WM8522
Production Data
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
DVDD
TEST CONDITIONS
MIN
2.7
TYP
MAX
3.6
UNIT
Digital supply range
Analogue supply range
Ground
V
V
V
V
AVDD, VREFP
AGND, VREFN, DGND
4.5
5.5
0
0
Difference DGND to AGND
-0.3
+0.3
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
VIH
0.3 x DVDD
0.1 x DVDD
V
V
V
V
Input HIGH level
0.7 x DVDD
0.9 x DVDD
Output LOW
VOL
VOH
I
OL=1mA
Output HIGH
IOH= -1mA
Analogue Reference Levels
Reference Voltage
VVMID
RVMID
VREFP/2
50
V
Potential Divider Resistance
(VREFP to VMID) and
(VMID to VREFN)
kΩ
DAC Performance (Load = 10kΩ, 50pF)
0dBFs Full Scale Output
Voltage
1.6 x
VREFP/5
95
1.7 x
VREFP/5
102
1.8 x
Vrms
dB
VREFP/5
SNR (Note 1,2,4)
SNR (Note 1,2,4)
SNR (Note 1,2,4)
A-weighted,
@ fs = 48kHz
A-weighted
101
101
102
dB
@ fs = 96kHz
A-weighted
dB
@ fs = 192kHz
Dynamic Range (Note 2,4)
DNR
A-weighted, -60dB full
scale input
95
dB
Total Harmonic Distortion (THD)
Mute Attenuation
1kHz, 0dBFs
-85
100
100
50
-78
dB
dB
dB
dB
dB
1kHz Input, 0dB gain
DAC Channel Separation
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
20Hz to 20kHz
100mVp-p
45
Supply Current
Analogue Supply Current
Digital Supply Current
AVDD, VREFP = 5V
DVDD = 3.3V
12
10
mA
mA
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.
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. VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
PD Rev 4.0 July 2006
6
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
