PDF AK4137 Data sheet ( Hoja de datos )

Número de pieza	AK4137
Descripción	32bit SRC
Fabricantes	AKM
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No Preview Available ! [AK4137] = Preliminary = AK4137 32bit SRC with PCM/DSD conversion 1. General Description The AK4137 is a 2ch digital sample rate converter (SRC). The input sample rate ranges from 8kHz to 768kHz. The output sample rate is from 8kHz to 768kHz. The AK4137 has an internal Oscillator. Therefor it does not need any external master clocks and simplifies a system configuration. The AK4137 is suitable for the application interfacing to different sample rates such as high-end Audio Systems and USB-DACs. It is capable of play backing various audio formats with PCM-DSD data conversion function. 2. Features  2 channels input/output  Asynchronous Sample Rate Converter  PCM Input Sample Rate Range(FSI): 8kHz~768kHz Output Sample Rate Range(FSO): 8kHz~768kHz  DSD Input Sample Rate Range(FSI): 2.8224MHz~11.2896MHz Output Sample Rate Range(FSO): 2.8224MHz~11.2896MHz  Input to Output Sample Rate Ratio: FSO/FSI = 1/6 ~ 24  THD+N: Up to −150dB  Dynamic Range: 188dB (A-weighted)  I/F format: MSB justified, LSB justified, I2S compatible and TDM  PCM/DSD converter  Dop I/F  Oscillator for Internal Operation Clock  Clock for Master mode: 64/128/192/256/384/512/768fso  On-chip X’tal oscillator  Digital De-emphasis Filter (32KHz, 44.1KHz, 48KHz)  Soft Mute Function  SRC Bypass mode (Master/Slave, PCM, DSD)  uP Interface: I2C bus/SPI 4wires  Power Supply DVDD: 3.0~3.6V DVDD: 1.7~1.9V (LDO OFF mode)  Operating Temperature: Ta= −40 ~ +105°C  Package AK4137: 48-pin LQFP (0.5mm pitch) Rev. 0.2 2014/06 -1- 1 page [AK4137] ■ Pin Functions No. Pin Name I/O Function DSDIL 1 DEM0 I DSD Data Pin in DSD Mode I De-emphasis Control #0 Pin DSDIR 2 DEM1 I DSD Data Pin in DSD Mode I De-emphasis Control #1 Pin 3 IDCLK I DSD Clock Pin in DSD Mode 4 ILRCK I L/R Clock Pin in PCM Mode 5 IBICK I Audio Serial Data Clock Pin in PCM Mode 6 SDTI I Audio Serial Data Input Pin in PCM Mode CAD0 7 IDIF0 I Chip Address 0 Pin in Serial Control Mode I Digital Input Format 0 Pin in Parallel Control Mode CAD1 8 IDIF1 I Chip Address 1 Pin in Serial Control Mode I Digital Input Format 1 Pin in Parallel Control Mode IDIF2 9 TDO0 I Digital Input Format 2 Pin in Parallel Control Mode O Test Output pin 10 SRCE_N O Unlock Status Pin When the PDN pin= “L”, this pin outputs “H”. 11 TEST0 I Test pin 0. Must be connected to DVSS in normal use. 12 TEST1 I Test pin 1. Must be connected to DVSS in normal use. 13 I2C I Select serial mode “L”: 4wire serial Mode ,“H”: I2C Mode 14 PDN Power-Down Mode Pin “H”: Power up, I “L”: Power down reset and initializes the control register. The AK4137 should be reset once by bringing PDN pin = “L” upon power-up. 15 PSN I Parallel /Serial Mode Select. High equals parallel mode. “L”: Serial Mode , “H”: Parallel Mode Note 1. All input pins must not be allowed to float. DVDD must be connected to the same power supply. Note 2. S_PB, CM3-0, OBOT1-0, TDM, ODIF1-0, IDIF2-0 and CAD1-0 pin must be changed when the PDN pin =”L”. Rev. 0.2 2014/06 -5- 5 Page [AK4137] ■ Internal LDO Mode 9. Power Consumptions (Ta=-40 +105C; DVDD=3.03.6V) Parameter Symbol Power Supply Current Normal operation: （PDN =”H”） FSI=FSO=48kHz at Slave Mode : DVDD=3.3V FSI=FSO=192kHz at Slave Mode: DVDD=3.3V FSI=FSO=768kHz at Slave Mode: DVDD=3.3V : DVDD=3.6V Power down: PDN = “L” (Note 9) DVDD=3.6V Note 9. All digital inputs including clock pins are held to DVSS. Min. Typ. 60 65 10 Max. Unit - - TBD 100 mA mA mA mA A ■ DV18 External Supply Mode (Ta=-40 +105C; DVDD=DV18=1.71.9V) Parameter Symbol Power Supply Current Normal operation: FSI=FSO=48kHz at Slave Mode: DVDD＝DV18=1.8V FSI=FSO=192kHz at Slave Mode: DVDD＝DV18=1.8V FSI=FSO=768kHz at Slave Mode: DVDD＝DV18=1.8V : DVDD＝DV18=1.9V Power down: PDN = “L” (Note 9) DVDD=DV18=1.9V Note 9. All digital inputs including clock pins are held to DVSS. Min. Typ. Max. Unit mA - mA 60 - mA 65 TBD mA 10 100 A Rev. 0.2 - 11 - 2014/06 11 Page

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