ASAHI KASEI
AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
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1
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GENERAL DESCRIPTION
The AK4340 offers the ideal features for consumer systems that require a 2Vrms audio output. Using
AKM's multi bit architecture for its modulator the AK4340 delivers a wide dynamic range while preserving
linearity for improved THD+N performance. The AK4340 integrates the Switched Capacitor Filter (SCF)
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 Set-top-box, DVD-Audio. The
AK4340 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
Switched Capacitor Filter with High Tolerance to Clock Jitter
On chip Buffer with 2Vrms Single-ended output
Digital De-emphasis Filter: 32kHz, 44.1kHz or 48kHz
Soft Mute Function
Digital Attenuator (Linear 256 Step)
Audio interface format: 24Bit MSB justified, 24/20/16 LSB justified or
I
2
S compatible
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 512fs (Double Speed Mode)
128fs or 192fs (Quad Speed Mode)
THD+N: -90dB
Dynamic Range: 106dB
Power supply: +4.5V to +5.5V (DAC), - 4.5V to - 13.2V (Output Buffer)
Ta = - 20 to 85
C
Package: 16pin TSSOP (6.4mm x 5.0mm)
192kHz 24-Bit Stereo
DAC with 2Vrms Output
AK4340
= Preliminary =
LRCK
BICK
SDTI
Audio
Data
Interface
MCLK
PDN
Modulator
AOUTL
8X
Interpolator
SCF
LPF
AOUTR
VDD
VSS
De-emphasis
Control
P/S
P
Interface
Clock
Divider
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
Modulator
8X
Interpolator
HVEE
SCF
LPF
ATT
ATT
GAIN
ASAHI KASEI
AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
-
2
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Ordering Guide
AK4340ET -20
+85C 16pin TSSOP (0.65mm pitch)
AKD4340
Evaluation
board
for
AK4340
Pin Layout
1
MCLK
LRCK
BICK
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
Top
View
2
3
4
5
6
7
8
GAIN
TEST
VSS
VDD
HVEE
AOUTL
AOUTR
P/S
16
15
14
13
12
11
10
9
PDN
SDTI
ASAHI KASEI
AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
-
3
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PIN / FUNCTION
No. Pin
Name
I/O Function
1 MCLK
I
Master Clock Input Pin
An external TTL clock should be input on this pin.
2
BICK
I
Audio Serial Data Clock Pin
3
SDTI
I
Audio Serial Data Input Pin
4 LRCK
I L/R
Clock
Pin
5 PDN
I
Power-Down Mode Pin
When at "L", the AK4340 is in the power-down mode and is held in reset. The
AK4340 must be reset once upon power-up.
SMUTE I
Soft Mute Pin in parallel control mode
"H": Enable, "L": Disable
6
CSN
I
Chip Select Pin in serial control mode
ACKS I
Auto Setting Mode Pin in parallel control mode
"L": Manual Setting Mode, "H": Auto Setting Mode
7
CCLK
I
Control Data Clock Pin in serial control mode
DIF0 I
Audio Data Interface Format Pin in parallel control mode
8
CDTI
I
Control Data Input Pin in serial control mode
9
AOUTR
O
Rch Analog Output Pin
10
AOUTL
O
Lch Analog Output Pin
11 HVEE
-
Output Buffer Negative Power Supply Pin
Normally connected to VSS with a 0.1
F ceramic capacitor in parallel with a
10
F electrolytic cap.
12 VSS
- Ground
Pin
13
VDD
-
DAC Power Supply Pin
14 P/S
I Parallel/Serial Select Pin (Internal pull-up pin)
"L": Serial control mode, "H": Parallel control mode
15 TEST
I
TEST pin
This pin should be connected to VDD.
16 GAIN
I
Output Gain Select Pin
"L": 0dB, "H": +1.94dB
Note: Do not allow digital input pins except pull-up pin to float.
ASAHI KASEI
AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
-
4
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ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 1)
Parameter Symbol
min
max
Units
Power Supply
DAC
Output Buffer
VDD
HVEE
-0.3
TBD
+6.0
TBD
V
V
Input Current (any pins except for supplies)
IIN
-
10
mA
Input Voltage
VIND
-0.3
VDD+0.3
V
Ambient Operating Temperature
Ta
-20
85
C
Storage Temperature
Tstg
-65
150
C
Note 1. All voltages with respect to ground.
WARNING: Operation at or beyond these limits may results in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(VSS=0V; Note 1)
Parameter Symbol
min
typ
max
Units
Power Supply
DAC
Output Buffer
VDD
HVEE
+4.5
-13.2
+5.0
-5.0
+5.5
-4.5
V
V
Note 1. All voltages with respect to ground.
*AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
ASAHI KASEI
AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
-
5
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ANALOG CHARACTERISTICS
(Ta=25
C; VDD=+5.0VV; HVEE=-5.0V; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz; 24bit Input Data;
Measurement frequency=20Hz
20kHz; R
L
5k; unless otherwise specified)
Parameter min
typ
max
Units
Resolution
24
Bits
Dynamic Characteristics (Note 2)
fs=44.1kHz
BW=20kHz
0dBFS
-60dBFS
-90
-39
TBD
-
dB
dB
fs=96kHz
BW=40kHz
0dBFS
-60dBFS
-90
-36
-
-
dB
dB
THD+N
fs=192kHz
BW=40kHz
0dBFS
-60dBFS
-90
-36
-
-
dB
dB
Dynamic Range (-60dBFS with A-weighted) (Note 3)
TBD
106
dB
S/N (A-weighted) (Note 4)
TBD
106
dB
Interchannel Isolation (1kHz)
TBD
100
dB
Interchannel Gain Mismatch
0.2
0.5
dB
DC Accuracy
Gain Drift
100
-
ppm/
C
GAIN pin = "L"
TBD
2
TBD
Vrms
Output Voltage (Note 5)
GAIN pin = "H"
TBD
2.5
TBD
Vrms
Load Capacitance (Note 6)
25
pF
Load Resistance
5
k
Power Supplies
Power Supply Current: (Note 7)
Normal Operation (PDN pin = "H", fs
96kHz)
VDD
HVEE
Normal Operation (PDN pin = "H", fs=192kHz)
VDD
HVEE
Power-Down Mode (PDN pin = "L") (Note 8)
VDD
HVEE
22
8
25
8
10
10
TBD
TBD
TBD
TBD
TBD
TBD
mA
mA
mA
mA
A
A
Note 2. Measured by Audio Precision (System Two). GAIN pin = "L". Refer to the evaluation board manual regarding the
measurement results.
Note 3. 98dB at 16bit data
Note 4. S/N ration does not depend on the input data length
Note 5. Full-scale voltage (0dB). Output voltage is proportional to VDD voltage.
AOUT (typ.@ 0dB, GAIN = 0dB) = 2Vrms VDD/5.
Note 6. When the output pin drives a capacitive load, a resistor should be added in series between output pin and
capacitive load.
Note 7. These values are supplied to VDD pin or HVEE pin.
Note 8. P/S pin is tied to VDD and the other all digital inputs including clock pins (MCLK, BICK and LRCK) are tied to
VDD or VSS.
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