AK4440 AKM [Asahi Kasei Microsystems], AK4440 Datasheet

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AK4440

Manufacturer Part Number
AK4440
Description
192kHz 24-Bit 8ch DAC with 2Vrms Output
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet

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The AK4440 is a 5V 24-bit 8ch DAC with an integrated 2Vrms output buffer. A charge pump in the buffer
develops an internal negative power supply rail that enables a ground-referenced 2Vrms output. Using
AKM’s multi bit modulator architecture, the AK4440 delivers a wide dynamic range while preserving
linearity for improved THD+N performance. The AK4440 integrates a combination of switched-capacitor
and continuous-time filters, 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 consumer audio
applications, such as DVD/BD, AV receiver, Home theater systems and set-top boxes. The AK4440 is
offered in a space saving 30pin VSOP package.
MS1088-E-01
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)
24Bit 8 times FIR Digital Filter with Slow roll-off option
Switched-Capacitor Filter with High Tolerance to Clock Jitter
Single Ended 2Vrms Output Buffer
Digital De-emphasis Filter: 32kHz, 44.1kHz or 48kHz
Soft mute
Control I/F: 3-wire Serial and I
Audio I/F format: MSB justified, LSB justified (16bit, 20bit, 24bit), I
Master clock: 256fs, 384fs, 512fs or 768fs or 1152fs (Normal Speed Mode)
THD+N: -93dB
Dynamic Range: 105dB
Automatic Power-on Reset Circuit
Power Supply: +4.5 to +5.5V
Ta = -20 to 85°C
Small Package: 30 pin VSOP (9.7mm x 7.6mm)
192kHz 24-Bit 8ch DAC with 2Vrms Output
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs or 192fs (Quad Speed Mode)
GENERAL DESCRIPTION
FEATURES
2
C Bus
- 1 -
AK4440
2
S, TDM
[AK4440]
2011/03

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AK4440 Summary of contents

Page 1

... DAC with 2Vrms Output The AK4440 24-bit 8ch DAC with an integrated 2Vrms output buffer. A charge pump in the buffer develops an internal negative power supply rail that enables a ground-referenced 2Vrms output. Using AKM’s multi bit modulator architecture, the AK4440 delivers a wide dynamic range while preserving linearity for improved THD+N performance ...

Page 2

... SCF DAC LPF SCF DAC LPF SCF DAC LPF SCF DAC LPF SCF DAC Charge Pump CN CP VEE VSS2 VDD VSS1 1μ 1μ Block Diagram - 2 - [AK4440] MCLK LRCK BICK SDTI1 SDTI2 SDTI3 SDTI4 Control 3-wire Register AK4440 AVDD 2011/03 ...

Page 3

... Ordering Guide -20 ∼ +85°C AK4440EF AKD4440 Evaluation Board for AK4440 ■ Pin Layout MCLK BICK SDTI1 LRCK TEST SMUTE/CSN/CAD0 ACKS/CCLK/SCL DIF0/CDTI/SDA SDTI2 SDTI3 SDTI4 TDM0B DEM0 I2C/DEM1 P/S MS1088-E-01 30pin VSOP AK4440 Top 7 View ...

Page 4

... CP pin. Non polarity capacitors can also be used. MS1088-E-01 PIN/FUNCTION “H”: Enable, “L”: Disable 2 C mode “H”: Auto Setting Mode 2 C mode 2 C mode 2 C Bus (Internal pull-up pin, typ 100kΩ [AK4440] 2011/03 ...

Page 5

... PIN/FUNCTION (Continued) Setting Leave open. Connect to VSS2. Connect to VDD or VSS2. Leave open. ABSOLUTE MAXIMUM RATINGS Symbol min VDD -0.3 AVDD -0.3 IIN VIND -0.3 Ta -20 Tstg -65 Symbol min VDD +4.5 AVDD - 5 - [AK4440] max +6.0 +6.0 - ±10 VDD+0.3 85 150 typ max +5.0 +5.5 VDD Units °C °C Units V 2011/03 ...

Page 6

... Note 9. The current into VDD and AVDD. Note 10. The P/S pin is tied to VDD and the all other digital inputs including clock pins (MCLK, BICK and LRCK) are tied to VSS2. MS1088-E-01 ANALOG CHARACTERISTICS min Note -60 1. [AK4440] typ max Units 24 Bits -93 - ...

Page 7

... (Note 13 (Note 12 fs=44.kHz FR - fs=96kHz FR - fs=192kHz CHARACTERISTICS Symbol min VIH 2.2 VIL - VOL - 14) Iin - - 7 - [AK4440] typ max Units 20.0 kHz 22.05 - kHz kHz ± 0. 19.3 - 1/fs ±0. ±0. ±0.05 typ max Units 8.1 kHz 18.2 - kHz kHz ± 0.005 dB dB 19.3 - 1/fs +0 ...

Page 8

... [AK4440] min typ max Units 2.048 36.864 MHz kHz 60 96 kHz 120 192 kHz kHz 1/256fs ...

Page 9

... BICK LRCK tBLR BICK SDTI MS1088-E-01 1/fCLK tCLKH tCLKL 1/fs tBCK tBCKH tBCKL Figure 1. Clock Timing tLRB tSDS tSDH Figure 2. Audio Serial Interface Timing - 9 - [AK4440] VIH VIL dCLK=tCLKH x fCLK, tCLKL x fCLK VIH VIL VIH VIL VIH VIL VIH VIL VIH VIL 2011/03 ...

Page 10

... C1 C0 R/W Figure 3. WRITE Command Input Timing D2 D1 Figure 4. WRITE Data Input Timing tR tHIGH tF tHD:DAT tSU:DAT tSU:STA Start 2 Figure Bus mode Timing - 10 - [AK4440] VIH VIL VIH VIL VIH A4 VIL tCSW VIH VIL tCSH VIH VIL VIH D0 VIL VIH VIL tSP ...

Page 11

... DFS1-0 bits. In parallel control mode, the sampling speed can be set by only the ACKS pin. When ACKS pin = “L”, the AK4440 operates by Normal Speed Mode. When ACKS pin = “H”, auto setting mode is enabled. The parallel control mode does not support 128fs and 192fs of double speed mode ...

Page 12

... Table 5. Sampling Speed (Auto Setting Mode) MCLK (MHz) 256fs 384fs 512fs - - 16.3840 - - 22.5792 - - 24.5760 22.5792 33.8688 24.5760 36.8640 - - - - - 12 - BICK 384fs 64fs 33.8688MHz 5.6448MHz 36.8640MHz 6.1440MHz BICK 64fs 11.2896MHz 12.2880MHz Sampling 768fs 1152fs 24.5760 36.8640 Normal 33.8688 - 36.8640 - - - - Double - - - - - - - - - [AK4440] Speed Quad 2011/03 ...

Page 13

... Figure 10 ↓ 256fs Figure 11 LRCK BICK ≥32fs H/L ≥40fs H/L ≥48fs H/L ≥48fs S Compatible L/H ≥48fs H/L ↑ 256fs ↓ S Compatible 256fs ↑ 256fs ↑ 128fs ↓ S Compatible 128fs ↑ 128fs [AK4440] can Figure Figure 6 Figure 7 Figure 8 Figure 9 Figure 7 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 2011/03 ...

Page 14

... Figure 8. Mode 2 Timing - Rch Data Rch Data Don’t care Rch Data [AK4440 2011/03 ...

Page 15

... Don’t care Rch Data BICK 32 BICK 32 BICK BICK 32 BICK 32 BICK BICK 32 BICK 32 BICK [AK4440 2011/03 ...

Page 16

... BICK 32 BICK Figure 14. Mode 9 Timing 128 BICK BICK 32 BICK BICK 32 BICK Figure 15. Mode 10 Timing - 16 - [AK4440 BICK BICK BICK ...

Page 17

... Analog Output Block The internal negative power supply generation circuit 2Vrms amplifier. It allows the AK4440 to output an audio signal centered at VSS (0V, typ) as shown in negative power generation circuit (Figure If this capacitor is polarized, the positive polarity pin should be connected to the CP and VSS2 pins. This circuit operates by clocks generated from MCLK ...

Page 18

... If soft mute is cancelled before attenuating to - ∞ , the attenuation is discontinued and returned to ATT level in the same cycle. MS1088-E-01 DEM0 pin Mode L L 44.1kHz L H OFF H L 48kHz H H 32kHz 1024/fs (1) GD (2) (4) 8192/fs Figure 18. Soft Mute Function - 18 - [AK4440] (default) 1024/fs (3) GD 2011/03 ...

Page 19

... MUTE (D/A Out) Notes: (1) The AK4440 includes an internal Power on Reset Circuit which is used reset the digital logic into a default state after power up. Therefore, the power supply voltage must reach 80% VDD from 0.3V in less than 20msec. (2) Register writings are valid after 10ms (max). ...

Page 20

... Reset Function When the MCLK, LRCK or BICK stops, the AK4440 is placed in reset mode and its analog outputs are set to VSS (0V, typ). When the MCLK, LRCK and BICK are restarted, the AK4440 returns to normal operation mode. Clock In MCLK, BICK, LRCK Internal ...

Page 21

... Chip Address (2bits, C1/0; fixed to “11”), Read/Write (1bit; fixed to “1”, Write only), Register Address (MSB first, 5bits) and Control Data (MSB first, 8bits). The AK4440 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 the rising edge of CSN. The clock speed of CCLK is 5MHz (max) ...

Page 22

... CAD0 (device address bit). The bit identifies the specific device on the bus. The hard-wired input pin (CAD0 pin) set them. If the slave address match that of the AK4440 and R/W bit is “0”, the AK4440 generates an acknowledge and the write operation is executed. If R/W bit is “1”, the AK4440 does not answer any acknowledge The second byte consists of the address for control registers of the AK4440 ...

Page 23

... MASTER S START CONDITION SDA SCL MS1088-E-01 Figure 26. START and STOP conditions Figure 27. Acknowledge on the I data line change stable; of data data valid allowed 2 Figure 28. Bit transfer on the I C-bus - stop condition not acknowledge acknowledge 8 clock pulse for acknowledgement C-bus [AK4440] 9 2011/03 ...

Page 24

... SLOW DFS1 (Table 9, Table 10) (Table DIF1 DIF0 0 DFS0 DEM1 DEM0 PW4 PW3 PW2 DEMA DEMB DEMC DIF1 DIF0 Sampling Speed DFS0 DEM1 DEM0 [AK4440] D0 RSTN SMUTE PW1 DEMD D0 RSTN 1 D0 SMUTE 0 2011/03 ...

Page 25

... DEM Control Default DEMA-D: De-emphasis Enable bit of DAC1/2/3/4 0: Disable 1: Enable MS1088-E- [AK4440 PW4 PW3 PW2 PW1 DEMA DEMB DEMC DEMD 2011/03 ...

Page 26

... SDTI2 ROUT2 10 LOUT3 21 SDTI3 11 ROUT3 20 SDTI4 12 LOUT4 19 TDM0B 18 13 ROUT4 DEM0 VSS1 17 14 DEM1 AVDD [AK4440] 0.1u 10u Analog (1) 1u (1) L1ch Out R1ch Out L2ch Out R2ch Out L3ch Out R3ch Out L4ch Out R4ch Out + Analog 5V 0.1u 10u 2011/03 ...

Page 27

... ROUT2 22 10 SDTI3 LOUT3 21 11 SDTI4 20 ROUT3 12 TDM0B LOUT4 19 13 DEM0 ROUT4 18 14 VSS1 17 I2C 15 P/S 16 AVDD - 27 - [AK4440] 0.1u 10u Analog (1) 1u (1) L1ch Out R1ch Out L2ch Out R2ch Out L3ch Out R3ch Out L4ch Out R4ch Out + Analog 5V 0.1u 10u 2011/03 ...

Page 28

... The ideal output is 0V (VSS) voltage for 000000H (@24bit data). The DC offset is ±60mV or less. AK4440 AOUT (fc = 86.1kHz, gain = -0.85dB @ 40kHz, gain = -2.70dB @ 80kHz) Figure 31. External 1 MS1088-E-01 560 Analog Out 2.12Vrms (typ) 3.3nF st order LPF Circuit Example1 - 28 - [AK4440] st -order LPF (Figure 31) 2011/03 ...

Page 29

... Lead frame material: Lead frame surface treatment: RoHS Compliance *All integrated circuits form Asahi Kasei Microdevices Corporation (AKM) assembled in “lead-free” packages are fully compliant with RoHS. MS1088-E-01 PACKAGE 16 15 0.65 Detail A 0.08 Epoxy, Halogen (bromine and chlorine) free Cu Solder (Pb free) plate - 29 - [AK4440] 1.5MAX A +0.10 0.15 -0.05 2011/03 ...

Page 30

... XXXB: Lot number (X: Digit number, B: Alpha character) YYYYC: Assembly date (Y: Digit number, C: Alpha character) Date (YY/MM/DD) Revision 09/10/15 00 11/03/01 01 MS1088-E-01 MARKING AKM AK4440EF XXXBYYYYC XXXBYYYYC Date code identifier REVISION HISTORY Reason Page Contents First Edition Error Correction 28 1. Grounding and Power Supply Decoupling The description was changed [AK4440] 2011/03 ...

Page 31

... AKM harmless from any and all claims arising from the use of said product in the absence of such notification. MS1088-E-01 IMPORTANT NOTICE , and AKM assumes no responsibility for such use, except for the use Note2 [AK4440] in any safety, life support, or Note1) 2011/03 ...

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