AKM AK4317-VF Datasheet

ASAHI KASEI [AK4317]

AK4317

18Bit SCF DAC with ATT & MIXER

General Description

The AK4317 is a 1bit stereo DAC with channel separated volume and channel mixer. This DAC also
includes 18bit dig it al f ilter and analog LPF. A 1bit DAC can achieve monoto n i c it y and low distortion with
no adjustment and is superior to traditional R-2R ladd er based DACs. In the AK4317, the loss of
accuracy from clock jitter is also improved by using SCF techniques for on-chip post filter. Therefore, the
AK4317 is suitab le for the system like STB including PLL circuit.

Features

Sampling Rate Ranging from 8kHz to 50kHz

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On chip Perfect filtering

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•

8 times FIR Interpolator

•

2nd order SCF

•

2nd order CTF

Digital de-emphasis for 32, 44.1, 48kHz sampling

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L/R Separated Volume

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L/R Mixing

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Soft Mute

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Audio I/F format : MSB justified, LSB justified, I2S

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Master Clock: 256fs or 384fs

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High Tolerance to Clock Jitter

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THD+N: -86dB

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DR: 92dB

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Power Supply:4.5 to 5.5V

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Small Package: 24pin VSOP

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AK4311 Compatible

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ASAHI KASEI [AK4317]

Ordering Guide

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AK4317-VF -40∼+85°C 24pin VSOP(0.65mm pitch)
AKD4317 Evaluation B oard

Pin Layout

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Compatibility with AK4311/A

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1. Changed Specs

Parameter AK4311 AK4311A AK4317
Resolution 16bit 16bit 16/18bit
Operating Temperature
Power Supply
Digital I/F level CMOS CMOS TTL
X'tal Oscillator Yes Yes No
DR 92dB 91dB 92dB
Package SSOP SSOP VSOP

-40∼85°C-10
3∼5.5V 3∼5.5V 4.5∼5.5V

C-40

∼70°

∼85°

C

2. Pin Compatibi lity

The following pin functions are changed fr om AK4311/A. But when X'tal oscillating circuit is not used, it
is possible to chan ge A K4311/A to AK4317 without changing the board layout.

Pin No. AK4311/A AK4317

4XTODIF0
6CLKODIF1

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ASAHI KASEI [AK4317]

PIN/FUNCTION

No. Pin Name I/O Function

1 DVDD - Digital Power Supply
2 DVSS - Digital Ground Pin

3 PD I Power-Do wn Mode Pin

When at "L", the AK4317 is in p ower-down mode and is held in reset.

The AK4317 should always be reset upon po wer-up.
4 DIF0 I Digital Input Format Pin (Internal Pull-down pin)
5 MCLK I Master Clock Input Pin
6 DIF1 I Digital Input Format Pin (Internal Pull-down pin)
7 BICK I Audio S erial Data Clock Pin
8 SDATA I Audio Serial Data Input Pin

2's complement MSB-first data is input on t his pin.
9 LRCK I L/R Clock Pin

10 CDATA I Control Data Input Pi n

Must be tied to "H" or "L" if this pin is not used.

11 CCLK I Control Clock Pin

Must be tied to "H" or "L" if this pin is not used.

12 CS I Chip Select Pin

Must be tied to "H" if this pin is not used.

13 TST2 O Test Pin

Must be left floating.

14 SMUTE I Soft Mute Pin

When this pin goes "H", soft mute cycle is initiated.

When returning "L", the output mute releases.

15 DEM I De-emphasis Enable Pin (Internal Pull-dow n pin)
16 CKS I Master Clock Select Pin

MCLK=256fs,"H": MCLK=384fs

17 AOUT1 O Channel 1 analog output pin
18 AOUT0 O Channel 0 analog output pin

19 VCOM I Common Voltage Pin, AVDD/2

Normally connected to AVSS with a 0.1uF ceram ic capacitor in paralle l
with a 10uF electrolytic cap.

20 AVDD - Analog Power Supply Pin
21 AVSS - Analog Ground pin
22 VREF I Voltage Reference Input Pin

The differential Voltage between this pin and AVSS set the analog output

range. Normally connected t o AVSS with a 0.1uF cerami c capacitor .

23 DZF O Zero Input D etect Pin
24 TST1 I T est Pin

Must be left floating or tied to AVSS.

Note: All input pins except pull-down pins should not be lef t floating.

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ASAHI KASEI [AK4317]

ABSOLUTE MAXIMUM RATINGS

(AVSS,DVSS=0V; Note 1 )

Parameter Symbol min max Units

Power Supplies: Analog

Digital
DADD-AVDD

AVDD
DVDD
VDA

-0.3

-0.3

Input Current, Any Pin Except Supplies IIN -

6.0

6.0

-

0.3

±

10

V
V
V

mA
Input Voltage VIND -0.3 A VDD+0.3 V
Ambient Operating Temperature Ta -40 85
Storage Temperature Tstg -65 150

C

°

C

°

Note: 1 . All voltages with respect to g r ound.

WA R NI NG: Operation at or be yond these limits may result in permanent damage to the devi ce.

Normal operation is not guaranteed at these extremes.

RECOMMENDED OPERATING CONDITIONS

(AVSS,DVSS=0V; Note 1 )

Parameter Symbol min typ max Units

Power Supplies: Analog (Note 2 )

Digital

AVDD
DVDD

4.5

4.5

5.0

5.0

5.5

AVDD

Voltage Reference (Note 3 ) VREF 2.5 - AVDD V

Notes: 2. AVDD and DVDD should be powered at the same t ime or AVDD should be powered earlier

than DVDD.

3. Analog output vo lt age scales with the voltage of VREF.
AOUT(typ.@0dB)=2.8Vpp*VREF/5.

* AKM assumes no responsibility for the usage beyond the conditions in t his data sheet.

V
V

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ASAHI KASEI [AK4317]

ANALOG CHARACTERISTICS

(Ta=25°C; AVDD,DVDD=5.0V; VREF=AVDD; fs=44.1kHz; Signal Frequency=1kHz; 18bit Input Data;
Measurement Bandwidth=10Hz∼20kHz; R

10kΩ; unless otherwise specified)

L

≥

Par ameter min typ max Units
Resolution 18 Bits
Dynamic Characteristics (Note 4 )
THD+N (0dB Output) -80 -86 dB
Dynamic Range (-60dB Output, A weight) 88 92 dB
S/N (A weight) 88 92 dB
Interchannel Isolation(1kHz) 80 90 dB
DC Accuracy
Interchannel Gain Mismatch 0.15 0.3 dB
Gain Drift (Note 5 ) 20 -

ppm/°C
DC Accuracy
Output Voltage (Note 6 ) 2.66 2.8 2.94 Vpp

Load Resistance 10

k

Ω

Power Supplies
Power Sup ply Current

Normal Operation (PD="H")
AVDD
DVDD

12

4

18

6

mA

mA
Power- Down-Mode (PD="L")
AVDD+DVDD (Note 7 )

10

50

uA

Power Dissipation (AVDD+D VDD)
Normal Operation
Power-Down-Mode (Note 7 )

80
50

120 mW

uW
Power Supply Rejection (Note 8 ) 50 dB

Notes: 4. Measured by AD725 C(SHIBASOKU). Averaging mode. Refer to the eva board manual.

5. The voltage o n VREF pin is held +5V ext e rnally.

6. Full-scale vo lt age(0dB). Output voltage scales with the voltage of VREF pin.
AOUT(typ.@0dB)=2.8Vpp*VREF/5.

7. Power Dissipation in t he power-do wn mode is applied with no external clocks
(MCLK,BICK,LRCK held "H" or "L").

8. PSR is applied to AVDD,DVDD with 1kHz, 100mVpp . VREF pin is held +5V.

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ASAHI KASEI [AK4317]

FILTER CHARA CTERISTICS

(Ta=25°C; AVDD,DVDD=4.5V∼5.5V; fs=44.1kHz; DE M="0")

Para meter Symbol min typ max Units
Digital Filter
Passband ±0.1dB (Note 9 )

-6.0dB

PB 0

- 22.05

20.0

-

kHz
kHz

Stopband (Note 9 ) SB 24.1 kHz

0.06

Passband Ripple PR

±

dB
Stopband Attenuation SA 43 dB
Group Delay (Note 10 ) G D - 14.7 - 1/fs
Digital Filter + SCF + CTF

0.5

Frequen cy Response 0∼20.0kHz

-

±

-dB

Note: 9. The passband and stopband frequencies scale with fs.

For examp le, P B=0.4535*fs(@±0.1dB), SB=0.546*fs.

10. The calc ulating delay t ime which occurred b y digital filtering. This time is from setting the
16/18bit data of both channels to input register to the output of anal og signal.

DIGITAL CHARACTERISTICS

(Ta=25°C; AVDD,DVDD=4.5∼5.5V)

Parameter Symbol min typ max Units

High-Level Input Voltage
Low-Le vel Input Voltage

High-Level Output Voltage (Iout=-100A)
Low-Le vel Output Voltage (Iout=100A)

VIH
VIL

VOH
VOL

2.2

-

DVDD-0.5

-

-

-

--

Input Leakage Current (Note 11 ) Iin - -

Notes: 11. DIF0,DIF1,DEM,TST1 pins have internal pull-do wn devices, nominally 160kΩ.

-

0.8

0.5
10 uA

±

V
V

V
V

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