AK4626AVQ Asahi Kasei Microsystems, AK4626AVQ Datasheet

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AK4626AVQ

Manufacturer Part Number
AK4626AVQ
Description
Manufacturer
Asahi Kasei Microsystems
Datasheet

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ASAHI KASEI
The AK4626A is a single chip CODEC that includes two channels of ADC and six channels of DAC. The
ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ADC has the Enhanced Dual Bit
architecture with wide dynamic range. The DAC introduces the newly developed Advanced Multi-Bit
architecture, and achieves wider dynamic range and lower outband noise. An auxiliary digital audio input
interface maybe used instead of the ADC for passing audio data to the primary audio output port. Control
may be set directly by pins or programmed through a separate serial interface.
The AK4626A has a dynamic range of 102dB for ADC, 106dB for DAC and is well suited for digital
surround for home theater and car audio. An AC-3 system can be built with a IEC60958(SPDIF) receiver
such as the AK4112B. The AK4626A is available in a small 44pin LQFP package which will reduce
system space.
MS0397-E-00
*AC-3 is a trademark of Dolby Laboratories.
2ch 24bit ADC
6ch 24bit DAC
High Jitter Tolerance
TTL Level Digital I/F
3-wire Serial and I
Master clock:256fs, 384fs or 512fs for fs=32kHz to 48kHz
Power Supply: 4.5 to 5.5V
Power Supply for output buffer: 2.7 to 5.5V
Small 44pin LQFP
AK4626 Pin Compatible
High Performance Multi-channel Audio CODEC
- 64x Oversampling
- Sampling Rate up to 96kHz
- Linear Phase Digital Anti-Alias Filter
- Single-Ended Input
- S/(N+D): 92dB
- Dynamic Range, S/N: 102dB
- Digital HPF for offset cancellation
- I/F format: MSB justified, I
- Overflow flag
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Single-Ended Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 90dB
- Dynamic Range, S/N: 106dB
- I/F format: MSB justified, LSB justified(20bit,24bit), I
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- De-emphasis for 32kHz, 44.1kHz and 48kHz
- Zero Detect Function
128fs, 192fs or 256fs for fs=64kHz to 96kHz
128fs for fs=120kHz to 192kHz
GENERAL DESCRIPTION
2
C Bus µP I/F for mode setting
FEATURES
- 1 -
2
S or TDM
2
AK4626A
S or TDM
[AK4626A]
2005/06

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AK4626AVQ Summary of contents

Page 1

ASAHI KASEI High Performance Multi-channel Audio CODEC The AK4626A is a single chip CODEC that includes two channels of ADC and six channels of DAC. The ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ...

Page 2

ASAHI KASEI Block Diagram ADC LIN RIN ADC LPF DAC LOUT1 ROUT1 LPF DAC DAC LOUT2 LPF ROUT2 LPF DAC DAC LOUT3 LPF ROUT3 LPF DAC AK4626A Block Diagram (DIR and AC-3 DSP are external parts) MS0397-E-00 Audio I/F HPF ...

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... AKD4626 Pin Layout SDOS 1 I2C 2 SMUTE 3 BICK 4 LRCK 5 SDTI1 6 SDTI2 7 SDTI3 8 SDTO 9 DAUX 10 DFS0 11 MS0397-E-00 -40 ∼ +85°C 44pin LQFP(0.8mm pitch) Evaluation Board for AK4626A AK4626AVQ Top View - 3 - [AK4626A] 33 DZF2/OVF 32 RIN 31 LIN TST5 28 ROUT1 27 LOUT1 26 ROUT2 25 LOUT2 24 ROUT3 23 LOUT3 2005/06 ...

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ASAHI KASEI Compatibility with AK4527B 1. Functions Functions AK4527B DAC Sampling frequency Up to 96kHz TDM128 (96kHz) Not available Digital Attenuator 256 levels Soft Mute Soft mute function is independent of Digital attenuator. Analog Input (ADC) Differential input 2. Pin ...

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ASAHI KASEI No. Pin Name I/O 1 SDOS I SDTO Source Select Pin “L”: Internal ADC output, “H”: DAUX input SDOS pin should be set to “L” when TDM= “1”. 2 I2C I Control Mode Select Pin “L”: 3-wire Serial, ...

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ASAHI KASEI No. Pin Name I/O 23 LOUT3 O DAC3 Lch Analog Output Pin 24 ROUT3 O DAC3 Rch Analog Output Pin 25 LOUT2 O DAC2 Lch Analog Output Pin 26 ROUT2 O DAC2 Rch Analog Output Pin 27 LOUT1 ...

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ASAHI KASEI (AVSS, DVSS=0V; Note 5) Parameter Power Supplies Analog Digital Output buffer |AVSS-DVSS| Input Current (any pins except for supplies) Analog Input Voltage Digital Input Voltage (Expect LRCK, BICK pins) (LRCK, BICK pins) Ambient Temperature (power applied) Storage Temperature ...

Page 8

ASAHI KASEI (Ta=25°C; AVDD, DVDD, TVDD=5V; AVSS, DVSS=0V; VREFH=AVDD; fs=48kHz; BICK=64fs; Signal Frequency=1kHz; 24bit Data; Measurement Frequency=20Hz∼20kHz at 48kHz, 20Hz~40kHz at fs=96kHz, 20Hz~40kHz at fs=192kHz; unless otherwise specified) Parameter ADC Analog Input Characteristics Resolution S/(N+D) (-0.5dBFS) fs=48kHz fs=96kHz DR (-60dBFS) ...

Page 9

ASAHI KASEI Parameter Power Supplies Power Supply Current (AVDD+DVDD+TVDD) Normal Operation (PDN = “H”) AVDD fs=48kHz,96kHz fs=192kHz DVDD+TVDD fs=48kHz fs=96kHz fs=192kHz Power-down mode (PDN = “L”) TST=”L” Notes: 12. TVDD=0.1mA(typ). 13. In the power-down mode. All digital input pins including ...

Page 10

ASAHI KASEI (Ta=25°C; AVDD, DVDD=4.5∼5.5V; TVDD=2.7∼5.5V; fs=48kHz) Parameter ADC Digital Filter (Decimation LPF): Passband (Note 14) Stopband Passband Ripple Stopband Attenuation Group Delay (Note 15) Group Delay Distortion ADC Digital Filter (HPF): Frequency Response (Note 14) DAC Digital Filter: Passband ...

Page 11

ASAHI KASEI (Ta=-40°C∼85°C; AVDD, DVDD=4.5∼5.5V; TVDD=2.7∼5.5V; C Parameter Master Clock Timing 256fsn, 128fsd: Pulse Width Low Pulse Width High 384fsn, 192fsd: Pulse Width Low Pulse Width High 512fsn, 256fsd: Pulse Width Low Pulse Width High LRCK Timing Normal mode (TDM0= ...

Page 12

ASAHI KASEI Parameter Control Interface Timing (3-wire Serial mode): CCLK Period CCLK Pulse Width Low Pulse Width High CDTI Setup Time CDTI Hold Time CSN “H” Time CSN “↓” to CCLK “↑” CCLK “↑” to CSN “↑” 2 Control Interface ...

Page 13

ASAHI KASEI Timing Diagram MCLK LRCK BICK MCLK LRCK BICK MS0397-E-00 1/fCLK tCLKH tCLKL 1/fsn, 1/fsd tBCK tBCKH tBCKL Clock Timing (TDM= “0”) 1/fCLK tCLKH tCLKL 1/fs tLRH tLRL tBCK tBCKH tBCKL Clock Timing (TDM= “1” [AK4626A] ...

Page 14

ASAHI KASEI LRCK tBLR BICK tLRS SDTO SDTI LRCK tBLR BICK SDTO SDTI MS0397-E-00 tLRB tSDS tSDH Audio Interface Timing (TDM= “0”) tLRB tSDS tSDH Audio Interface Timing (TDM= “1” [AK4626A] VIH VIL VIH VIL tBSD 50%TVDD ...

Page 15

ASAHI KASEI CSN tCSS CCLK CDTI WRITE Command Input Timing (3-wire Serial mode) CSN CCLK CDTI D3 WRITE Data Input Timing (3-wire Serial mode) SDA tBUF tLOW tR SCL tHD:STA tHD:DAT Stop Start tPD PDN SDTO MS0397-E-00 tCCKL tCCKH tCDS ...

Page 16

ASAHI KASEI System Clock The external clocks, which are required to operate the AK4626A, are MCLK, LRCK and BICK. MCLK should be synchronized with LRCK but the phase is not critical. There are two methods to set MCLK frequency. In ...

Page 17

ASAHI KASEI Table 5. Sampling Speed (Auto Setting Mode) LRCK fs 32.0kHz 44.1kHz 48.0kHz 88.2kHz 96.0kHz 176.4kHz 192.0kHz Table 6. System Clock Example (Auto Setting Mode) De-emphasis Filter The AK4626A includes the digital de-emphasis filter (tc=50/15µs) by IIR filter. De-emphasis ...

Page 18

ASAHI KASEI Audio Serial Interface Format When TDM= “L”, four modes can be selected by the DIF1-0 as shown in Table 8. In all modes the serial data is MSB-first, 2’s compliment format. The SDTO is clocked out on the ...

Page 19

ASAHI KASEI LRCK BICK(64fs) SDTO( SDTI(i) Don’t Care 19 SDTO-23:MSB, 0:LSB; SDTI-19:MSB, 0:LSB LRCK BICK(64fs) SDTO( SDTI(i) Don’t Care 23 23:MSB, 0:LSB ...

Page 20

ASAHI KASEI LRCK BICK(256fs) SDTO( Lch 32 BICK SDTI1( BICK LRCK BICK(256fs) SDTO( Lch 32 BICK SDTI1( BICK LRCK BICK(256fs) SDTO( ...

Page 21

ASAHI KASEI LRCK BICK(128fs) SDTO( Lch 32 BICK SDTI1( BICK SDTI2( BICK LRCK BICK(128fs Lch 32 BICK SDTI1( BICK SDTI2( ...

Page 22

ASAHI KASEI LRCK BICK(128fs) SDTO( Lch 32 BICK SDTI1( BICK SDTI2( BICK MS0397-E-00 128 BICK Rch 32 BICK ...

Page 23

ASAHI KASEI Overflow Detection The AK4626A has overflow detect function for analog input. Overflow detect function is enable if OVFE bit is set to “1” at serial control mode. OVF pin goes to “H” if analog input of Lch or ...

Page 24

ASAHI KASEI Digital Attenuator The AK4626A has channel-independent digital attenuator (128 levels, 0.5dB step). Attenuation level of each channel can be set by each ATT7-0 bits (Table 13). ATT7-0 Table 13. Attenuation level of digital attenuator Transition time between set ...

Page 25

ASAHI KASEI Soft mute operation Soft mute operation is performed at digital domain. When the SMUTE pin goes to “H”, the output signal is attenuated by -∞ during ATT_DATA×ATT transition time (Table 14) from the current ATT level. When the ...

Page 26

ASAHI KASEI Power-Down The ADC and DACs of AK4626A are placed in the power-down mode by bringing PDN “L” and both digital filters are reset at the same time. PDN “L” also reset the control registers to their default values. ...

Page 27

ASAHI KASEI Reset Function When RSTN = “0”, ADC and DACs are powered-down but the internal register are not initialized. The analog outputs go to VCOM voltage, DZF1-2 pins go to “H” and SDTO pin goes to “L”. Because some ...

Page 28

ASAHI KASEI Serial Control Interface The AK4626A can control its functions via registers. Internal registers may be written by 2 types of control mode. The chip address is determined by the state of the CAD0 and CAD1 inputs. PDN = ...

Page 29

ASAHI KASEI 2 (2) I C-bus Control Mode (I2C= “H”) AK4626A supports the standard-mode C-bus system (max:400kHz). The CSN pin should be connected to DVDD at the I Figure 17 shows the data transfer sequence at the ...

Page 30

ASAHI KASEI SDA SCL S start condition DATA OUTPUT BY MASTER DATA OUTPUT BY SLAVE(AK4529) SCL FROM MASTER S START CONDITION SDA SCL MS0397-E-00 Figure 21. START and STOP conditions Figure 22. Acknowledge on the I C-bus ...

Page 31

ASAHI KASEI Mapping of Program Registers Addr Register Name 00H Control 1 01H Control 2 02H LOUT1 Volume Control ATT7 03H ROUT1 Volume Control ATT7 04H LOUT2 Volume Control ATT7 05H ROUT2 Volume Control ATT7 06H LOUT3 Volume Control ATT7 ...

Page 32

ASAHI KASEI Register Definitions Addr Register Name 00H Control 1 Default SMUTE: Soft Mute Enable 0: Normal operation 1: All DAC outputs soft-muted Register bit of SMUTE is ORed with the SMUTE pin if P/S = “L”. DIF1-0: Audio Data ...

Page 33

ASAHI KASEI Addr Register Name 01H Control 2 Default ACKS: Master Clock Frequency Auto Setting Mode Enable 0: Disable, Manual Setting Mode 1: Enable, Auto Setting Mode Master clock frequency is detected automatically at ACKS bit “1”. In this case, ...

Page 34

ASAHI KASEI Addr Register Name 02H LOUT1 Volume Control 03H ROUT1 Volume Control 04H LOUT2 Volume Control 05H ROUT2 Volume Control 06H LOUT3 Volume Control 07H ROUT3 Volume Control Default ATT7-0: Attenuation Level (see Table 13.) Addr Register Name 08H ...

Page 35

ASAHI KASEI Addr Register Name 09H ATT speed & Reset Control Default RSTN: Internal timing reset 0: Reset. DZF1-2 pins go to “H”, but registers are not initialized. 1: Normal operation ATS1-0: Digital attenuator transition time setting (see Table 14.) ...

Page 36

ASAHI KASEI Figure 24 shows the system connection diagram. An evaluation board is available which demonstrates application circuits, the optimum layout, power supply arrangements and measurement results. Condition: TVDD=5V, 3-wire serial control mode, CAD1-0 = “00” uP Digital Audio Source ...

Page 37

ASAHI KASEI Digital Ground System Controller Note: AVSS and DVSS must be connected to the same analog ground plane. 1. Grounding and Power Supply Decoupling The AK4626A requires careful attention to power supply and grounding arrangements. AVDD and DVDD are ...

Page 38

ASAHI KASEI 4. Analog Outputs The analog outputs are also single-ended and centered around the VCOM voltage. The input signal range scales with the supply voltage and nominally 0.6 x VREFH Vpp. The DAC input data format is 2’s complement. ...

Page 39

ASAHI KASEI 44pin LQFP (Unit: mm) 12.80±0.30 10. 0.37±0.10 0.15 Package & Lead frame material Package molding compound: Lead frame material: Lead frame surface treatment: MS0397-E-00 PACKAGE 1.70max 0°∼10° 0.60±0.20 Epoxy Cu ...

Page 40

... AKM harmless from any and all claims arising from the use of said product in the absence of such notification. MS0397-E-00 MARKING AK4626AVQ XXXXXXX 1 1) Pin #1 indication 2) Date Code: XXXXXXX(7 digits) 3) Marking Code: AK4626AVQ 4) Asahi Kasei Logo Revision History Page Contents IMPORTANT NOTICE - 40 - [AK4626A] 2005/06 ...

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