WM9707
Advanced Information
Test Characteristics:
AVSS = 5V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated
DVDD = 3.3V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DAC Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR A-weighted (Note 1)
85
95
1.0
90
dBv
Vrms
dBv
Hz
Full scale output voltage
THD
VREF = 2.5V
-3dBfs input
74 (0.02%)
20
Frequency response
Transition band
Stop band
19,200
28,800
19,200
28,800
Hz
Hz
Out of band rejection
Spurious tone reduction
PSRR
-40
-100
40
dB
dB
20 to 20kHz
dB
ADC Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR A-weighted (Note 1)
75
92
1.0
95
dB
Vrms
dB
ADC input for full scale output
THD
VREF = 2.5V
-6dBv input
74
20
Frequency response
Transition band
Stop band
19,200
28,800
Hz
19,200
28,800
-74
Hz
Hz
Stop band rejection
PSRR
dB
20 to 20kHz
40
dB
Mixer Circuit Specifications (AVDD = 5V) 48kHz sampling
SNR CD path A-weighted (Note
1)
90
85
100
95
dB
dB
SNR Other paths A-weighted
(Note 1)
Maximum input voltage
AVSS
1.0
1.0
1.8
AVDD
20,000
Vrms
Vrms
Maximum output voltage on
LINEOUT
THD
0dBv input
74
20
90
dB
Frequency response (+/-1dB)
Input impedance (CD inputs)
Hz
At any gain
At max gain
At 0db gain
At max gain
At 0db gain
20 to 20kHz
15
20
kohm
kohm
kohm
kohm
kohm
dB
Input impedance (other mixer
inputs)
10
50
10
55
100
30
Input impedance MIC inputs
110
50
PSRR
DAC Circuit Specifications (AVDD = 3.3V) 48kHz sampling
SNR A-weighted (Note 1)
92
0.7
85
dB
Vrms
dB
Full scale output voltage
THD
VREF = 1.65V
-3dBFS input
Frequency response
Transition band
Stop band
Hz
Hz
Hz
Out of band rejection
Spurious tone reduction
PSRR
dB
dB
20 to 20kHz
dB
WOLFSON MICROELECTRONICS LTD
AI Rev 2.2 January 2001
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
