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PDF AK4497 Data sheet ( Hoja de datos )
| Número de pieza | AK4497 | |
| Descripción | Quality Oriented 32-Bit 2ch DAC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK4497]
= Preliminary =
AK4497
Quality Oriented 32-Bit 2ch DAC
1. General Description
The AK4497 is a new generation Premium 32-bit 2ch DAC with VELVET SOUNDTM technology,
achieving industry’s leading level low distortion characteristics and wide dynamic range. The AK4497
integrates a newly developed switched capacitor filter “OSR Doubler”, making it capable of supporting
wide range signals and achieving low out-of-band noise while realizing low power consumption.
Moreover, the AK4497 has six types of 32-bit digital filters, realizing simple and flexible sound tuning in
wide range of applications. The AK4497 accepts up to 768kHz PCM data and 22.4MHz DSD data, ideal
for a high-resolution audio source playback that are becoming widespread in network audios,
USB-DACs and Car Audio Systems.
Application: AV Receivers, CD/SACD player, Network Audios, USB DACs, USB Headphones, Sound
Plates/Bars, Measurement Equipment, Control Systems, Public Audios (PA), IC-Recorders,
Bluetooth Headphones, HD Audio/Voice Conference Systems
2. Features
THD+N: -115dB
DR, S/N: 127dB (Mono Mode, 130dB)
256 Times Over Sampling
Sampling Rate: 8kHz 768kHz
32-bit 8x Digital Filter
- Short Delay Sharp Roll-off, GD=6.0/fs,
Ripple: 0.005dB, Attenuation: 100dB
- Short Delay Slow Roll-off, GD=5.0/fs
- Sharp Roll-off
- Slow Roll-off
- Low-dispersion Short Delay Filter
- Super Slow Roll-off
2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz DSD Input Support
- Filter1 (fc=39kHz, 2.8MHz mode), Filter2 (fc=76kHz, 2.8MHz mode)
Digital De-emphasis for 32, 44.1, 48kHz sampling
Soft Mute
Digital Attenuator (255 levels and 0.5dB step)
Mono Mode
External Digital Filter Interface
Audio I/F Format: 24/32 bit MSB justified, 16/20/24/32 bit LSB justified, I2S, DSD
Master Clock
8kHz ~ 32kHz: 1152fs
8kHz ~ 54kHz: 512fs or 768fs
8kHz ~ 108kHz: 256fs or 384fs
108kHz ~ 216kHz: 128fs or 192fs
~ 384kHz: 64fs or 128fs
~ 768kHz: 64fs
Power Supply:
TVDD=AVDD= 3.3 3.6V (by Internal LDO),
TVDD=AVDD= 1.7 3.6V, DVDD=1.7 1.98V (by external supply),
VDDL/R= 4.75 5.25V
Digital Input Level: CMOS
Package: 64-pin TQFP
Rev. 0.1
2015/11
-1-
1 page  
■ Pin Configurations
5. Pin Configurations and Functions
[AK4497]
Rev. 0.1
2015/11
-5-
5 Page 
[AK4497]
(Ta=25C; AVDD=TVDD=3.3V, DVDD=1.8V(@LDOE= “L”), AVSS=DVSS=VSSL/R=0V;
VREFHL/R=VDDL/R=5.0V, VREFLL/R= 0V; Input data = 24bit; BICK=64fs; Signal Frequency = 1kHz;
Sampling Frequency = 44.1kHz; Internal OPAMP GBW=30MHz (SC[1:0] bit=”00”); 2Vrms output mode
(GC[2:0] bit= “000” or GAIN= “L”); Heavy load drive mode=off(HLOAD bit= “0” or HLOAD= “L”); unless
otherwise specified.)
Power Supplies
Parameter
Min.
Typ.
Max.
Unit
Power Supply Current
Normal operation (PDN pin = “H”)
VDDL/R(total)
64 mA
VREFHL/R
1 mA
AVDD
-1
mA
TVDD
LDOE= “H”
fs= 44.1kHz
fs= 96kHz
-
8
13
mA
mA
LDOE= “L”
fs = 192kHz
-
20
1
mA
mA
DVDD
LDOE= “L”
fs= 44.1kHz
fs= 96kHz
8
13
mA
mA
fs = 192kHz
Total Idd per channel (HLOAD= “H”)
・fs=44.1kHz
Power down (PDN pin = “L”)
(Note 15)
TVDD+AVDD+VDDL/R+DVDD
-
20
45
10
mA
mA/ch
A
Note 15. In the power down mode. The PSN, DEM0 pin = DVDD, and all other digital input pins including
clock pins (MCLK, BICK and LRCK) are held to DVSS.
Note 16. The DVDD pin becomes an output pin when the LDOE pin = “H”.
■ DSD mode
(Ta=25C; LDOE=L, AVDD=TVDD=3.3V, DVDD=1.8V; AVSS=DVSS=VSSL/R=0V;
VREFHL/R=VDDL/R=5.0V, VREFLL/R= 0V; Signal Frequency = 1kHz; Measurement bandwidth = 20Hz
~ 20kHz; External Circuit; unless otherwise specified.)
Parameter
Min.
Typ.
Max. Unit
Resolution
- - 32 Bits
Dynamic Characteristics
THD+N
DSD dataStream: 2.8224MHz 0dBFS
-
-115
- dB
(Note 17)
DSD dataStream: 5.6448MHz 0dBFS
-
-115
- dB
DSD dataStream: 11.2896MHz 0dBFS
-
-115
- dB
S/N
(A-weighted,
Normal path)
(Note 17)
DSD dataStream: 2.8224MHz
DSD dataStream: 5.6448MHz
DSD dataStream: 11.2896MHz
Digital“0”
Digital“0”
Digital“0”
-
-
-
127 - dB
127 - dB
127 - dB
DC Accuracy
Output Voltage (Normal path)
(Note 13)
2.65
2.8 2.95 Vpp
Output Voltage (Volume Bypass)
(Note 13)
2.6
2.5 2.63 Vpp
Note 17. Analog characteristics are not guaranteed when the DSD dataStream is 22.5782MHz.
Rev. 0.1
- 11 -
2015/11
11 Page | ||
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| PDF Descargar | [ Datasheet AK4497.PDF ] | |
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