AK4351VT AKM Semiconductor, Inc., AK4351VT Datasheet

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AK4351VT

Manufacturer Part Number
AK4351VT
Description
Manufacturer
AKM Semiconductor, Inc.
Datasheet

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Manufacturer
Quantity
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Part Number:
AK4351VT-E2
Manufacturer:
ASAHIKASE
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Part Number:
AK4351VT-E2
Manufacturer:
AKM
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ASAHI KASEI
The AK4351 is a high cost performance 18bit stereo DAC for low-end digital audio systems. The
modulator in the AK4351 uses the new developed Advanced Multi Bit architecture with wide dynamic
range. The analog outputs are filtered in the analog domain by a combination of SCF and CTF.
Therefore, any external filters are not required. The SCF techniques also improve the loss of accuracy
from clock jitter. Therefore, the AK4351 is suitable for the system like STB including PLL circuit. The
AK4351 is available in very small 16pin TSSOP package, which reduces system space.
M0022-E-04
SDATA
LRCK
BICK
· Sampling Rate Ranging from 8kHz to 50kHz
· 128 times Oversampling
· Perfect filtering
· On chip Buffer with Single End Output
· Digital de-emphasis for 44.1kHz sampling
· I/F format: MSB justified, 16/18bit LSB justified or I
· Master clock: 256fs or 384fs
· TTL Level Digital Interface
· THD+N: -88dB
· D-Range: 96dB
· High Tolerance to Clock Jitter
· Power supply: 4.5 to 5.5V
· Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
Serial Input
DIF0
PD
Interface
18bit 8 times FIR Interpolator with 57dB attenuation
2nd order LPF
Total Response:
DIF1
GENERAL DESCRIPTION
18Bit Advanced Multi Bit DS 2ch DAC
De-emphasis
Control
DEM
8X
Interpolator
8X
Interpolator
FEATURES
±
0.2dB at 20kHz
- 1 -
Clock Divider
MCLK
DS
Modulator
DS
Modulator
CKS
TST
2
LPF
S
LPF
VREF
AK4351
VDD
VSS
VCOM
AOUTR
AOUTL
[AK4351]
1999/12

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AK4351VT Summary of contents

Page 1

ASAHI KASEI The AK4351 is a high cost performance 18bit stereo DAC for low-end digital audio systems. The modulator in the AK4351 uses the new developed Advanced Multi Bit architecture with wide dynamic range. The analog outputs are filtered in ...

Page 2

... ASAHI KASEI n Ordering Guide AK4351VT AKD4351 n Pin Layout DIF1 1 LRCK 2 BICK 3 SDATA MCLK 6 DEM 7 CKS 8 No. Pin Name I/O 1 DIF1 I 2 LRCK I 3 BICK I 4 SDATA MCLK I 7 DEM I 8 CKS I 9 TST O 10 AOUTR O 11 AOUTL O 12 VCOM ...

Page 3

ASAHI KASEI (VSS=0V; Note 1) Parameter Power Supply Input Current, Any Pin Except Supplies Input Voltage Ambient Operating Temperature Storage Temperature Note:1. All voltages with respect to ground. WARNING: Operation at or beyond these limits may result in permanent damage ...

Page 4

ASAHI KASEI (Ta=25°C; VDD=5.0V; fs=44.1kHz; BICK=64fs; Signal Frequency=1kHz; 18bit Input Data; Measurement frequency=10Hz ~ 20kHz; R Parameter Resolution Dynamic Characteristics THD+N (0dB Output) Dynamic Range (-60dB Output, A-weight) S/N (A-weight) Interchannel Isolation (1kHz) Interchannel Gain Mismatch DC Accuracy Gain Drift ...

Page 5

ASAHI KASEI (Ta=25°C; VDD=4.5 ~ 5.5V; fs=44.1kHz; DEM=”L”) Parameter Digital filter ±0.05dB (Note 7) Passband -6.0dB Stopband (Note 7) Passband Ripple Stopband Attenuation Group Delay (Note 8) Digital Filter + LPF Frequency Response 0 ~ 20.0kHz Note: 7. The passband ...

Page 6

ASAHI KASEI (Ta=25°C; VDD=4.5 ~ 5.5V Parameter Master Clock Timing 256fs: Pulse Width Low Pulse Width High 384fs: Pulse Width Low Pulse Width High LRCK Frequency Duty Cycle Serial Interface Timing BICK Period BICK Pulse Width Low Pulse ...

Page 7

ASAHI KASEI n Timing Diagram MCLK LRCK BICK LRCK tBLR BICK SDATA PD M0022-E-04 1/fCLK tCLKH tCLKL 1/fs tBCK tBCKH tBCKL Clock Timing tLRB tSDS tSDH Serial Interface Timing tPD Power-down - 7 - [AK4351] VIH VIL VIH VIL VIH ...

Page 8

ASAHI KASEI n System Clock The external clocks, which are required to operate the AK4351, are MCLK, LRCK and BICK. The master clock (MCLK) should be synchronized with LRCK but the phase is not critical. The MCLK is used to ...

Page 9

ASAHI KASEI Lch LRCK ...

Page 10

ASAHI KASEI n Power-down The AK4351 is placed in the power-down mode by bringing PD pin “L” and the anlog outputs are floating(Hi-Z). Figure 4 shows an example of the system timing at the power-down and power-up. PD Internal Normal ...

Page 11

ASAHI KASEI Figure 5 shows the system connection diagram. An evaluation board [AKD4351] is available in order to allow an easy study on the layout of a surrounding circuit Decoder 3 4 Reset 5 External 6 Clock 7 ...

Page 12

ASAHI KASEI 1. Grounding and Power Supply Decoupling VDD and VSS are supplied from analog supply and should be separated from system digital supply. Decoupling capacitor, especially 0.1mF ceramic capacitor for high frequency should be placed as near to VDD ...

Page 13

ASAHI KASEI 16pin TSSOP (Unit: mm) *5 ± 0.22 0.1 Seating Plane NOTE: Dimension "*" does not include mold flash. n Package & Lead frame material Package molding compound: Lead frame material: Lead frame surface treatment: M0022-E-04 PACKAGE ...

Page 14

ASAHI KASEI · These products and their specifications are subject to change without notice. Before considering any use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized distributor concerning their current status. · AKM assumes ...

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