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AK4388 PDF Datasheet - AKM

Part Number AK4388
Description 192kHz 24-Bit 2ch DAC
Manufacturers AKM 
Logo AKM Logo 
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AK4388 datasheet, circuit
ASAHI KASEI
[AK4388]
AK4388
192kHz 24-Bit 2ch ∆Σ DAC
GENERAL DESCRIPTION
The AK4388 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit
architecture for its modulator, the AK4388 delivers a wide dynamic range while preserving linearity for
improved THD+N performance. The AK4388 integrates a combination of SCF and CTF filters increasing
performance for systems with excessive clock jitter. The 24 Bit word length and 192kHz sampling rate
make this part ideal for a wide range of applications including DVD-Audio. The AK4388 is offered in a
space saving 16pin TSSOP package.
FEATURES
† Sampling Rate Ranging from 8kHz to 192kHz
† 128 times Oversampling (Normal Speed Mode)
† 64 times Oversampling (Double Speed Mode)
† 32 times Oversampling (Quad Speed Mode)
† 24-Bit 8 times FIR Digital Filter
† SCF with High Tolerance to Clock Jitter
† Single Ended Output Buffer
† Digital de-emphasis
† Soft mute
† I/F format: 24-Bit MSB justified, 24/16-Bit LSB justified or I2S
† Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
† THD+N: -90dB
† Dynamic Range: 106dB
† Power supply: 4.5 to 5.5V
† Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
† AK4384 Parallel Mode Compatible
MCLK
DEM
SMUTE
ACKS
DIF0
DIF1
LRCK
BICK
SDTI
Control
Port
De-emphasis
Control
Clock
Divider
Audio
Data
Interface
8X
Interpolator
8X
Interpolator
∆Σ
Modulator
∆Σ
Modulator
SCF
LPF
SCF
LPF
RSTN
MS0485-E-02
-1-
VDD
VSS
VCOM
DZF
AOUTL
AOUTR
2006/08
Free Datasheet http://www.datasheet4u.net/

1 page
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AK4388 pdf, schematic
ASAHI KASEI
„ Ordering Guide
AK4388ET
AK4388VT
AKD4388
„ Pin Layout
-20 +85°C
16pin TSSOP (0.65mm pitch)
-40 +85°C
16pin TSSOP (0.65mm pitch)
Evaluation Board for AK4388
MCLK
BICK
SDTI
LRCK
RSTN
SMUTE
ACKS
DIF0
1
2
3
4
5
6
7
8
Top
View
16 DZF
15 DEM
14 VDD
13 VSS
12 VCOM
11 AOUTL
10 AOUTR
9 DIF1
[AK4388]
„ Compatibility with AK4384
1. Function
Functions
THD+N
Output Voltage
Slow Roll-Off Filter
Mode Setting
DEM in Parallel control
Audio Format in Parallel control
Zero Data Detect Pin
AK4384
-94dB
3.4Vpp
Available
Serial/Parallel
Not Available
24-Bit I2S
24-Bit MSB justified
2 pins
AK4388
-90dB
3.2Vpp
Not Available
Parallel
Available
24/16-Bit I2S
24-Bit MSB justified
24/16-Bit LSB justified
1 pin
2. Pin Configuration
AK4388
AK4384
MCLK
MCLK
BICK
BICK
SDTI
SDTI
LRCK
LRCK
RSTN
PDN
SMUTE
SMUTE/CSN
ACKS
ACKS/CCLK
DIF0
DIF0/CDTI
Pin# Pin# AK4384
AK4388
1 16 DZFL
DZF
2 15 DZFR
DEM (pd)
3 14 VDD
VDD
4 13 VSS
VSS
5 12 VCOM
VCOM
6 11 AOUTL
AOUTL
7 10 AOUTR
AOUTR
8 9 P/S (pu)
DIF1 (pu)
Different points from AK4384
* pu: Pull-up, pd: Pull-down
MS0485-E-02
-2-
2006/08
Free Datasheet http://www.datasheet4u.net/

2 Page
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AK4388 equivalent
ASAHI KASEI
[AK4388]
FILTER CHARACTERISTICS
(Ta = 25°C; VDD = 4.5 5.5V; fs = 44.1kHz)
Parameter
Symbol
min
typ
max Units
Digital filter (DEM = OFF)
Passband
±0.05dB (Note 9)
PB 0
20.0 kHz
–6.0dB
- 22.05 - kHz
Stopband
(Note 9)
SB 24.1
kHz
Passband Ripple
PR
± 0.02
dB
Stopband Attenuation
SA 54
dB
Group Delay
(Note 10)
GD - 19.3 - 1/fs
De-emphasis Filter (DEM = ON)
De-emphasis Error fs = 32kHz
-
-
–1.5/0
dB
(Relative to 0Hz)
fs = 44.1kHz
-
-
–0.2/+0.2
dB
fs = 48kHz
-
-
0/+0.6
dB
Digital Filter + LPF (DEM = OFF)
Frequency Response 20.0kHz fs=44.1kHz
40.0kHz fs=96kHz
80.0kHz fs=192kHz
FR
FR
FR
- ±0.2 -
- ±0.3 -
- +0.1/-0.6 -
dB
dB
dB
Notes: 9. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs.
10. The calculating delay time which occurred by digital filtering. This time is from setting the 16/24bit data
of both channels to input register to the output of analog signal.
MS0485-E-02
-5-
2006/08
Free Datasheet http://www.datasheet4u.net/

5 Page
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AK4388 diode, scr
ASAHI KASEI
[AK4388]
„ Audio Serial Interface Format
Data is shifted in via the SDTI pin using BICK and LRCK inputs. The DIF0-1 as shown in Table 5 can select four serial
data modes. DIF1 pin is internal pull-up pin. In all modes the serial data is MSB-first, 2’s compliment format and is
latched on the rising edge of BICK.
Mode
0
1
2
3
DIF1
L
L
H
H
DIF0
L
H
L
H
SDTI Format
16bit LSB justified
24bit LSB justified
24bit MSB justified
16/24bit I2S Compatible
BICK
32fs
48fs
48fs
48fs or 32fs
Table 5. Audio Data Formats
Figure
Figure 1
Figure 2
Figure 3
Figure 4
LRCK
BICK
(32fs)
SDTI
Mode 0
BICK
(64fs)
SDTI
Mode 0
01
10 11 12 13 14 15 0 1
15 14
01
6 5 4 3 2 1 0 15 14
14 15 16 17
31 0 1
Don’t care
15 14
15:MSB, 0:LSB
Lch Data
0 Don’t care
10 11 12 13 14 15 0 1
6 5 4 3 2 1 0 15 14
14 15 16 17
31 0 1
15 14
Rch Data
0
Figure 1. Mode 0 Timing
LRCK
BICK
(64fs)
SDTI
Mode 1
01
8 9 10 11 12
Don’t care 23 22 21 20 19
23:MSB, 0:LSB
Lch Data
31 0 1
8 9 10 11 12
0 Don’t care 23 22 21 20 19
Rch Data
31 0 1
0
Figure 2. Mode 1 Timing
MS0485-E-02
-9-
2006/08
Free Datasheet http://www.datasheet4u.net/

9 Page





Information Total 18 Pages
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