Product Preview
WM8591
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.
ADC Channel Separation
Channel Level Matching
Channel Phase Deviation
Programmable Gain Step Size
Programmable Gain Range
(Analogue)
1kHz Input
1kHz signal
1kHz signal
85
0.1
dB
dB
0.06
0.5
Degree
dB
0.25
-21
0.75
+24
1kHz Input
1kHz Input
dB
Programmable Gain Range
(Digital)
-103
-21.5
dB
Mute Attenuation (Note 4)
Power Supply Rejection Ratio
1kHz Input, 0dB gain
1kHz 100mVpp
97
59
56
dB
dB
dB
PSRR
20Hz to 20kHz
100mVpp
Input Resistance
PGA Gain = +24dB
PGA Gain = 0dB
PGA Gain = -21dB
4.5
37.4
69.0
1
kΩ
kΩ
kΩ
pF
Input Capacitance
Supply Current
Analogue supply current
Digital supply current
Analogue Powerdown Current
Digital Powerdown Current
Crosstalk
AVDD = 5V
DVDD = 3.3V
AVDD = 5V
54
7.4
132
2.7
mA
mA
µA
DVDD = 3.3V
µA
DAC to ADC
1kHz signal, ADC fs =
48kHz, DAC fs =
44.1kHz
115
130
131
138
dB
dB
dB
dB
20kHz signal, ADC fs =
48kHz, DAC fs =
44.1kHz
ADC to DAC
1kHz signal, ADC fs =
48kHz, DAC fs =
44.1kHz
20kHz signal, ADC fs =
48kHz, DAC fs =
44.1kHz
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. All performance measurement done using certain timings conditions (Please refer to section ‘Digital Audio Interface’).
4. A better MUTE Attenuation can be achieved if the ADC gain is set to minimum.
PP Rev 1.0 May 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
