such a filter will result in higher THD
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.
Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’
SYMBOL
AVDD to VMIDL/VMIDR and
Into 10kΩ load, 0dBFS input
Into 10kΩ load, 0dB
Into 10kΩ load, 0dB
VMIDL/VMIDR to AGND
To midrail or AC coupled
TEST CONDITIONS
A
= +25
20kHz
-3dB
o
C, 1kHz test signal, fs = 48kHz, MCLK = 512fs unless otherwise
DSD
DSD
input
input
MIN
AVDD/2
AVDD/2
-0.0077
0.948
0.991
TYP
474
10
2
2
1
PD, Rev 4.2, August 2009
MAX
WM8742
UNIT
V
V
V
kHz
dB
kΩ
kΩ
nF
V
V
RMS
RMS
RMS
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