ak7742 ETC-unknow, ak7742 Datasheet - Page 10

• Manufacturer Part Number: ak7742
• Description: 24bit 2ch Adc + 24bit 4ch Dac With Audio Dsp
• Manufacturer: ETC-unknow

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(Ta=-20ºC ~70ºC, AVDD=DVDD=3.0~3.6V, fs=48kHz;
Pass band (±0.005dB)
Stop band
Pass band ripple
Stop band attenuation
Group delay distortion
Group delay (Ts=1/fs)
Digital filter + Analog filter characteristics
Amplitude characteristic 20Hz~20.0kHz
Note 17. Each parameter is related to the sampling frequency (fs). HPF response is not included.
Note 18. Pass band is from DC to 21.5kHz when fs=48kHz.
Note 19. Stop band is from 26.5kHz to 3.0455MHz when fs=48kHz.
Note 20. When fs=48kHz, the analog modulator samples the analog input at 3.072MHz. Therefore the input signal is not
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(Ta=-20ºC ~70ºC, AVDD=DVDD=3.0~3.6V, fs=48kHz;
Digital filter
Pass band ±0.07dB
Stop band
Pass band ripple
Stop band attenuation
Group delay
Digital filter + Analog filter
Amplitude characteristic 0~20.0kHz
Note 21. Pass band and Stop band parameter is related to sampling frequency(fs). PB=0.4535fs (at-0.05dB),
Note 22.The digital filter’s delay is calculated as the time from setting 24-bit data into the input register until an analog
Rev.0.5b_PB
ADC
DAC
attenuated by the digital filter in multiple bands (n x 3.072MHz ±21.99kHz; n=0, 1, 2, 3 …) of the sampling
frequency.
signal is output.
SB=0.5465fs.
(-0.02dB)
(-6.0dB)
(-6.0dB)
Parameter
Parameter
(Ts=1/fs)
(Note
(Note
(Note
(Note
19,
21)
22)
(Note
21)
(Note
Note
DIGITAL FILTER CHARACTERISTICS
18)
20)
18)
Symbol
GD
PB
SB
SA
PR
Symbol
∆GD
GD
SA
PB
SB
PR
-
Note
Note
10
26.2
min
64
26.5
min
0
-
-
-
80
0
17)
17)
21.768
24.00
±0.01
24.0
±0.5
typ
typ
30
24
±0.005
±0.01
max
max
21.5
21.7
0
-
[AK7742]
Unit
Unit
kHz
kHz
kHz
kHz
kHz
kHz
kHz
dB
dB
dB
dB
dB
dB
μs
Ts
Ts
2008/08