WM8501 Wolfson Microelectronics plc, WM8501 Datasheet - Page 6

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

WM8501
ELECTRICAL CHARACTERISTICS
Notes:
1.
2.
3.
4.
5.
w
Test Conditions
AVDD = 5V, DVDD = 3.3V, GND = 0V, T
PARAMETER
Digital Logic Levels (TTL Levels)
Input LOW level
Input HIGH level
Output LOW
Output HIGH
Analogue Reference Levels
Reference voltage (VMID)
Potential divider resistance
DAC Output (Load = 10k . 50pF)
0dBFs Full scale output voltage
Signal to Noise Ratio (Note
5,6,7)
Dynamic Range (Note 2, 6)
Total Harmonic Distortion
DAC channel separation
Analogue Output Levels
Output level (line output)
Minimum resistance load (line
output)
Output level (Headphone output)
Minimum resistance load
(Headphone output)
Gain mismatch
channel-to-channel
Output d.c. level
Supply Current
Analogue supply current
Digital supply current
Power down current (note 4)
(Note 7)
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.
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 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.
VMID pin decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
Power down occurs 1.5 s after MCLK is stopped.
Signal-to-noise ratio (dB) – SNR is a measure of the difference in level between the full scale output and the output with
no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
SYMBOL
DNR
THD
R
SNR
V
V
A
V
V
CAP
OH
OL
IH
IL
= +25
o
C, fs = 48kHz, MCLK = 256fs unless otherwise stated.
A-weighted, -60dB full
Load = 10k , 0dBFS
1kHz, Load = 10k ,
Load = 16 , 0dBFS
TEST CONDITIONS
AVDD to VMID and
AVDD=DVDD=5V
At DAC outputs
To midrail or a.c.
To midrail or a.c.
@ fs = 192kHz
@ fs = 48kHz
VMID to GND
A-weighted,
DVDD = 3.3V
@ fs = 96kHz
A-weighted
A-weighted
AVDD = 5V
DVDD = 5V
scale input
I
I
OL
OH
coupled
coupled
0dBFS
= 2mA
= 2mA
DVDD – 0.3V
AVDD/5
1.6 x
MIN
2.0
90
90
AVDD/2
AVDD/5
AVDD/2
1.7 x
0.01
TYP
100
100
820
-88
1.7
1.0
4.5
50
97
97
16
±1
93
9
8
DGND + 0.3V
AVDD/5
1.8 x
PD, Rev 4.2, July 2009
MAX
-78
0.8
Production Data
Vrms
%FSR
Vrms
Vrms
UNIT
mA
mA
mA
mA
dB
k
dB
dB
dB
dB
dB
V
V
V
V
V
V
6