AK4340ET AKM [Asahi Kasei Microsystems], AK4340ET Datasheet

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AK4340ET

Manufacturer Part Number
AK4340ET
Description
192kHz 24-Bit Stereo DAC with 2Vrms Output
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet

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ASAHI KASEI
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.
Rev.0.6
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
LRCK
SDTI
BICK
192kHz 24-Bit Stereo ∆Σ DAC with 2Vrms Output
Interface
P/S
Interface
Audio
Sampling Rate Ranging from 8kHz to 192kHz
Package: 16pin TSSOP (6.4mm x 5.0mm)
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
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal 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
Data
µP
PDN
GENERAL DESCRIPTION
ATT
ATT
AKM CONFIDENTIAL
= Preliminary =
128fs, 192fs, 256fs or 512fs (Double Speed Mode)
128fs or 192fs (Quad Speed Mode)
FEATURES
De-emphasis
Interpolator
Interpolator
Control
- 1 -
I
2
8X
8X
S compatible
Modulator
Modulator
MCLK
Divider
Clock
∆Σ
∆Σ
SCF
SCF
LPF
LPF
GAIN
AK4340
VDD
VSS
HVEE
AOUTR
AOUTL
[AK4340]
2005/11

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AK4340ET Summary of contents

Page 1

ASAHI KASEI 192kHz 24-Bit Stereo ∆Σ DAC with 2Vrms Output 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 ...

Page 2

... ASAHI KASEI Ordering Guide -20 ∼ +85°C AK4340ET AKD4340 Evaluation board for AK4340 Pin Layout MCLK BICK SDTI LRCK PDN SMUTE/CSN ACKS/CCLK DIF0/CDTI Rev.0.6 AKM CONFIDENTIAL 16pin TSSOP (0.65mm pitch Top View [AK4340] 16 GAIN TEST 15 P/S 14 VDD 13 VSS ...

Page 3

ASAHI KASEI No. Pin Name I/O 1 MCLK I 2 BICK I 3 SDTI I 4 LRCK I 5 PDN I SMUTE I 6 CSN I ACKS I 7 CCLK I DIF0 I 8 CDTI I 9 AOUTR O 10 ...

Page 4

ASAHI KASEI (VSS=0V; Note 1) Parameter Power Supply DAC Output Buffer Input Current (any pins except for supplies) Input Voltage Ambient Operating Temperature Storage Temperature Note 1. All voltages with respect to ground. WARNING: Operation at or beyond these limits ...

Page 5

ASAHI KASEI (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 Parameter Resolution Dynamic Characteristics THD+N fs=44.1kHz BW=20kHz fs=96kHz BW=40kHz fs=192kHz BW=40kHz Dynamic Range (-60dBFS with A-weighted) S/N (A-weighted) Interchannel Isolation (1kHz) Interchannel Gain ...

Page 6

ASAHI KASEI (Ta = 25°C; VDD = +4.5 ∼ +5.5V, HVEE = -13.2 ∼ -4.5V 44.1kHz, DEM = OFF) Parameter Digital filter ±0.05dB (Note 9) Passband -6.0dB Stopband (Note 9) Passband Ripple Stopband Attenuation Group Delay (Note 10) ...

Page 7

ASAHI KASEI (Ta=25°C; VDD = +4.5 ∼ +5.5V, HVEE = -13.2 ∼ -4.5V) Parameter Master Clock Frequency Duty Cycle LRCK Frequency Normal Speed Mode Double Speed Mode Quad Speed Mode Duty Cycle Audio Interface Timing BICK Period Normal Speed Mode ...

Page 8

ASAHI KASEI Timing Diagram MCLK tCLKH LRCK BICK tBCKH LRCK tBLR BICK SDTI Rev.0.6 AKM CONFIDENTIAL 1/fCLK tCLKL dCLK=tCLKH x fCLK, tCLKL x fCLK 1/fs tBCK tBCKL Figure 1. Clock Timing tLRB tSDS tSDH Figure 2. Serial Interface Timing - ...

Page 9

ASAHI KASEI CSN tCSS CCLK CDTI C1 CSN CCLK CDTI D3 PDN Rev.0.6 AKM CONFIDENTIAL tCCKL tCCKH tCDS tCDH C0 R/W Figure 3. WRITE Command Input Timing Figure 4. WRITE Data Input Timing tPD Figure 5. Power-down ...

Page 10

ASAHI KASEI System Clock The AK4340 requires MCLK, BICK and LRCK external clocks. The master clock (MCLK) should be synchronized with LRCK but the phase is not critical. The MCLK is used to operate the digital interpolation filter and the ...

Page 11

ASAHI KASEI Table 3. Sampling Speed (Auto Setting Mode: Default at Serial control mode) LRCK fs 128fs 192fs 32.0kHz - - 44.1kHz - - 48.0kHz - - 88.2kHz - - 96.0kHz - - 176.4kHz 22.5792 33.8688 192.0kHz 24.5760 36.8640 Table ...

Page 12

ASAHI KASEI LRCK BICK (32fs) SDTI Mode BICK (64fs) SDTI Don’t care Mode 0 15:MSB, 0:LSB Lch Data LRCK BICK (64fs) SDTI Don’t care Mode ...

Page 13

ASAHI KASEI LRCK BICK (64fs) SDTI 23 22 23:MSB, 0:LSB De-emphasis Filter A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc = 50/15µs) and is enabled or disabled with DEM0 and ...

Page 14

ASAHI KASEI Output Gain Setting Outputs level of AOUTL/AOUTR pin can be selected by GAIN pin. GAIN pin L H Soft Mute Operation Soft mute operation is performed in digital domain. When the SMUTE bit (SMUTE pin) goes to “1”(“H”), ...

Page 15

ASAHI KASEI Mode Control Interface Some function of the AK4340 can be controlled by pins (parallel control mode) shown in Table 11. The serial control interface is enabled by the P/S pin = “L”. Internal registers may be written to ...

Page 16

ASAHI KASEI Register Definitions Addr Register Name D7 00H Control 1 ACKS default 1 RSTN: Internal timing reset control 0: Reset. All registers are not initialized. 1: Normal Operation When MCLK frequency or DFS changes, the click noise can be ...

Page 17

ASAHI KASEI Addr Register Name D7 02H Control 3 0 default 0 INVR: Inverting Lch Output Polarity 0: Normal Output 1: Inverted Output INVL: Inverting Rch Output Polarity 0: Normal Output 1: Inverted Output Addr Register Name D7 03H Lch ...

Page 18

ASAHI KASEI Figure 13 and Figure 14 show the system connection diagram. An evaluation board (AKD4340) is available in order to allow an easy study on the layout of a surround circuit. Master Clock 64fs 24bit Audio Data fs Reset ...

Page 19

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

Page 20

ASAHI KASEI 16pin TSSOP (Unit: mm) *5.0±0 0.22 ± 0.1 0.13 M Seating Plane NOTE: Dimension "*" does not include mold flash. Package & Lead frame material Package molding compound: Lead frame material: Lead frame surface treatment: Rev.0.6 ...

Page 21

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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