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Número de pieza | AK4122 | |
Descripción | 24-Bit 96kHz SRC | |
Fabricantes | AKM | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de AK4122 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
No Preview Available ! ASAHI KASEI
[AK4122]
AK4122
24-Bit 96kHz SRC with DIR
GENERAL DESCRIPTION
The AK4122 is a digital sample rate converter (SRC) with the digital audio receiver (DIR). The input
sample rate ranges from 8kHz to 96kHz. The output sample rate is 32kHz, 44.1kHz, 48kHz or 96kHz. By
using the AK4122, the system can take very simple configuration because the AK4122 has an internal
PLL and does not need any master clock at slave mode. Then the AK4122 is suitable for the application
interfacing to different sample rates like Car Audio, DVD recorder, etc.
FEATURES
1. SRC
• Asynchronous Sample Rate Converter
• Input Sample Rate Range (fsi) : 8kHz ∼ 96kHz
• Output Sample Rate (fso) : 32kHz, 44.1kHz, 48kHz, 96kHz
• Input to Output Sample Rate Ratio : 0.33 to 6
• THD+N : −113dB
• I/F format : MSB justified, LSB justified (16/24bit) and I2S compatible
• Clock for Master mode : 256/384/512/768fs
• SRC Bypass mode
• Soft Mute Function
2. DIR
• 4-Channel Inputs Selector & 1-Channel Through Output
• AES3, IEC60958, S/PDIF, EIAJ CP1201 Compatible
• Low Jitter Analog PLL
• PLL Lock Range : 32kHz ∼ 96kHz
• Auto detection
- Non-PCM Bit Stream
- DTS-CD Bit Stream
- Validity Flag
- Sampling Frequency (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz)
- Unlock & Parity Error
- DAT Start ID
• 40-bit Channel Status Buffer
• Burst Preamble bit Pc, Pd Buffer for Non-PCM bit streams
• Q-subcode Buffer for CD bit streams
3. 4-wire Serial µP Interface
4. Power Supply
• AVDD: 3.0 ∼ 3.6V (typ. 3.3V)
• DVDD: 3.0 ∼ 3.6V (typ. 3.3V)
5. Ta = −10 ∼ 70°C
6. Package : 48pin LQFP
MS0267-E-03
-1-
2004/08
1 page ASAHI KASEI
[AK4122]
25 R
26 AVSS
27 PDN
28 LRCK1
29 BICK1
30 SDTI
31 DVSS
32 DVDD
33 MCLK2
34 LRCK2
35 BICK2
36 SDTIO
37 INT0
38 INT1
39 TX
40 SDTO
41 BICK
42 LRCK
43 OMCLK
44 DVSS
45 DVDD
46 BVSS
47 CSN
48 CCLK
External Resistor Pin
- 12kΩ±5% resistor should be connected to AVSS externally.
- Analog Ground Pin
Power-Down Mode Pin
I
“H”: Power up, “L”: Power down reset and initializes the control register.
I Input Channel Clock Pin
I Audio Serial Data Clock Pin
I Audio Serial Data Input Pin
- Digital Ground Pin
- Digital Power Supply Pin, 3.0 ∼ 3.6V
I Master Clock Input Pin
I/O Input / Output Channel Clock Pin
I/O Audio Serial Data Clock Pin
I/O Audio Serial Data Input / Output Pin
O Interrupt 0 Pin
O Interrupt 1 Pin
O Transmitter Output Pin
O Audio Serial Data Output Pin
I/O Audio Serial Data Clock Pin
I/O Output Channel Clock Pin
I Master Clock Input Pin
- Digital Ground Pin
- Digital Power Supply Pin, 3.0 ∼ 3.6V
Substrate Ground Pin
-
This pin should be connected to AVSS.
I Chip Select Pin
I Control Data Clock Pin
Note: All input pins except internal biased pins should not be left floating.
MS0267-E-03
-5-
2004/08
5 Page ASAHI KASEI
Parameter
Output for PORT3 (Slave mode)
BICK Period
BICK Pulse Width Low
Pulse Width High
LRCK Edge to BICK “↑”
(Note 11)
BICK “↑” to LRCK Edge
(Note 11)
LRCK to SDTO (MSB) (Except I2S mode)
BICK “↓” to SDTO
Output for PORT2 (Master mode)
BICK2 Frequency
BICK2 Duty
BICK2 “↓” to LRCK2
BICK2 “↓” to SDTIO
Output for PORT3 (Master mode)
BICK Frequency
BICK Duty
BICK “↓” to LRCK
BICK “↓” to SDTO
Control Interface Timing
CCLK Period
(Note 12)
CCLK Pulse Width Low
Pulse Width High
CDTI Setup Time
CDTI Hold Time
CSN “H” Time
CSN “↓” to CCLK “↑”
CCLK “↑” to CSN “↑”
CDTO Delay
CSN “↑” to CDTO Hi-Z
Reset Timing
PDN Pulse Width
(Note 13)
Symbol
tBCK
tBCKL
tBCKH
tLRB
tBLR
tLRS
tBSD
fBCK
dBCK
tMBLR
tBSD
fBCK
dBCK
tMBLR
tBSD
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
tCSH
tDCD
tCCZ
tPD
min
1/64fs
65
65
30
30
−20
−20
−20
−20
200
80
80
40
40
150
50
50
150
typ
64fs
50
64fs
50
Note 11. BICK rising edge must not occur at the same time as LRCK edge.
Note 12. In case of using INT2. When INT2 is not used, the max value is not limited.
Note 13. The AK4122 can be reset by bringing the PDN pin = “L”.
[AK4122]
max
30
30
20
30
20
30
1000
45
70
Units
ns
ns
ns
ns
ns
ns
ns
Hz
%
ns
ns
Hz
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MS0267-E-03
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2004/08
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet AK4122.PDF ] |
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