AKM CONFIDENTIAL ASAHI KASEI [AK4340] AK4340 = Preliminary = 192kHz 24-Bit Stereo ∆Σ DAC with 2Vrms Output 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 I2S 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) MCLK P/S GAIN VDD SMUTE/CSN ACKS/CCLK De-emphasis Control µP Interface VSS Clock Divider HVEE DIF0/CDTI LRCK BICK SDTI Audio Data Interface ATT 8X Interpolator ∆Σ Modulator SCF LPF AOUTL ATT 8X Interpolator ∆Σ Modulator SCF LPF AOUTR PDN Rev.0.6 2005/11 -1- AKM CONFIDENTIAL ASAHI KASEI [AK4340] Ordering Guide -20 ∼ +85°C 16pin TSSOP (0.65mm pitch) Evaluation board for AK4340 AK4340ET AKD4340 Pin Layout MCLK 1 16 GAIN BICK 2 15 TEST SDTI 3 14 P/S LRCK 4 13 VDD PDN 5 12 VSS SMUTE/CSN 6 11 HVEE ACKS/CCLK 7 10 AOUTL DIF0/CDTI 8 9 AOUTR Top View Rev.0.6 2005/11 -2- AKM CONFIDENTIAL ASAHI KASEI [AK4340] PIN / FUNCTION No. Pin Name I/O Function Master Clock Input Pin 1 MCLK I 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 Power-Down Mode Pin 5 PDN I 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. Soft Mute Pin in parallel control mode SMUTE I 6 “H”: Enable, “L”: Disable CSN I Chip Select Pin in serial control mode Auto Setting Mode Pin in parallel control mode ACKS I “L”: Manual Setting Mode, “H”: Auto Setting Mode 7 CCLK I Control Data Clock Pin in serial control mode Audio Data Interface Format Pin in parallel control mode DIF0 I 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 Output Buffer Negative Power Supply Pin Normally connected to VSS with a 0.1µF ceramic capacitor in parallel with a 11 HVEE 10µF electrolytic cap. 12 VSS Ground Pin 13 VDD DAC Power Supply Pin Parallel/Serial Select Pin (Internal pull-up pin) 14 P/S I “L”: Serial control mode, “H”: Parallel control mode TEST pin 15 TEST I This pin should be connected to VDD. Output Gain Select Pin 16 GAIN I “L”: 0dB, “H”: +1.94dB Note: Do not allow digital input pins except pull-up pin to float. Rev.0.6 2005/11 -3- AKM CONFIDENTIAL ASAHI KASEI [AK4340] ABSOLUTE MAXIMUM RATINGS (VSS=0V; Note 1) Parameter Symbol min Power Supply DAC VDD -0.3 Output Buffer HVEE TBD Input Current (any pins except for supplies) IIN Input Voltage VIND -0.3 Ambient Operating Temperature Ta -20 Storage Temperature Tstg -65 max +6.0 TBD ±10 VDD+0.3 85 150 Units V V mA V °C °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 Power Supply DAC Output Buffer Symbol VDD HVEE min +4.5 -13.2 typ +5.0 -5.0 max +5.5 -4.5 Units V V Note 1. All voltages with respect to ground. *AKM assumes no responsibility for the usage beyond the conditions in this datasheet. Rev.0.6 2005/11 -4- ASAHI KASEI AKM CONFIDENTIAL [AK4340] 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; RL ≥5kΩ; unless otherwise specified) Parameter min typ max Units Resolution 24 Bits (Note 2) Dynamic Characteristics THD+N fs=44.1kHz 0dBFS -90 TBD dB BW=20kHz -60dBFS -39 dB fs=96kHz 0dBFS -90 dB BW=40kHz -60dBFS -36 dB fs=192kHz 0dBFS -90 dB BW=40kHz -60dBFS -36 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 Output Voltage (Note 5) GAIN pin = “L” TBD 2 TBD Vrms GAIN pin = “H” TBD 2.5 TBD Vrms Load Capacitance (Note 6) 25 pF Load Resistance 5 kΩ Power Supplies Power Supply Current: (Note 7) Normal Operation (PDN pin = “H”, fs≤96kHz) mA TBD 22 VDD mA TBD 8 HVEE Normal Operation (PDN pin = “H”, fs=192kHz) mA TBD 25 VDD mA TBD 8 HVEE Power-Down Mode (PDN pin = “L”) (Note 8) TBD 10 µA VDD TBD 10 HVEE µA 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. Rev.0.6 2005/11 -5- ASAHI KASEI AKM CONFIDENTIAL [AK4340] FILTER CHARACTERISTICS (Ta = 25°C; VDD = +4.5 ∼ +5.5V, HVEE = -13.2 ∼ -4.5V; fs = 44.1kHz, DEM = OFF) Parameter Symbol min typ Digital filter PB 0 Passband ±0.05dB (Note 9) 22.05 -6.0dB Stopband (Note 9) SB 24.1 Passband Ripple PR Stopband Attenuation SA 54 Group Delay (Note 10) GD 19.3 Digital Filter + LPF Frequency Response 20.0kHz fs=44.1kHz FR ± 0.03 40.0kHz fs=96kHz FR ± 0.03 80.0kHz fs=192kHz FR ± 0.03 max Units 20.0 - - kHz kHz kHz dB dB 1/fs - dB dB dB ± 0.02 Note 9. The passband and stopband frequencies scale with fs (system sampling rate). For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs. Note 10. Delay time caused by digital filtering. This time is from setting the 16/24bit data of both channels to input register to the output of analog signal. DC CHARACTERISTICS (Ta=25°C; VDD = +4.5 ∼ +5.5V, HVEE = -13.2 ∼ -4.5V) Parameter Symbol min High-Level Input Voltage VIH 2.2 Low-Level Input Voltage VIL Input Leakage Current (Note 11) Iin - typ - max 0.8 ± 10 Units V V µA Note 11. P/S pin is pulled-up internally. (typ. 100kΩ) Rev.0.6 2005/11 -6- ASAHI KASEI AKM CONFIDENTIAL SWITCHING CHARACTERISTICS (Ta=25°C; VDD = +4.5 ∼ +5.5V, HVEE = -13.2 ∼ -4.5V) Parameter Symbol min typ fCLK 2.048 11.2896 Master Clock Frequency Duty Cycle dCLK 40 LRCK Frequency Normal Speed Mode fsn 8 Double Speed Mode fsd 60 Quad Speed Mode fsq 120 Duty Cycle Duty 45 Audio Interface Timing BICK Period 1/128fsn tBCK Normal Speed Mode 1/64fsd tBCK Double Speed Mode 1/64fsq tBCK Quad Speed Mode 30 tBCKL BICK Pulse Width Low 30 tBCKH Pulse Width High 20 tBLR BICK rising to LRCK Edge (Note 12) 20 tLRB LRCK Edge to BICK rising (Note 12) 20 tSDH SDTI Hold Time 20 tSDS SDTI Setup Time Control Interface Timing 200 tCCK CCLK Period 80 tCCKL CCLK Pulse Width Low 80 tCCKH Pulse Width High 40 tCDS CDTI Setup Time 40 tCDH CDTI Hold Time 150 tCSW CSN High Time 50 tCSS CSN “↓” to CCLK “↑” 50 tCSH CCLK “↑” to CSN “↑” Reset Timing PDN Pulse Width (Note 13) tPD 150 [AK4340] max 36.864 60 Units MHz % 48 96 192 55 kHz kHz kHz % ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Note 12. BICK rising edge must not occur at the same time as LRCK edge. Note 13. The AK4340 can be reset by bringing PDN pin = “L”. Rev.0.6 2005/11 -7- AKM CONFIDENTIAL ASAHI KASEI [AK4340] Timing Diagram 1/fCLK VIH MCLK VIL tCLKH tCLKL dCLK=tCLKH x fCLK, tCLKL x fCLK 1/fs VIH LRCK VIL tBCK VIH BICK VIL tBCKH tBCKL Figure 1. Clock Timing VIH LRCK VIL tBLR tLRB VIH BICK VIL tSDS tSDH VIH SDTI VIL Figure 2. Serial Interface Timing Rev.0.6 2005/11 -8- AKM CONFIDENTIAL ASAHI KASEI [AK4340] VIH CSN VIL tCSS tCCKL tCCKH VIH CCLK VIL tCDS C1 CDTI tCDH C0 R/W VIH A4 VIL Figure 3. WRITE Command Input Timing tCSW VIH CSN VIL tCSH VIH CCLK CDTI VIL D3 D2 D1 D0 VIH VIL Figure 4. WRITE Data Input Timing tPD PDN VIL Figure 5. Power-down Timing Rev.0.6 2005/11 -9- AKM CONFIDENTIAL ASAHI KASEI [AK4340] OPERATION OVERVIEW 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 delta-sigma modulator. There are two methods to set MCLK frequency. In Manual Setting Mode (ACKS = “0”: Register 00H), the sampling speed is set by DFS0/1 (Table 1). The frequency of MCLK at each sampling speed is set automatically. (Table 2) After exiting reset (PDN pin = “↑”), the AK4340 is in Auto Setting Mode. In Auto Setting Mode (ACKS = “1”: Default), as MCLK frequency is detected automatically (Table 3), and the internal master clock becomes the appropriate frequency (Table 4), it is not necessary to set DFS0/1. In parallel control mode, the sampling speed can be set by only ACKS pin. The internal DFS0 and DFS1 bits are fixed to “0”. Therefore, when ACKS pin is “L”, the AK4340 operates in Normal Speed Mode. The AK4340 operates in Auto Setting Mode at ACKS pin = “H”. In parallel control mode, the AK4340 does not support 128fs and 192fs of Double Speed Mode. All external clocks (MCLK, BICK and LRCK) should always be present whenever the AK4340 is in the normal operation mode (PDN pin = “H”). If these clocks are not provided, the AK4340 may draw excess current and may fall into unpredictable operation. This is because the device utilizes dynamic refreshed logic internally. The AK4340 should be reset by PDN pin = “L” after threse clocks are provided. If the external clocks are not present, the AK4340 should be in the power-down mode (PDN pin = “L”). After exiting reset at power-up etc., the AK4340 is in the power-down mode until MCLK and LRCK are input. DFS1 DFS0 0 0 Normal Speed Mode Sampling Rate (fs) 8kHz~48kHz 0 1 Double Speed Mode 60kHz~96kHz 1 0 Quad Speed Mode 120kHz~192kHz Default Table 1. Sampling Speed (Manual Setting Mode) DFS1 DFS0 0 0 0 0 0 1 1 0 0 0 1 1 0 0 Sampling Speed Normal Double Quad LRCK (kHz) fs 32.0 44.1 48.0 88.2 96.0 176.4 192.0 MCLK(MHz) 128fs 11.2896 12.2880 22.5792 24.5760 192fs 16.9344 18.4320 33.8688 36.8640 256fs 8.1920 11.2896 12.2880 22.5792 24.5760 - 384fs 12.2880 16.9344 18.4320 33.8688 36.8640 - 512fs 16.3840 22.5792 24.5760 - 768fs 24.5760 33.8688 36.8640 - 1152fs 36.8640 - BICK (MHz) 64fs 2.0480 2.8224 3.0720 5.6448 6.1440 11.2896 12.2880 Table 2. System Clock Example (Manual Setting Mode) Rev.0.6 2005/11 - 10 - AKM CONFIDENTIAL ASAHI KASEI MCLK 1152fs 512fs 768fs 256fs 384fs 128fs 192fs [AK4340] Sampling Speed Normal (fs=32kHz Only) Normal Double Quad Table 3. Sampling Speed (Auto Setting Mode: Default at Serial control mode) LRCK fs 32.0kHz 44.1kHz 48.0kHz 88.2kHz 96.0kHz 176.4kHz 192.0kHz 128fs 22.5792 24.5760 192fs 33.8688 36.8640 256fs 22.5792 24.5760 - MCLK (MHz) 384fs 512fs 16.3840 22.5792 24.5760 33.8688 36.8640 - 768fs 24.5760 33.8688 36.8640 - 1152fs 36.8640 - Sampling Speed Normal Double Quad Table 4. System Clock Example (Auto Setting Mode) Audio Serial Interface Format Data is shifted in via the SDTI pin using BICK and LRCK inputs. In serial control mode, five serial data mode can be selected by DIF2-0 bits. (See Table 5). In parallel control mode, two serial data mode can be selected by DIF0 pin. (See Table 6) In all modes the serial data is MSB-first, 2’s compliment format and is latched on the rising edge of BICK. Mode 2 can be used for 16/20 MSB justified formats by zeroing the unused LSBs. Mode 0 1 2 3 4 DIF2 0 0 0 0 1 DIF1 0 0 1 1 0 DIF0 0 1 0 1 0 SDTI Format 16bit LSB Justified 20bit LSB Justified 24bit MSB Justified 24bit I2S Compatible 24bit LSB Justified BICK ≥32fs ≥40fs ≥48fs ≥48fs ≥48fs Figure Figure 6 Figure 7 Figure 8 Figure 9 Figure 7 Default Table 5. Audio Data Format in Serial control mode Mode 2 3 DIF0 0 1 SDTI Format 24bit MSB Justified 24bit I2S Compatible BICK ≥48fs ≥48fs Figure Figure 8 Figure 9 Table 6. Audio Data Format in Parallel control mode Rev.0.6 2005/11 - 11 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] LRCK 0 1 10 11 12 13 14 15 0 1 10 11 12 13 14 15 0 1 BICK (32fs) SDTI Mode 0 15 14 6 1 0 5 14 4 15 3 2 16 1 17 0 31 15 0 14 6 5 14 1 4 15 3 16 2 1 17 0 31 15 14 0 1 0 1 0 1 BICK (64fs) SDTI Mode 0 Don’t care 15 14 Don’t care 0 15 14 0 15:MSB, 0:LSB Lch Data Rch Data Figure 6. Mode 0 Timing LRCK 0 1 8 9 10 11 12 31 0 1 8 9 10 11 12 31 BICK (64fs) SDTI Mode 1 Don’t care 19 0 Don’t care 19 0 Don’t care 19 0 19 0 19:MSB, 0:LSB SDTI Mode 4 Don’t care 23 22 21 20 23 22 20 21 23:MSB, 0:LSB Lch Data Rch Data Figure 7. Mode 1,4 Timing LRCK 0 1 2 22 23 24 30 31 0 1 2 22 23 24 30 31 BICK (64fs) SDTI 23 22 1 0 Don’t care 23 22 1 0 Don’t care 23 22 23:MSB, 0:LSB Lch Data Rch Data Figure 8. Mode 2 Timing Rev.0.6 2005/11 - 12 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] LRCK 0 1 2 3 23 24 25 31 0 1 2 3 23 24 25 31 0 1 BICK (64fs) SDTI 0 1 23 22 Don’t care 23 22 1 0 Don’t care 23 23:MSB, 0:LSB Lch Data Rch Data Figure 9. Mode 3 Timing 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 DEM1. In case of double speed and quad speed mode, the digital de-emphasis filter is always OFF. DEM1 DEM0 Mode 0 0 1 1 0 1 0 1 44.1kHz OFF 48kHz 32kHz Default Table 7. De-emphasis Filter Control (Normal Speed Mode) Output Volume The AK4340 includes channel independent digital output volumes (ATT) with 256 levels at linear step including MUTE. These volumes are in front of the DAC and can attenuate the input data from 0dB to –48dB and mute. When changing levels, transitions are executed via soft changes; thus no switching noise occurs during these transitions. The transition time of 1 level and all 256 levels is shown in Table 8. Sampling Speed Normal Speed Mode Double Speed Mode Quad Speed Mode Transition Time 1 Level 255 to 0 4LRCK 1020LRCK 8LRCK 2040LRCK 16LRCK 4080LRCK Table 8. ATT Transition Time Rev.0.6 2005/11 - 13 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] Output Gain Setting Outputs level of AOUTL/AOUTR pin can be selected by GAIN pin. GAIN pin L H GAIN 0dB +1.94dB Output Level (VDD=5V) 2Vrms (typ) 2.5Vrms (typ) Figure 10. Output Level Setting Soft Mute Operation Soft mute operation is performed in digital domain. When the SMUTE bit (SMUTE pin) goes to “1”(“H”), the output signal is attenuated by -∞ during ATT_DATA×ATT transition time (Table 8) from the current ATT level. When the SMUTE bit (SMUTE pin) is returned to “0” (“L”), the mute is cancelled and the output attenuation gradually changes to the ATT level during ATT_DATA×ATT transition time. If the soft mute is cancelled before attenuating to -∞ after starting the operation, the attenuation is discontinued and returned to ATT level by the same cycle. The soft mute is effective for changing the signal source without stopping the signal transmission. SMUTE bit or SMUTE pin ATT Level (1) (1) (3) Attenuation -∞ GD (2) GD AOUT Notes: (1) ATT_DATA×ATT transition time (Table 8). For example, in Normal Speed Mode, this time is 1020LRCK cycles (1020/fs) at ATT_DATA=255. (2) The analog output corresponding to the digital input has a group delay, GD. (3) If the soft mute is cancelled before attenuating to -∞ after starting the operation, the attenuation is discontinued and returned to ATT level by the same cycle. Figure 11. Soft Mute function System Reset The AK4340 should be reset once by bringing PDN pin = “L” upon power-up. The AK4340 is powered up and the internal timing starts clocking by LRCK “↑” after exiting reset and power down state by MCLK. The AK4340 is in the power-down mode until MCLK and LRCK are input. Rev.0.6 2005/11 - 14 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] 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 3-wire µP interface pins, CSN, CCLK and CDTI. The data on this interface consists of Chip Address (2bits, C1/0; fixed to “01”), Read/Write (1bit; fixed to “1”, Write only), Register Address (MSB first, 5bits) and Control Data (MSB first, 8bits). The AK4340 latches the data on the rising edge of CCLK, so data should clocked in on the falling edge. The writing of data becomes valid by CSN “↑”. The clock speed of CCLK is 5MHz (max). Function Parallel control mode Serial control mode Double sampling mode at 128/192fs X De-emphasis X SMUTE O 16/20/24bit LSB justified format X Table 11. Function list (O: available, X: not available) O O O O PDN pin = “L” resets the registers to their default values. When the state of P/S pin is changed, the AK4340 should be reset by PDN pin = “L”. The internal timing circuit is reset by RSTN bit, but the registers are not initialized. CSN 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CCLK CDTI C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 C1-C0: R/W: A4-A0: D7-D0: Chip Address (Fixed to “01”) READ/WRITE (Fixed to “1”, Write only) Register Address Control Data Figure 12. Control I/F Timing *The AK4340 does not support the read command and chip address. C1/0 and R/W are fixed to “011” *When the AK4340 is in the power down mode (PDN pin = “L”) or the MCLK is not provided, writing into the control register is inhibited. Register Map Addr Register Name D7 D6 D5 D4 D3 D2 D1 D0 00H 01H 02H 03H 04H Notes: Control 1 Control 2 Control 3 Lch ATT Rch ATT ACKS 0 0 ATT7 ATT7 0 0 0 ATT6 ATT6 0 0 0 ATT5 ATT5 DIF2 DFS1 INVL ATT4 ATT4 DIF1 DFS0 INVR ATT3 ATT3 DIF0 DEM1 0 ATT2 ATT2 PW DEM0 0 ATT1 ATT1 RSTN SMUTE 0 ATT0 ATT0 For addresses from 05H to 1FH, data must not be written. When PDN pin goes “L”, the registers are initialized to their default values. When RSTN bit goes “0”, the only internal timing is reset and the registers are not initialized to their default values. All data can be written to the register even if PW or RSTN bit is “0”. Rev.0.6 2005/11 - 15 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] Register Definitions Addr Register Name 00H D7 D6 D5 D4 D3 D2 D1 D0 Control 1 ACKS 0 0 DIF2 DIF1 DIF0 PW RSTN default 1 0 0 0 1 0 1 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 reduced by RSTN bit. PW: Power down control 0: Power down. All registers are not initialized. 1: Normal Operation DIF2-0: Audio data interface formats (see Table 5) Initial: “010”, Mode 2 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, the settings of DFS1-0 are ignored. When this bit is “0”, DFS1-0 set the sampling speed mode. Addr Register Name 01H D7 D6 D5 D4 D3 D2 D1 D0 Control 2 0 0 0 DFS1 DFS0 DEM1 DEM0 SMUTE default 0 0 0 0 0 0 1 0 SMUTE: Soft Mute Enable 0: Normal operation 1: DAC outputs soft-muted DEM1-0: De-emphasis Response (see Table 7) Initial: “01”, OFF DFS1-0: Sampling speed control 00: Normal Speed Mode 01: Double Speed Mode 10: Quad Speed Mode When changing between Normal/Double Speed Mode and Quad Speed Mode, some click noise occurs. Rev.0.6 2005/11 - 16 - AKM CONFIDENTIAL ASAHI KASEI Addr Register Name 02H [AK4340] D7 D6 D5 D4 D3 D2 D1 D0 Control 3 0 0 0 INVL INVR 0 0 0 default 0 0 0 0 0 0 0 0 D6 ATT6 ATT6 1 D5 ATT5 ATT5 1 D4 ATT4 ATT4 1 D3 ATT3 ATT3 1 D2 ATT2 ATT2 1 D1 ATT1 ATT1 1 D0 ATT0 ATT0 1 INVR: Inverting Lch Output Polarity 0: Normal Output 1: Inverted Output INVL: Inverting Rch Output Polarity 0: Normal Output 1: Inverted Output Addr 03H 04H Register Name Lch ATT Rch ATT default D7 ATT7 ATT7 1 ATT = 20 log10 (ATT_DATA / 255) [dB] 00H: Mute Rev.0.6 2005/11 - 17 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] SYSTEM DESIGN 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 1 MCLK GAIN 16 64fs 2 BICK TEST 15 24bit Audio Data 3 SDTI P/S 14 4 LRCK VDD 13 5 PDN VSS 12 6 CSN HVEE 11 7 CCLK AOUTL 10 Lch Out 8 CDTI AOUTR 9 Rch Out fs Reset & Power down µP Digital Ground AK4340 0.1u 10u 0.1u +5V Analog Supply + + 10u Negative Analog Supply Analog Ground Figure 13. Typical Connection Diagram (Serial Control Mode, GAIN=0dB) Master Clock 1 MCLK GAIN 16 64fs 2 BICK TEST 15 24bit Audio Data 3 SDTI P/S 14 4 LRCK VDD 13 5 PDN VSS 12 6 SMUTE HVEE 11 7 ACKS AOUTL 10 Lch Out 8 DIF0 AOUTR 9 Rch Out fs Reset & Power down Mode Setting Digital Ground AK4340 0.1u 10u 0.1u +5V Analog Supply + + 10u Negative Analog Supply Analog Ground Figure 14. Typical Connection Diagram (Parallel Control Mode, GAIN=0dB) Notes: - LRCK = fs, BICK = 64fs. - When AOUT drives some capacitive load, some resistor should be added in series between AOUT and capacitive load. - All input pins except for pull-up pin must not be left floating. Rev.0.6 2005/11 - 18 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] 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 VDD and HVEE as possible. The differential Voltage between VDD and VSS pins set the analog output range. Power-up sequence between VDD and HVEE is not critical. 2. Analog Outputs The analog outputs are single-ended and centered around the ground (VSS). The output signal range is typically 2Vrms (@VDD=5V & GAIN pin = “L”). The phase of the analog outputs can be inverted channel independently by INVL/INVR bits. The internal switched capacitor filter (SCF) and continuous time filter (CTF) attenuate the noise generated by the delta-sigma modulator beyond the audio passband. If the noise generated by the delta-sigma modulator beyond the audio band would be the problem, the 1st order filter is required. (See Figure 15) The output voltage is a positive full scale for 7FFFFFH (@24bit) and a negative full scale for 800000H (@24bit). The ideal output is 0V(VSS) for 000000H (@24bit). 470 Analog Out AOUT 2.2n Figure 15. External 1st order LPF Circuit Example (fc = 154kHz, gain = -0.28dB @ 40kHz, gain = -1.04dB @ 80kHz) Rev.0.6 2005/11 - 19 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] PACKAGE 16pin TSSOP (Unit: mm) *5.0±0.1 9 A 8 1 0.13 M 6.4±0.2 *4.4±0.1 16 1.05±0.05 0.22±0.1 0.65 0.17±0.05 Detail A 0.5±0.2 0.1±0.1 Seating Plane 0.10 NOTE: Dimension "*" does not include mold flash. 0-10° Package & Lead frame material Package molding compound: Lead frame material: Lead frame surface treatment: Epoxy Cu Solder (Pb free) plate Rev.0.6 2005/11 - 20 - AKM CONFIDENTIAL ASAHI KASEI [AK4340] MARKING AKM 4340ET XXYYY 1) 2) 3) 4) Pin #1 indication Date Code : XXYYY (5 digits) XX: Lot# YYY: Date Code Marketing Code : 4340ET Asahi Kasei Logo IMPORTANT NOTICE • 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 no liability for infringement of any patent, intellectual property, or other right in the application or use of any information contained herein. • Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. • AKM products are neither intended nor authorized for use as critical components in any safety, life support, or other hazard related device or system, and AKM assumes no responsibility relating to any such use, except with the express written consent of the Representative Director of AKM. As used here: (a) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. (b) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. • It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or otherwise places the product with a third party to notify that party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification. Rev.0.6 2005/11 - 21 -