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AK4954AEN Datasheet, PDF (14/26 Pages) Asahi Kasei Microsystems – 32bit Stereo CODEC with MIC/HP/SPK-AMP | |||
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[AK4954A]
ADC ã·ã§ã¼ããã£ã¬ã¤ã»ã·ã£ã¼ããã¼ã«ãªãã»ãã£ã«ã¿ç¹æ§ (fs=44.1kHz)
(Ta = -30 ~ 85°C; AVDD=2.5 ~ 3.5V, DVDD =1.6 ⼠1.98V, TVDD=(DVDD-0.2) ~ 3.5V, SVDD=0.9 ⼠5.5V;
SDAD bit = â1â)
Parameter
Symbol
min
typ
max
Unit
ADC Digital Filter (Decimation LPF):
Passband (Note 31) +0.08dB ~ â0.23dB
PB
â0.74dB
â1.41dB
â8.0dB
0
-
18.8
kHz
-
19.4
-
kHz
-
19.9
-
kHz
-
22.1
-
kHz
Stopband (Note 31)
SB
26.1
-
-
kHz
Passband Ripple
PR
-
-
±0.16
dB
Stopband Attenuation
SA
61
-
-
dB
Group Delay (Note 32)
Group Delay Distortion
GD
-
ÎGD
-
4.3
-
1/fs
-
±1.8
1/fs
ADC Digital Filter (HPF): HPFC1-0 bits = â00â
Frequency Response
â3.0dB
FR
-
3.4
-
Hz
(Note 31)
â0.5dB
-
10
-
Hz
â0.1dB
-
22
-
Hz
ADC ã·ã§ã¼ããã£ã¬ã¤ã»ã·ã£ã¼ããã¼ã«ãªãã»ãã£ã«ã¿ç¹æ§ (fs=96kHz)
(Ta = -30 ~ 85°C; AVDD=2.5 ~ 3.5V, DVDD =1.6 ⼠1.98V, TVDD=(DVDD-0.2) ~ 3.5V, SVDD=0.9 ⼠5.5V;
SDAD bit = â1â)
Parameter
Symbol
min
typ
max
Unit
ADC Digital Filter (Decimation LPF):
Passband (Note 31) +0.08dB ~ â0.23dB
PB
0
-
40.9
kHz
â0.74dB
â1.41dB
-
42.2
-
kHz
-
43.3
-
kHz
â8.0dB
-
48.0
-
kHz
Stopband (Note 31)
SB
56.8
-
-
kHz
Passband Ripple
PR
-
-
±0.16
dB
Stopband Attenuation
SA
61
-
-
dB
Group Delay (Note 32)
GD
-
4.3
-
1/fs
Group Delay Distortion
ÎGD
-
-
±1.3
1/fs
ADC Digital Filter (HPF): HPFC1-0 bits = â00â
Frequency Response
(Note 31)
â3.0dB
FR
â0.5dB
â0.1dB
-
7.4
-
Hz
-
21.8
-
Hz
-
47.9
-
Hz
Note 31. åæ¯å¹
ç¹æ§ã®å¨æ³¢æ°ã¯ fs (ãµã³ããªã³ã°ã¬ã¼ã)ã«æ¯ä¾ãã¾ããåå¿ç㯠1kHz ãåºæºã«ãã¾ãã
Note 32. ãã£ã¸ã¿ã«ãã£ã«ã¿ã«ããé
延æ¼ç®ã§ãã¢ããã°ä¿¡å·ãå
¥åããã¦ãã両ãã£ãã«ã® 32 ããããã¼
ã¿ãåºåã¬ã¸ã¹ã¿ã«ã»ãããããã¾ã§ã®æéã§ããããã°ã©ããã«ãã£ã«ã¿ (1 次 HPF + 4-band
Equalizer + ALC + Equalizer) ãééãããã¹ãé¸æããå ´åã® Group Delay 㯠IIR ãã£ã«ã¿ã«ããä½
ç¸å¤åãç¡ãå ´åã§ä¸è¨è¨è¼ã®å¤ã«å¯¾ãã¦ã4/fs å¢å ãã¾ãã
MS1542-J-00-PB
- 14 -
2013/06
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