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AKM

AK4388 Datasheet

192kHz 24-Bit 2ch DAC


AK4388 Datasheet Preview


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/
Page 1

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/
Page 2

ASAHI KASEI
[AK4388]
PIN/FUNCTION
No. Pin Name
I/O Function
1 MCLK
2 BICK
3 SDTI
4 LRCK
5 RSTN
6 SMUTE
I Master Clock Input Pin
An external TTL clock should be input on this pin.
I Audio Serial Data Clock Pin
I Audio Serial Data Input Pin
I L/R Clock Pin
I Reset Mode Pin
When at “L”, the AK4388 is in the power-down mode and is held in reset.
The AK4388 must be reset once upon power-up.
I Soft Mute Pin
“H”: Enable, “L”: Disable
7 ACKS
8 DIF0
I Auto Setting Mode Pin
“L”: Manual Setting Mode, “H”: Auto Setting Mode
I Audio Data Interface Format Pin
9 DIF1
10 AOUTR
11 AOUTL
I Audio Data Interface Format Pin (Internal pull-up pin)
O Rch Analog Output Pin
O Lch Analog Output Pin
12 VCOM
13 VSS
14 VDD
O Common Voltage Pin, VDD/2
Normally connected to VSS with a 10µF electrolytic cap.
- Ground Pin
- Power Supply Pin
15 DEM
16 DZF
I De-emphasis Mode Pin (Internal pull-down pin)
When at “H”, the de-emphasis filter is available.
O Zero Input Detect Pin
Note: All input pins except pull-up and pull-down pins should not be left floating.
ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 1)
Parameter
Symbol
min
Power Supply
VDD
-0.3
Input Current (any pins except for supplies)
IIN
-
Input Voltage
VIND
-0.3
Ambient Operating Temperature AK4388ET
Ta
-20
AK4388VT
Ta
-40
Storage Temperature
Tstg -65
Note: 1. All voltages with respect to ground.
max
6.0
±10
VDD+0.3
85
85
150
WARNING: Operation at or beyond these limits may results in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
(VSS=0V; Note 1)
Parameter
Power Supply
RECOMMENDED OPERATING CONDITIONS
Symbol
VDD
min typ
4.5 5.0
max
5.5
*AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
Units
V
mA
V
°C
°C
°C
Units
V
MS0485-E-02
-3-
2006/08
Free Datasheet http://www.datasheet4u.net/
Page 3

ASAHI KASEI
[AK4388]
ANALOG CHARACTERISTICS
(Ta=25°C; VDD=5.0V; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz; 24bit Input Data;
Measurement frequency=20Hz 20kHz; RL 5k; unless otherwise specified)
Parameter
min
typ
max Units
Resolution
24 Bits
Dynamic Characteristics
(Note 3)
THD+N
fs=44.1kHz
0dBFS
–90 –80 dB
BW=20kHz
–60dBFS
–42 - dB
fs=96kHz
0dBFS
–90 - dB
BW=40kHz
–60dBFS
–39 - dB
fs=192kHz
0dBFS
–85 - dB
BW=40kHz
–60dBFS
–39 - dB
Dynamic Range (-60dBFS with A-weighted)
(Note 4)
98
106
dB
S/N (A-weighted)
(Note 5)
98
106
dB
Interchannel Isolation (1kHz)
90 100
dB
Interchannel Gain Mismatch
0.2 0.5 dB
DC Accuracy
Gain Drift
100 - ppm/°C
Output Voltage
(Note 6)
2.95
3.20
3.45 Vpp
Load Resistance
(Note 7)
5
k
Load Capacitance
25 pF
Power Supplies
Power Supply Current (VDD)
Normal Operation (RSTN pin = “H”, fs 96kHz)
Normal Operation (RSTN pin = “H”, fs = 192kHz)
Power-Down Mode (RSTN pin = “L”)
(Note 8)
16 - mA
18 27 mA
60 160 µA
Notes: 3. Measured by Audio Precision (System Two). Refer to the evaluation board manual.
4. 100dB at 16bit data.
5. S/N does not depend on input bit length.
6. Full-scale voltage (0dB). Output voltage scales with the voltage of VDD,
AOUT (typ.@0dB) = 3.20Vpp × VDD/5.
7. For AC-load.
8. DIF1 pin is tied to VDD and the other all digital inputs including clock pins (MCLK, BICK and LRCK) are
tied to VSS.
MS0485-E-02
-4-
2006/08
Free Datasheet http://www.datasheet4u.net/
Page 4
Part Number AK4388
Manufactur AKM
Description 192kHz 24-Bit 2ch DAC
Total Page 18 Pages
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