ak7714 AKM Semiconductor, Inc., ak7714 Datasheet - Page 13

• Manufacturer Part Number: ak7714
• Description: 20-bit Audio Codec With Dsp And Delay Ram
• Manufacturer: AKM Semiconductor, Inc.

[ASAHI KASEI]
(4) Digital filter characteristics
1) ADC Section:
Pass band (-0.02 dB)
Stop band
Pass band ripple
Stop band attenuation (Notes 3,4)
Group delay distortion
Group delay (Ts = 1/fs)
Note: 1. These frequencies scale with the sampling frequency (fs).
2) DAC section
Digital filter
Pass band ±0.07 dB
Stop band
Pass band ripple
Stop band attenuation
Group delay (Ts = 1/fs )
Digital filter + Analog filter
Amplitude characteristics
Note: 1. The pass band and stop band frequencies are proportional to "fs" (system sampling rate), and are represente
M0018-E-00
Values described below are design values cited as references. These are not for guaranteeing the characteristics.
(Ta = 25 C; AVDD, DVDD, AVB, DVB = 5.0 V ±5%; fs = 44.1 kHz)
(Ta = 25 C; AVDD, DVDD, AVB, DVB = 5.0 V ±5%; fs = 44.1 kHz)
2. The pass band is from DC to 19.75 kHz when fs = 44.1 kHz.
3. The stop band is from 27.56 kHz to 2.795 MHz when fs = 44.1 kHz.
4. When fs = 44.1 kHz, the analog modulator samples analog input at 2.8224 MHz.
2. The caluculating delay time which occurred by digital filtering.
The input signal is not attenuate dBy the digital filter in the multiple bands (n x 2.8224 MHz ± 20.21 kHz ;
n = 0, 1, 2, 3...) of the sampling frequency.
PB = 0.4535 fs(@ -0.06 dB) and SB = 0.546 fs, respectively.
This time is from setting the 20-bit data of both channels on input register to the output of analog signal.
(-6.0 dB)
Parameter
Parameter
(-6.0 dB)
0 to 20.0 kHz
(Note 1)
(Note 2)
(Note 1)
(Note 1)
(Note 2)
Symbol
Symbol
GD
GD
PB
SB
PR
SA
PB
SB
PR
SA
GD
- 13 -
24.35
24.1
Min
Min
47
80
0
0
0
-
-
22.05
29.3
15.3
±0.5
Typ
Typ
±0.005
20.00
22.05
±0.07
20.0
Max
Max
0
-
[AK7714]
Unit
kHz
kHz
kHz
Unit
kHz
kHz
kHz
dB
dB
dB
dB
dB
µs
Ts
Ts
‘98/07