AK5371VQ Asahi Kasei Microsystems, AK5371VQ Datasheet

Page 1

ASAHI KASEI AK5371 Features: USB-IF Certified Incorporates USB Audio Controller USB Serial Interface Engine Audio Class Encoder/Decoder 2 Endpoints (FIFO) USB transceiver 16 bit A/D Converter 2 channels Mute/Volume Control A/D S/N: 84dBA (44.1kHz, Gain = 0dB) Low Power Dissipation ...

Page 2

... ASAHI KASEI Block Diagram BGND BIASSEL MICBIAS MICR 20dB - + AMPR1O AMPR2I - MICL + 20dB - + AMPL1O AMPL2I - + AMPL2O Ordering Guide AK5371VQ 0 +70 C AKD5371 Evaluation Board Pin Layout DGND BGND NC TESTMODE3 5 XTALOUT XTALIN TESTMODE2 LFLT1 LFLT2 10 BIASSEL NC 15 MS0103-E-00 MS0103-E-00 AGND VD DGND SUSN ...

Page 3

ASAHI KASEI No. Signal Name I DGND P 3 BGND TESTMODE3 I 6 XTALOUT O 7 XTALIN I 8 TESTMODE2 I 9 LFLT1 O 10 LFLT2 O 11 BIASSEL I 12 ...

Page 4

ASAHI KASEI No. Signal Name I AGND P 28 VREF TESTMODE1 TEST I EPAO ...

Page 5

ASAHI KASEI AGND, DGND=0V Parameter Power Supplies |DGND-AGND| Input Current (any pins except for supplies) Analog Input Voltage Digital Input Voltage Ambient Temperature Storage Temperature Note 1. All voltages with respect to ground Warning: Operation at or beyond these limits ...

Page 6

ASAHI KASEI Ta=25 C,VA=VD=3.3V, Signal Frequency=1kHz, Sampling Frequency Fs=44.1kHz BW=20Hz – 20kHz, Test Mode; unless otherwise specified Parameter Stereo ADC (2 channel) Resolution S/N (A weight) ( AMPR2I/AMPL2I input) (IPGA are set to 0dB) S/(N+D) (-1dB analog input) (IPGA are ...

Page 7

ASAHI KASEI Ta VD=3.0 - 3.6V; DGND=0V Measurement under static state All digital pins except DP, DN. Schmitt hysteresis level of RST pin and levels of all test pins will not be tested Parameter EPDI, EPEN, EPSEL, ...

Page 8

ASAHI KASEI VD”H” RST”H” PLL Clock Figure 2. Mode Change with respect to Bus States 2 (Bus transactions) Ta=25 C; VD=3.3V; DGND=0V; CL=50pF Parameter Symbol Data Rate Output Impedance (Hi) Roh Output Impedance (Lo) “H” level Output Voltage ...

Page 9

ASAHI KASEI Ta=25 C; VD=3.3V; DGND=0V Parameter Symbol Common Mode Range CMR Differential Input Sensitivity DIS Schmitt High Level Voltage Vihs Schmitt Low Level Voltage Vils DP, DN MS0103-E-00 MS0103-E-00 Receiver Characteristics Pins Conditions Min DP, DN 0.8 DP, DN ...

Page 10

ASAHI KASEI Overview of AK5371 The AK5371 is the advanced stereo A/D converter, which converts analog signal into USB audio class formats. As the AK5371 incorporates all functions to build USB Audio Input Device, the AK5371 doesn’t require additional micro-controller, ...

Page 11

ASAHI KASEI Descriptor Overview When the device is connected to USB bus, the host assigns specific address to the device. Then the host reads the device information, which is called as descriptor, through default pipe (Endpoint 0). The AK5371 consists ...

Page 12

ASAHI KASEI Audio Format of the AK5371 The AK5371 supports two audio formats: 16bit/mono and 16bit/stereo. This feature can avoid the unnecessary occupation of USB bandwidth. 16bit/mono is assigned to <Interlace 1, Alt1>, 16bit/stereo is assigned to <Interface 1, Alt2>. ...

Page 13

ASAHI KASEI EEPROM I/F The AK5371 has EEPROM I/F for customizing Device Descriptor, and String Descriptor. idVendor(2byte), idProduct(2byte), bcdDevice(2byte), iManufacturer(1byte), iProduct(1byte) in Device Descriptor and related String Descriptor can be customized. TM type, 1K bit, 2K bit bit ...

Page 14

ASAHI KASEI System Block Diagram The following figure shows the system connection diagram. This is an example which uses external 1K bit EEPROM (AK93C45A) as Device and String Descriptor. If EEPROM is not used, EPEN pin should be tied to ...

Page 15

ASAHI KASEI AK5371 Descriptors Specification 1 Device descriptor Offset Field Size 0 bLength 1 1 bDescriptorType 1 2 bcdUSB 2 4 bDeviceClass 1 5 bDeviceSubClass 1 6 bDeviceProtocol 1 7 bMaxPacketSize0 1 8 idVendor 2 10 idProduct 2 12 bcdDevice ...

Page 16

ASAHI KASEI 3.2 Class-specific Audio Control Interface 3.3 Class-specific Audio Control Interface Header Descriptor 3.3.1 Contains general information about the audio device. Offset Field Size 0 bLength 1 bDescriptorType 2 bDescriptorSubtype 3 bcdADC 5 wTotalLength 7 bInCollection 8 baInterfaceNr(1) 3.3.2 ...

Page 17

ASAHI KASEI 3.4 Audio streaming interface 3.4.1 Zero bandwidth interface descriptor Offset Field Size 0 bLength 1 bDescriptorType 2 bInterfaceNumber 3 bAlternateSetting 4 bNumEndpoints 5 bInterfaceClass 6 bInterfaceSubclass 7 bInterfaceProtocol 8 iInterface 3.4.2 Interface descriptor ( Alt = 1, 16bit ...

Page 18

ASAHI KASEI 3.5 Endpoint descriptor 3.5.1 Standard Endpoint Descriptor Offset Field Size 0 bLength 1 bDescriptorType 2 bendpointAddress 3 bmAttributes 4 wMaxPacketSize 6 wInterval 7 bRefresh 8 bSynchAddress 3.5.2 Class-specific isochronous audio data endpoint descriptor Offset Field Size 0 bLength ...

Page 19

ASAHI KASEI 3.5.3 Interface descriptor (Alt = 2, 16bit Stereo) Offset Field Size 0 bLength 1 bDescriptorType 2 bInterfaceNumber 3 bAlternateSetting 4 bNumEndpoints 5 bInterfaceClass 6 bInterfaceSubclass 7 bInterfaceProtocol 8 iInterface 3.5.4 Class-specific audio streaming interface descriptor Offset Field Size ...

Page 20

ASAHI KASEI 3.6 Endpoint descriptor 3.6.1 Standard Endpoint Descriptor Offset Field Size 0 bLength 1 bDescriptorType 2 bendpointAddress 3 bmAttributes 4 wMaxPacketSize 6 wInterval 7 bRefresh 8 bSynchAddress 3.6.2 Class-specific isochronous audio data endpoint descriptor Offset Field Size 0 bLength ...

Page 21

ASAHI KASEI 3.7 String descriptor 1 String descriptors use UNICODE. except for LANGID. 3.7.1 LANGID ( 0 x00) Field Offset Field Size 0 bLength 1 bDescriptorType 2 bString 3.7.2 iManufacterer ( 0x01) Field in Device Descriptor Offset Field Size 0 ...

Page 22

ASAHI KASEI 3.7.3 iProduct (0x02) Field in Device Descriptor Offset Field Size 0 bLength 1 bDescriptorType 2 bString MS0103-E-00 MS0103-E-00 Value Description 1 0x34 Length of this descriptor 1 0x03 STRING descriptor 50 0x0041 “AK5371 0x004B 0x0035 0x0033 0x0037 0x0031 ...

Page 23

ASAHI KASEI 4 Standard requests 4.1 Clear Feature The AK5371 accepts “Clear Feature” request without stall. Though this request does not influence to the operation of the device, the AK5371 does not support this request. 4.2 Get Configuration The AK5371 ...

Page 24

ASAHI KASEI 4.5 Get Status Offset Field Size 0 bmRequestType 1 1 bRequest 1 2 wValue 2 4 wIndex 2 6 wLength 2 The AKM USB MIC returns the following status. a) Device : 0x00 ( AKM USB MIC is ...

Page 25

ASAHI KASEI 4.8 Set Feature The AK5371 accepts “Set Feature” request without stall. However note that the AK5371 does not support this request. 4.9 Set Interface Audio format can be changed by the combination of Interface Number and Alternate Setting. ...

Page 26

ASAHI KASEI 5 Device specific Requests AKM USB Microphone supports ONLY SET_CUR as bRequest field in Set Request Values. 5.1 Audio Control Request AKM USB microphone support ONLY Feature Unit Control Request, not support other requests. Addition to this, it ...

Page 27

ASAHI KASEI 5.1.2 Get Feature Unit Control Request AKM USB Microphone supports only one form of parameter block. a) Mute Control Offset Field Size 0 bmRequestType 1 1 bRequest 1 2 wValue 2 4 wIndex 2 6 wLength 2 The ...

Page 28

ASAHI KASEI Field wVolume 0x7FFF -------- 0x1800 0x17FF --------- 0x1701 0x1700 0x16FF --------- 0x1201 0x1200 --------- --------- 0x02FF --------- 0x0201 0x0200 0x01FF --------- 0x0101 0x0100 0x00FF --------- 0x0001 0x0000 0xFFFF -------- 0xFF01 0xFF00 0xFEFF -------- 0xFE01 0xFE00 --------- --------- 0xE200 ...

Page 29

ASAHI KASEI 5.2 Endpoint Control Request The AK5371 supports five sampling frequencies. The sampling rate is changed when “Set Endpoint Control Request ” is issued. SET_CUR, GET_CUR of bRequest is only supported. GET_MIN, GET_ MAX, and GET_RES of bRequest are ...

Page 30

ASAHI KASEI 48pin LQFP(Unit:mm 0.5 MS0103-E-00 MS0103-E-00 Package 1.70Max 9.0 0.2 7.0 1.4TYP 0.19 0.05 0. 0.10 0.5 0.2 30 [AK5371] 0.10 0.07 0.17 0.05 2001/06 ...

Page 31

... ASAHI KASEI MS0103-E-00 MS0103-E-00 Marking AK5371VQ XXXXXXX 1 1) Pin #1 indication 2) Date Code: XXXXXXX (7 digits) 3) Marking Code: AK5371VQ 4) Asahi Kasei Logo 31 [AK5371] 2001/06 ...

Page 32

... ASAHI KASEI These products and their specifications are subject to change without notice. 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 ...