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AK4121A 데이터시트 PDF




Asahi Kasei Microsystems에서 제조한 전자 부품 AK4121A은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 AK4121A 기능
기능 ASYNCHRONOUS SAMPLE RATE CONVERTER
제조업체 Asahi Kasei Microsystems
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AK4121A 데이터시트, 핀배열, 회로
www.Da[tAaSKhe4et14U21.coAm]
AK4121A
Asynchronous Sample Rate Converter
GENERAL DESCRIPTION
The AK4121A is a stereo asynchronous sample rate converter. The input sample rate ranges from
8kHz to 96kHz. The output sample rate is 32kHz, 44.1kHz, 48kHz or 96kHz. Since the internal PLL
eliminates the need for a master clock in slave mode, the AK4121 simplifies the system design.
Therefore, the AK4121A is suitable for applications requiring multiple sample rates, such as Car Audio,
DVD recorders, and digital audio recording.
FEATURES
† Stereo asynchronous sample rate converter
† Input sample rate range (FSI): 8kHz to 96kHz
† Output sample rate (FSO): 32kHz/44.1kHz/48kHz/96kHz
† Input to output Sample rate ratio: FSO/FSI = 0.33 to 6
† THD+N: –113dB
† I/F format: MSB justified, LSB justified (24/20/16bit) and I2S
† Clock for Master mode: 256/384/512/768fso
† De-emphasis filter: 32kHz/44.1kHz/48kHz
† SRC Bypass mode
† Soft Mute function
† Power Supply: VDD: 3.0 to 3.6V, TVDD: 3.0 to 5.5V (for input tolerant)
† Ta: –40 to +85°C
PDN
DEM0 DEM1
SMUTE
TVDD VDD DVSS
SDTI
ILRCK
IBICK
Serial
Audio
I/F
De-em
filter
Sample
Rate
Converter
soft
mute
AVSS
FILT
PLL
Serial
Audio
I/F
(MCLK)
SDTO
OLRCK
OBICK
CMODE2
CMODE1
CMODE0
IDIF2 IDIF1 IDIF0
ODIF1 ODIF0
MS0337-E-02
-1-
2007/07




AK4121A pdf, 반도체, 판매, 대치품
www.Da[tAaSKhe4et14U21.coAm]
(AVSS=DVSS=0V; Note 1)
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
min
Power Supplies: Core
VDD
0.3
Input Buffer
TVDD
0.3
|AVSS-DVSS| (Note 1)
Δ GND
Input Current, Any Pin Except Supplies
IIN -
Input Voltage
VIN 0.3
Ambient Temperature (Power applied)
Ta 40
Storage Temperature
Tstg 65
max
4.6
6.0
0.3
±10
TVDD+0.3
85
150
Note 1. All voltages with respect to ground.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
Units
V
V
V
mA
V
°C
°C
RECOMMENDED OPERATING CONDITIONS
(AVSS=DVSS=0V; Note 2)
Parameter
Symbol
min
typ
Power Supplies: Core
VDD
3.0
3.3
Input Buffer
TVDD
VDD
5
Note 2. All voltages with respect to ground.
max Units
3.6 V
5.5 V
SRC PERFORMANCE
(Ta=4085°C; VDD=3.03.6V; TVDD=3.0~5.5V; data=20bit; measurement bandwidth=20Hz~FSO/2;
unless otherwise specified.)
Parameter
Symbol min typ max
Resolution
20
Input Sample Rate
FSI 8
96
Output Sample Rate
FSO 32
96
Dynamic Range (Input= 1kHz, 60dBFS, Note 3)
FSO/FSI=44.1kHz/48kHz
FSO/FSI=48kHz/44.1kHz
- 114 -
- 114 -
FSO/FSI=32kHz/48kHz
FSO/FSI=96kHz/32kHz
- 114 -
- 115 -
Worst Case (FSO/FSI=48kHz/96kHz)
112 -
-
Dynamic Range (Input= 1kHz, 60dBFS, A-weighted, Note 3)
FSO/FSI=44.1kHz/48kHz
- 117 -
THD+N
(Input= 1kHz, 0dBFS, Note 3)
FSO/FSI=44.1kHz/48kHz
FSO/FSI=48kHz/44.1kHz
FSO/FSI=32kHz/48kHz
FSO/FSI=96kHz/32kHz
Worst Case (FSO/FSI=48kHz/8kHz)
- 113 -
- 112 -
- 113 -
- 111 -
- - 103
Ratio between Input and Output Sample Rate
(FSO/FSI, Note 4, Note 5)
FSO/FSI 0.33
6
Units
Bits
kHz
kHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
-
Note 3. Measured by Rohde & Schwarz UPD04, Rejection Filter= wide, 8192point FFT.
Note 4. The “0.33” is the ratio of FSO/FSI when FSI is 96kHz and FSO is 32kHz
Note 5. The “6” is the ratio when FSI is 8kHz and FSO is 48kHz.
MS0337-E-02
-4-
2007/07

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AK4121A 전자부품, 판매, 대치품
Timing Diagram
MCLK
LRCK
BICK
www.Da[tAaSKhe4et14U21.coAm]
1/fCLK
tCLKH
tCLKL
1/fs
VIH
VIL
dCLK=tCLKH x fCLK, tCLKL x fCLK
VIH
VIL
tBCK
tBCKH
tBCKL
Figure 1. Clock Timing
VIH
VIL
LRCK
BICK
SDTO
SDTI
tBLR
tLRB
VIH
VIL
tLRS
tSDS
tSDH
VIH
VIL
tBSD
70%VDD
30%VDD
Figure 2. Audio Interface Timing at Slave Mode
VIH
VIL
MS0337-E-02
-7-
2007/07

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