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PDF AK4621 Data sheet ( Hoja de datos )
| Número de pieza | AK4621 | |
| Descripción | 24-Bit 192kHz Audio CODEC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK4621]
AK4621
24-Bit 192kHz Stereo Audio CODEC
GENERAL DESCRIPTION
The AK4621 is a high performance 24-bit CODEC that supports up to 192kHz recording and playback.
The on-board analog-to-digital converter has a high dynamic range due to AKM’s Enhanced Dual-Bit
architecture. The DAC utilizes AKM’s Advanced Multi-Bit architecture that achieves low out-of-band noise
and high jitter tolerance through the use of Switched Capacitor Filter (SCF) technology. The AK4621 is
ideal for Pro Audio sound cards, Digital Audio Workstations, DVD-R, hard disk, CD-R recording/playback
systems, and musical instrument recording.
FEATURES
□ 24-bit 2-channel ADC
- Full Differential Inputs
- Selectable Digital Filter
1. ADC Sharp Roll Off Filter (GD=39/fs)
Passband: 0 ~ 21.8kHz (@fs=48kHz)
Stopband Attenuation: 100dB
2. ADC Short Delay Sharp Roll Off Filter (GD=14/fs)
Passband: 0 ~ 21.7kHz (@fs=48kHz)
Stopband Attenuation: 80dB
- S/(N+D): 102dB
- S/N: 115dB
- Digital High-pass Filter for Offset Cancellation
- Overflow Flag
- Audio Interface Format: MSB justified or I2S
□ 24-bit 2-channel DAC
- Selectable Digital Filter
1. DAC Sharp Roll Off Filter (GD=27/fs)
Passband: 0 ~ 21.8kHz (@fs=48kHz)
Stopband Attenuation: 70dB
2. DAC Slow Roll Off Filter (GD=27/fs)
Passband: 0 ~ 8.9kHz (@fs=48kHz)
Stopband Attenuation: 73dB
3. DAC Short Delay Sharp Roll Off Filter (GD=7/fs)
Passband: 0 ~ 21.8kHz (@fs=48kHz)
Stopband Attenuation: 70dB
- Switched-cap Low Pass Filter
- Differential Outputs
- S/(N+D): 100dB
- S/N: 115dB
- De-emphasis for 32kHz, 44.1kHz, 48kHz Sampling
- Output Digital Attenuator: 0dB ~ – 72dB, Linear 256 + 16steps
- Zero Detection Function
- Audio Interface Format: MSB justified, LSB justified, I2S
□ High Jitter Tolerance
□ Sampling Rate: 32kHz ~ 216kHz
□ μP Interface: 3-wire Serial Interface
□ Master Clock: 128fs/192fs/256fs/384fs/512fs/768fs/1024fs
MS1258-E-01
-1-
2011/01
1 page  
[AK4621]
PIN/FUNCTION
No. Pin Name I/O
Function
1 VCOM
O
Common Voltage Output Pin, (AVDD)/2
Bias voltage of ADC inputs and DAC outputs.
2 AINR+
I Rch Positive Input Pin
3 AINR-
I Rch Negative Input Pin
4 AINL+
I Lch Positive Input Pin
5 AINL-
I Lch Negative Input Pin
Voltage Reference Input Pin, AVDD
6 VREF
I Used as a voltage reference by ADC & DAC. VREF is connected externally to filtered
AVDD.
7 VSS1
- Analog Ground Pin
8 AVDD
- Analog Power Supply Pin, 4.75 ∼ 5.25V
Parallel/Serial Mode Select Pin
9 P/S
I “L”: Serial Mode, “H”: Parallel Mode
Do not change this pin during PDN pin = “H”.
10 MCLK
I Master Clock Input Pin
11 LRCK
I Input/Output Channel Clock Pin
12 BICK
I Audio Serial Data Clock Pin
13 SDTO
O Audio Serial Data Output Pin
14 SDTI
I Audio Serial Data Input Pin
15
OVFR
DZFR
O Rch Over Flow Flag Pin (in Parallel mode or when ZOS bit=“0” in Serial Mode)
O Rch Zero Detection Flag Pin (when ZOS bit=“1” in Serial Mode)
16
OVFL
DZFL
O Lch Over Flow Flag Pin (in Parallel mode or when ZOS bit=“0” in Serial Mode)
O Lch Zero Detection Flag Pin (when ZOS bit=“1” in Serial Mode)
17
CDTI
CKS0
I Control Data Input Pin (in Serial Mode)
I Master Clock Select Pin (in Parallel Mode)
18
CCLK
CKS1
I Control Data Clock Pin (in Serial Mode)
I Master Clock Select Pin (in Parallel Mode)
CSN I Chip Select Pin in Serial Mode (in Serial Mode)
19 DIF
I
Digital Audio Interface Select Pin (in Parallel Mode)
“L”: 24bit MSB justified, “H”: I2S compatible
20 DFS0
I Double Speed Sampling Mode Pin
21 PDN
I
Power-Down Mode Pin
“L”: Power down reset and initialize the control register, “H”: Power up
22 DEM0
I De-emphasis Control Pin
Digital Filter Select Pin
23 SDFIL
I “L”: Short Delay Sharp Roll Off Filter (ADC), Short Delay Sharp Roll Off Filter (DAC)
“H”: Sharp Roll Off Filter (ADC), Sharp Roll Off Filter (DAC)
24 TVDD
- Digital I/O Power Supply Pin, DVDD ∼ 5.25V
25 DVDD
- Digital Power Supply Pin, 3.0 ∼ 3.6V
26 VSS2
- Digital Ground Pin
27 AOUTL- O Lch Negative Analog Output Pin
28 AOUTL+ O Lch Positive Analog Output Pin
29 AOUTR- O Rch Negative Analog Output Pin
30 AOUTR+ O Rch Positive Analog Output Pin
Note 1. All digital input pins (P/S, MCLK, LRCK, BICK, SDTI, CDTI/CKS0, CCLK/CKS1, CSN/DIF, DFS0, PDN,
DEM0 and SDFIL) must not be left floating.
MS1258-E-01
-5-
2011/01
5 Page 
[AK4621]
ADC SHORT DELAY SHARP ROLL OFF FILTER CHARACTERISTICS (fs=48kHz)
(Ta=25°C; AVDD=4.75 ∼ 5.25V; DVDD=3.0 ∼ 3.6V, TVDD=DVDD ∼ 5.25V; Normal Speed Mode; SDAD bit = “1”)
Parameter
Symbol
min
typ
max Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 16) −0.01dB
PB
0
- 21.7 kHz
−0.1dB
- 22.1 - kHz
−3.0dB
−6.0dB
- 23.8 - kHz
- 24.4 - kHz
Stopband
(Note 16)
SB
28.2
-
- kHz
Passband Ripple
PR -
-
±0.01
dB
Stopband Attenuation
SA 80
-
- dB
Group Delay
(Note 17)
GD
-
14
- 1/fs
Group Delay Distortion
ΔGD - ±0.01 -
μs
ADC Digital Filter (HPF):
Frequency Response (Note 16) −3dB
FR
-
1.0
-
Hz
−0.1dB
- 6.5 - Hz
ADC SHORT DELAY SHARP ROLL OFF FILTER CHARACTERISTICS (fs=96kHz)
(Ta=25°C; AVDD=4.75 ∼ 5.25V; DVDD=3.0 ∼ 3.6V, TVDD=DVDD ∼ 5.25V; Double Speed Mode; SDAD bit = “1”)
Parameter
Symbol
min
typ
max Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 16) −0.01dB
PB
0
- 43.3 kHz
−0.1dB
- 44.2 - kHz
−3.0dB
−6.0dB
- 47.6 - kHz
- 48.9 - kHz
Stopband
(Note 16)
SB
55.9
-
- kHz
Passband Ripple
PR -
-
±0.01
dB
Stopband Attenuation
SA 80
-
- dB
Group Delay
(Note 17)
GD
-
14
- 1/fs
Group Delay Distortion
ΔGD
- ±0.013 -
μs
ADC Digital Filter (HPF):
Frequency Response (Note 16) −3dB
−0.1dB
FR
- 2.0 -
- 13.0 -
Hz
Hz
ADC SHORT DELAY SHARP ROLL OFF FILTER CHARACTERISTICS (fs=192kHz)
(Ta=25°C; AVDD=4.75 ∼ 5.25V; DVDD=3.0 ∼ 3.6V, TVDD=DVDD ∼ 5.25V; Quad Speed Mode; SDAD bit = “1”)
Parameter
Symbol
min
typ
max Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 16) −0.01dB
−0.1dB
−3.0dB
−6.0dB
Stopband
(Note 16)
Passband Ripple
Stopband Attenuation
Group Delay
(Note 17)
Group Delay Distortion
PB
SB
PR
SA
GD
ΔGD
0
-
-
-
141.1
-
79
-
-
-
81.1
99.9
106.7
-
-
-
11
0
76.1
-
-
-
-
±0.01
-
-
-
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
ADC Digital Filter (HPF):
Frequency Response (Note 16) −3dB
−0.1dB
FR
- 4.0 -
- 26.0 -
Hz
Hz
MS1258-E-01
- 11 -
2011/01
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4621.PDF ] | |
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