AK4121 Datasheet PDF - Asahi Kasei Microsystems

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AK4121
Asahi Kasei Microsystems

Part Number AK4121
Description ASYNCHRONOUS SAMPLE RATE CONVERTER
Page 19 Pages


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ASAHI KASEI
[AK4121]
www.DataSheet4U.com
AK4121
Asynchronous Sample Rate Converter
GENERAL DESCRIPTION
AK4121 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. Using the AK4121 simplifies
system design, since the AK4121’s internal PLL eliminates the need for a master clock in slave mode.
Then the AK4121 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
MS0191-E-03
-1-
2004/08



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ASAHI KASEI
„ Ordering Guide
AK4121VF
AKD4121
„ Pin Layout
40 +85°C
24pin VSOP (0.65mm pitch)
Evaluation Board for AK4121
[AK4121]
www.DataSheet4U.com
FILT
AVSS
PDN
SMUTE
DEM0
DEM1
ILRCK
IBICK
SDTI
IDIF0
IDIF1
IDIF2
1
2
3
4
5
6
7
8
9
10
11
12
Top
View
24 VDD
23 DVSS
22 TVDD
21 MCLK
20 OLRCK
19 OBICK
18 SDTO
17 ODIF1
16 ODIF0
15 CMODE2
14 CMODE1
13 CMODE0
„ Major Difference between AK4120 and AK4121
Items
MCLK Input
Input sample rate (max)
Vdd
Input 5V Tolerant
De-emphasis Filter
Soft Mute
Digital Volume
Digital Mixer
AK4120
Needed (supports 256/512fs)
48kHz
2.7V ~ 3.6V
X
X
X
O
O
AK4121
NOT Needed (Slave mode) /
Needed (Master Mode:
supports 256/384/512/768fs)
96kHz
3.0V ~ 3.6V
O
O
O
X
X
MS0191-E-03
-2-
2004/08



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ASAHI KASEI
No. Pin Name
1 FILT
2 AVSS
3 PDN
4 SMUTE
5 DEM0
6 DEM1
7 ILRCK
8 IBICK
9 SDTI
10 IDIF0
11 IDIF1
12 IDIF2
13 CMODE0
14 CMODE1
15 CMODE2
16 ODIF0
17 ODIF1
18 SDTO
19 OBICK
20 OLRCK
21 MCLK
22 TVDD
23 DVSS
24 VDD
PIN/FUNCTION
I/O Function
O Loop-Filter Pin for PLL
I Analog Ground Pin
I
Power-Down pin
When “L”, the AK4121 is powered-down and reset.
I Soft Mute Pin
I De-emphasis Filter Control Pin #0
I De-emphasis Filter Control Pin #1
I L/R Clock Pin for Input
I Audio Serial Data Clock Pin for Input
I Audio Serial Data Input Pin
I Input Data Format pin #0
I Input Data Format pin #1
I Input Data Format pin #2
I Clock Mode Select Pin #0
I Clock Mode Select Pin #1
I Clock Mode Select Pin #2
I Output Data Format pin #0
I Output Data Format pin #1
O Audio Serial Data Output Pin
I/O Audio Serial Data Clock Pin for Output
I/O L/R Clock Pin for Output
I Master Clock Pin for Output
I Input Buffer Power Supply Pin, 3.3V or 5V
I Digital Ground Pin
I Power Supply Pin, 3.3V
[AK4121]
www.DataSheet4U.com
MS0191-E-03
-3-
2004/08



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ASAHI KASEI
[AK4121]
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
(AVSS=DVSS=0V; Note 1)
Parameter
Symbol
min
Power Supplies:
Core
VDD
0.3
Input Buffer
TVDD
0.3
|AVSS-DVSS| (Note 1)
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
- 114 -
FSO/FSI=48kHz/44.1kHz
- 114 -
FSO/FSI=32kHz/48kHz
FSO/FSI=96kHz/32kHz
- 114 -
- 115 -
Worst Case (FSO/FSI=32kHz/44.1kHz)
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.
MS0191-E-03
-4-
2004/08



AK4121 datasheet pdf
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