WM8591(Rev1_0) 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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WM8591 Datasheet PDF : 50 Pages
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WM8591
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.
ADC Channel Separation
1kHz Input
85
dB
Channel Level Matching
1kHz signal
0.1
dB
Channel Phase Deviation
1kHz signal
0.06
Degree
Programmable Gain Step Size
0.25
0.5
0.75
dB
Programmable Gain Range
1kHz Input
-21
+24
dB
(Analogue)
Programmable Gain Range
1kHz Input
-103
-21.5
dB
(Digital)
Mute Attenuation (Note 4)
1kHz Input, 0dB gain
97
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
59
dB
Input Resistance
20Hz to 20kHz
56
dB
100mVpp
PGA Gain = +24dB
4.5
kΩ
PGA Gain = 0dB
37.4
kΩ
PGA Gain = -21dB
69.0
kΩ
Input Capacitance
1
pF
Supply Current
Analogue supply current
AVDD = 5V
54
mA
Digital supply current
DVDD = 3.3V
7.4
mA
Analogue Powerdown Current
AVDD = 5V
132
µA
Digital Powerdown Current
DVDD = 3.3V
2.7
µA
Crosstalk
DAC to ADC
1kHz signal, ADC fs =
115
dB
48kHz, DAC fs =
44.1kHz
20kHz signal, ADC fs =
130
dB
48kHz, DAC fs =
44.1kHz
ADC to DAC
1kHz signal, ADC fs =
131
dB
48kHz, DAC fs =
44.1kHz
20kHz signal, ADC fs =
138
dB
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.
w
PP Rev 1.0 May 2005
7
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