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PDF AK4558 Data sheet ( Hoja de datos )
| Número de pieza | AK4558 | |
| Descripción | 108dB 216kHz 32Bit CODEC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK4558]
AK4558
108dB 216kHz 32Bit CODEC with PLL
1. General Description
The AK4558 is a low voltage 32bit 216kHz CODEC for high performance battery powered digital audio
subsystems. An internal circuit includes newly developed 32-bit Digital Filter achieving short group delay
and high quality sound. In addition, “OSR-Doubler” technology is newly adopted, making the AK4558
capable of supporting wide range signals and achieving low out-of-band noise while realizing low power
consumption. The AK4558 is ideal for a wide range of applications that demands high sound quality
including Electronic musical instruments and Audio Interfaces. The analog inputs and outputs are
single-ended to minimize pin count and external filtering requirements. The AK4558 is housed in a very
small 28-pin QFN. It is ideal for space-sensitive applications.
2. Features
Single-ended ADC
- Dynamic Range, S/N: 108dB@AVDD=3.3V
- S/(N+D):
92dB@AVDD=3.3V
- Selectable HPF for DC-offset cancel (fc = 1Hz @ fs=48kHz)
- 4-types Digital Filter for High Sound Quality
Single-ended DAC
- Dynamic Range, S/N: 108dB@AVDD=3.3V
- S/(N+D):
100dB@AVDD=3.3V
- Digital de-emphasis for 32kHz, 44.1kHz and 48kHz sampling
- 5-types Digital Filter for High Sound Quality
- Channel Independent Digital Attenuator (256 levels, 0.5dB steps)
Audio I/F format: MSB First, 2’s Complement
- ADC: 24/32bit MSB justified , 24/32bit I2S compatible or TDM
- DAC: 24/32bit MSB justified, 16/20/24/32bit LSB justified,
24/32bit I2S compatible or TDM
Input/Output Voltage: ADC = 2.64Vpp @ AVDD=3.3V
DAC = 2.51Vpp @ AVDD=3.3V
Master/Slave mode
P I/F: I2C Bus
Sampling Rate:
(1) PLL Mode
• PLL Slave Mode (LRCK pin): fs = 8kHz 216kHz
• PLL Slave Mode (BICK pin): fs = 8kHz 216kHz
• PLL Master Mode: 8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz,
48kHz, 54kHz, 88.2kHz, 96kHz, 128kHz, 176.4kHz, 192kHz
(2) External Clock Mode
• Normal Speed: 8kHz to 54kHz
(256fs or 512fs)
8kHz to 48kHz
(384fs or 768fs)
• Double Speed: 54kHz to 108kHz (256fs)
48kHz to 96kHz (384fs)
• Quad Speed: 108kHz to 216kHz (128fs)
96kHz to 192kHz
(192fs)
015004500-E-02
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1 page  
[AK4558]
4. Block Diagram and Functions
■ Block Diagram
PDN
MCKI
PMPLL
PLL
PMADL
LIN
ADC
HPF
RIN
LOUT
ROUT
VCOM
LDOE
ADC
PMDAL
LPF
HPF
PMADR
SCF
DAC
LPF
PMDAR
SCF
LDO:1.8V
DAC
DATT
DEM
DATT
DEM
Audio I/F
uP I/F(I2C)
VCOC
LRCK
BICK
SDTO
SDTI
CKS3
CKS2
CKS1
CKS0/TDMI
LOPS
PMADL/SCL
PMADR/SDA
PS
AVDD VSS1
TVDD
VSS2 VDD18
PMDAL/CAD0 PMDAR/CAD1
Figure 1. Block Diagram
015004500-E-02
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[AK4558]
8. Analog Characteristics
(Ta=25C; AVDD= TVDD=3.3V; VSS1=VSS2=0V; EXT Slave Mode; fs=48kHz, 96kHz, 192kHz; Signal
Frequency=1kHz; BICK=64fs; Data=32bit, Measurement frequency=20Hz 20kHz at fs=48kHz, 20Hz
40kHz at fs=96kHz, 20Hz 40kHz at fs=192kHz; unless otherwise specified)
Parameter
Min.
Typ.
Max.
Unit
ADC Analog Input Characteristics:
Resolution
- - 32 bit
Input Voltage
(Note 7)
S/(N+D)
fs=48kHz
1dBFS
BW=20kHz 60dBFS
fs=96kHz
1dBFS
BW=40kHz 60dBFS
fs=192kHz 1dBFS
BW=40kHz 60dBFS
DR (60dBFS with A-weighted)
S/N (A-weighted)
Input Resistance
2.38
82
-
81
-
-
-
100
100
7
2.64
92
43
91
40
91
40
108
108
10
2.90 Vpp
- dB
- dB
- dB
- dB
- dB
- dB
- dB
- dB
- k
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
90 110
- dB
- 0 0.5 dB
- 100 - ppm/C
Power Supply Rejection
(Note 11)
-
50
- dB
DAC Analog Output Characteristics:
Resolution
- - 32 bit
Output Voltage
(Note 8) 2.26 2.51 2.76 Vpp
S/(N+D)
fs=48kHz
0dBFS
90 100
BW=20kHz 60dBFS
-
45
fs=96kHz
0dBFS
88 98
BW=40kHz 60dBFS
-
42
- dB
- dB
- dB
- dB
fs=192kHz 0dBFS
BW=40kHz 60dBFS
DR (60dBFS with A-weighted)
S/N (A-weighted)
Load Capacitance
(Note 9)
Load Resistance
(Note 10)
-
-
100
100
-
5
98
42
108
108
-
-
- dB
- dB
- dB
- dB
30 pF
- k
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
90 107
- dB
- 0 0.5 dB
- 100 - ppm/C
Power Supply Rejection
(Note 11)
-
50
- dB
Note 7. This value is the full scale (0dB) of the input voltage. Input voltage is proportional to AVDD
voltage. Vin = 0.8 x AVDD (Vpp).
Note 8. This value is the full scale (0dB) of the output voltage. Output voltage is proportional to AVDD
voltage. Vout = 0.76 x AVDD (Vpp).
Note 9. When LOUT/ROUT drives some capacitive load, a 220 resistor should be added in series
between LOUT/ROUT and capacitive load. In this case, LOUT/ROUT pins can drive a capacitor
of 400pF.
Note 10. For AC-load
Note 11. VCOM pin is connected to VSS1 pin with 1µF±50% capacitor in series.
When LDOE pin = “L”, PSR is applied to AVDD, VDD18 and TVDD with 1kHz, 50mVpp.
When LDOE pin = “H”, PSR is applied to AVDD and TVDD with 1kHz, 50mVpp.
015004500-E-02
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2015/09
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4558.PDF ] | |
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