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USB Interface

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PCM2706, PCM2707

SLES081F – JUNE 2003 – REVISED JANUARY 2009

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www.ti.com

Control data and audio data are transferred to the PCM2704/5/6/7 via D+ (pin 9 for PCM2704/5, pin 23 for
PCM2706/7) and D– (pin 8 for PCM2704/5, pin 22 for PCM2706/7). D+ should be pulled up with a 1.5-k

Ω

(±5%)

resistor. To avoid back voltage in self-powered operation, the device must not provide power to the pullup
resistor on D+ while V

BUS

of the USB port is inactive.

All data to/from the PCM2704/5/6/7 are transferred at full speed. The following information is provided in the
device descriptor. Some parts of the device descriptor can be modified through external ROM (PCM2704/6), SPI
(PCM2705/7), or internal mask ROM on request.

Table 3. Device Descriptor

DEVICE DESCRIPTOR

DESCRIPTION

USB revision

1.1 compliant

Device class

0x00 (device defined interface level)

Device subclass

0x00 (not specified)

Device protocol

0x00 (not specified)

Max packet size for endpoint 0

8 bytes

Vendor ID

0x08BB (default value, can be modified)

0x2704/0x2705/0x2706/0x2707 (These values correspond to the model number, and the value can be

Product ID

modified.)

Device release number

1.0 (0x0100)

Number of configurations

1

Vendor strings

Burr-Brown from TI (default value, can be modified)

Product strings

USB Audio DAC (default value, can be modified)

Serial number

Not supported

The following information is contained in the configuration descriptor. Some parts of the configuration descriptor
can be modified through external ROM (PCM2704/6), SPI (PCM2705/7), or internal mask ROM on request.

Table 4. Configuration Descriptor

CONFIGURATION DESCRIPTOR

DESCRIPTION

Interface

Three interfaces

0x80 or 0xC0 (bus-powered or self-powered, depending on PSEL; no remote wake up. This value can

Power attribute

be modified.)

0x0A, 0x32 or 0xFA (20 mA for self-powered, 100 mA or 500 mA for bus-powered, depending on

Max power

PSEL and HOST. This value can be modified.)

The following information is contained in the string descriptor. Some parts of the string descriptor can be modified
through external ROM (PCM2704/6), SPI (PCM2705/7), or internal mask ROM on request.

Table 5. String Descriptor

STRING DESCRIPTOR

DESCRIPTION

#0

0x0409

#1

Burr-Brown from TI (default value, can be modified)

#2

USB Audio DAC (default value, can be modified)

16

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Copyright © 2003–2009, Texas Instruments Incorporated

Product Folder Link(s):

PCM2704 PCM2705 PCM2706 PCM2707

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Содержание PCM2704

Страница 1: ...I PCM2705 7 or on request 1 Self Powered The PCM2704 5 6 7 employs SpAct architecture TI s unique system that recovers the audio clock from THD N 0 025 RL 32 Ω USB packet data On chip analog PLLs with SpAct SNR 98 dB enable playback with low clock jitter Dynamic Range 98 dB PO 12 mW RL 32 Ω Oversampling Digital Filter Pass Band Ripple 0 04 dB Stop Band Attenuation 50 dB Single Ended Voltage Output...

Страница 2: ...NC3 VCOM 0 3 V to VCCP 0 3 V 4 V Analog input voltage VOUTR 0 3 V to VCCR 0 3 V 4 V VOUTL 0 3 V to VCCL 0 3 V 4 V Input current any pins except supplies 10 mA Ambient temperature under bias 40 C to 125 C Storage temperature 55 C to 150 C Junction temperature 150 C Lead temperature soldering 260 C 5 s Package temperature IR reflow peak 260 C 1 Stresses beyond those listed under Absolute Maximum Rat...

Страница 3: ... Bits Audio data channel 1 2 Channel DC ACCURACY Gain mismatch channel to channel 2 8 of FSR Gain error 2 8 of FSR Bipolar zero error 3 6 of FSR DYNAMIC PERFORMANCE 4 RL 10 kΩ self powered 0 006 0 01 VOUT 0 dB Line 5 Total harmonic RL 10 kΩ bus powered THD N 0 012 0 02 distortion noise VOUT 0 dB RL 32 Ω self Headphone 0 025 bus powered VOUT 0 dB THD N Total harmonic distortion noise VOUT 60 dB 2 D...

Страница 4: ... VCCP VCCL VCCR Self powered 3 3 3 3 6 VDD Line DAC operation 23 30 mA Supply current Headphone DAC operation RL 32 Ω 35 46 Line headphone Suspend mode 6 150 190 µA Line DAC operation 76 108 mW Power dissipation Headphone DAC operation RL 32 Ω 116 166 self powered Line headphone Suspend mode 6 495 684 µW Line DAC operation 115 158 mW Power dissipation Headphone DAC operation RL 32 Ω 175 242 bus po...

Страница 5: ...AGE TOP VIEW 23 22 21 20 19 1 2 25 26 27 28 29 30 31 32 16 15 14 13 12 11 10 9 PSEL DT CK XTO XTI SSPND TEST FSEL ZGND AGNDL VCCL VOUTL VOUTR VCCR AGNDR VCOM 24 18 3 4 5 6 7 8 17 V BUS D D V DD DGND FUNC1 FUNC2 DOUT PGND V CCP HOST FUNC3 FUNC0 HID0 MS HID1 MC HID2 MD P0020 01 PCM2704 PCM2705 PCM2706 PCM2707 www ti com SLES081F JUNE 2003 REVISED JANUARY 2009 Copyright 2003 2009 Texas Instruments In...

Страница 6: ... 100 mA HIGH 500 mA 3 PGND 19 Analog ground for DAC OSC and PLL PSEL 4 I Power source select LOW self power HIGH bus power 1 SSPND 27 O Suspend flag active LOW LOW suspend HIGH operational TEST0 26 I Test pin Must be set HIGH 1 TEST1 25 I Test pin Must be set HIGH 1 VBUS 10 Connect to USB power VBUS for bus powered operation Connect to VDD for self powered operation VCCL 13 Analog power supply for...

Страница 7: ...e up active HIGH PCM2706 MC input PCM2707 2 HID2 MD 8 I HID key state input volume down active HIGH PCM2706 MD input PCM2707 2 HOST 3 I Host detection during self powered operation connect to VBUS Max power select during bus powered operation LOW 100 mA HIGH 500 mA 3 PGND 1 Analog ground for DAC OSC and PLL PSEL 16 I Power source select LOW self power HIGH bus power 1 SSPND 11 O Suspend flag activ...

Страница 8: ...int ISO Out Endpoint HID Endpoint VBUS USB SIE D D XCVR DT HOST HID0 MS HID1 MC HID2 MD CK VOUTR DOUT PSEL TEST0 TEST1 SPI Interface 2 B0054 01 PCM2704 PCM2705 PCM2706 PCM2707 SLES081F JUNE 2003 REVISED JANUARY 2009 www ti com BLOCK DIAGRAM PCM2704DB PCM2705DB 1 Applies to PCM2704DB 2 Applies to PCM2705DB 8 Submit Documentation Feedback Copyright 2003 2009 Texas Instruments Incorporated Product Fo...

Страница 9: ...2 MD CK VOUTR FUNC1 DOUT FUNC3 I2S I F PSEL TEST EEPROM Interface 1 SPI Interface 2 FUNC2 FUNC0 FSEL BCK DIN SYSCK LRCK DOUT HID3 Next Track 1 HID4 Previous Track 1 HID5 Stop 1 HID6 Play Pause 1 B0055 01 PCM2704 PCM2705 PCM2706 PCM2707 www ti com SLES081F JUNE 2003 REVISED JANUARY 2009 BLOCK DIAGRAM PCM2706PJT PCM2707PJT 1 Applies to PCM2706PJT 2 Applies to PCM2707PJT Copyright 2003 2009 Texas Ins...

Страница 10: ... 80 60 40 20 0 f Frequency kHz Amplitude dB 1 100 1k 10k 10 G004 PCM2704 PCM2705 PCM2706 PCM2707 SLES081F JUNE 2003 REVISED JANUARY 2009 www ti com All specifications at TA 25 C VBUS 5 V fS 44 1 kHz fIN 1 kHz 16 bit data unless otherwise noted AMPLITUDE AMPLITUDE vs vs FREQUENCY FREQUENCY Figure 1 Frequency Response Figure 2 Pass Band Ripple AMPLITUDE AMPLITUDE vs vs FREQUENCY FREQUENCY Figure 3 P...

Страница 11: ... 04 0 05 3 0 3 1 3 2 3 3 3 4 3 5 3 6 VCC Supply Voltage V THD N Total Harmonic Distortion Noise 32 Ω 10 kΩ Self Powered VOUT 0 dB G008 PCM2704 PCM2705 PCM2706 PCM2707 www ti com SLES081F JUNE 2003 REVISED JANUARY 2009 All specifications at TA 25 C VBUS 5 V fS 44 1 kHz fIN 1 kHz 16 bit data unless otherwise noted TOTAL HARMONIC DISTORTION NOISE TOTAL HARMONIC DISTORTION NOISE vs vs FREE AIR TEMPERA...

Страница 12: ...e Air Temperature C Dynamic Range and SNR dB Self Powered Dynamic Range SNR G012 PCM2704 PCM2705 PCM2706 PCM2707 SLES081F JUNE 2003 REVISED JANUARY 2009 www ti com TYPICAL PERFORMANCE CURVES continued All specifications at TA 25 C VBUS 5 V fS 44 1 kHz fIN 1 kHz 16 bit data unless otherwise noted TOTAL HARMONIC DISTORTION NOISE TOTAL HARMONIC DISTORTION NOISE vs vs SAMPLING FREQUENCY SAMPLING FREQU...

Страница 13: ...uency kHz Dynamic Range and SNR dB Dynamic Range Self Powered G016 PCM2704 PCM2705 PCM2706 PCM2707 www ti com SLES081F JUNE 2003 REVISED JANUARY 2009 TYPICAL PERFORMANCE CURVES continued All specifications at TA 25 C VBUS 5 V fS 44 1 kHz fIN 1 kHz 16 bit data unless otherwise noted DYNAMIC RANGE and SNR DYNAMIC RANGE and SNR vs vs SUPPLY VOLTAGE SUPPLY VOLTAGE Figure 13 Figure 14 DYNAMIC RANGE and...

Страница 14: ...PCM2707 SLES081F JUNE 2003 REVISED JANUARY 2009 www ti com TYPICAL PERFORMANCE CURVES continued All specifications at TA 25 C VBUS 5 V fS 44 1 kHz fIN 1 kHz 16 bit data unless otherwise noted SUSPEND CURRENT SUSPEND CURRENT vs vs SUPPLY VOLTAGE FREE AIR TEMPERATURE Figure 17 Figure 18 AMPLITUDE AMPLITUDE vs vs FREQUENCY FREQUENCY Figure 19 Output Spectrum 60 dB N 8192 Figure 20 Output Spectrum 60 ...

Страница 15: ...04 5 pin 24 for PCM2706 7 exceeding 3 V typical for bus powered applications Approximately 700 µs is required until internal reset release The PCM2704 5 6 7 has the following mode select pins PSEL pin 4 for PCM2704 5 pin 16 for PCM2706 7 is dedicated to selecting the power source This selection affects the configuration descriptor While in bus powered operation maximum power consumption from VBUS ...

Страница 16: ...be Product ID modified Device release number 1 0 0x0100 Number of configurations 1 Vendor strings Burr Brown from TI default value can be modified Product strings USB Audio DAC default value can be modified Serial number Not supported The following information is contained in the configuration descriptor Some parts of the configuration descriptor can be modified through external ROM PCM2704 6 SPI ...

Страница 17: ...ed as a USB stream terminal type 0x0101 Input terminal 1 can accept two channel audio streams constructed of left and right channels Output terminal 2 is defined as a speaker terminal type 0x0301 Feature unit 3 supports the following sound control features Volume control Mute control The built in digital volume controller can be manipulated by an audio class specific request from 0 dB to 64 dB in ...

Страница 18: ...e host Play Pause 0xCD Stop 0xB7 Previous 0xB6 Next 0xB5 Auxiliary HID Status Report PCM2705 7 One additional HID status can be reported to the host though the SPI port This status flag is defined by SPI command or external ROM This definition must be described as on the report descriptor with a three byte usage ID AL A V Capture 0x0193 is assigned as the default for this status flag The PCM2704 5...

Страница 19: ...Monaural data are converted to the stereo format at the same data rate S PDIF output is not supported in the I2 S I F enable mode The implementation of this feature is optional Note that it is your responsibility to determin whether to implement this feature in your product or not The channel status information is fixed as consumer application PCM mode copyright and digital digital converter All o...

Страница 20: ... BL LRCK delay time from BCK falling edge 20 40 ns t BD DOUT delay time from BCK falling edge 20 40 ns t LD DOUT delay time from LRCK edge 20 40 ns t DS DIN setup time 20 ns t DH DIN hold time 20 ns NOTE Load capacitance of LRCK BCK and DOUT is 20 pF Figure 23 Audio Interface Timing SYMBOL PARAMETER MIN MAX UNIT t SLL t SLH LRCK delay time from SYSCK rising edge 5 10 ns t SBL t SBH BCK delay time ...

Страница 21: ...external ROM descriptor Descriptor data is transferred from the external ROM to the PCM2704 6 through the I2 C interface the first time when the device activates after power on reset Before completing a read of the external ROM the PCM2704 6 replies with NACK for any USB command request from the host to the device itself The descriptor data which can be in external ROM are as follows String descri...

Страница 22: ...D Hold time for START repeated START condition 4 µs t RS HD t D SU Data setup time 250 ns t D HD Data hold time 0 900 ns t CK R Rise time of CK signal 20 0 1 CB 1000 ns t CK F Fall time of CK signal 20 0 1 CB 1000 ns t DT R Rise time of DT signal 20 0 1 CB 1000 ns t DT F Fall time of DT signal 20 0 1 CB 1000 ns t P SU Setup time for STOP condition 4 µs CB Capacitive load for DT and CK lines 400 pF...

Страница 23: ... 0x80 0x7D 0x0A 0x93 0x01 The data are stored beginning at address 0x00 Vendor ID 0x08BB Product ID 0x2704 Product string Product strings 16 bytes Vendor string Vendor strings are placed here 32 bytes 31 visible characters are followed by 1 space Power attribute bmAttribute 0x80 Bus powered Max power maxPower 0x7D 250 mA Auxiliary HID usage ID 0x0A 0x93 0x01 AL A V capture Note that the data bits ...

Страница 24: ...interface SPI to program the descriptor and to set the HID state Descriptor data are described in the SubSec1 8 8External ROM Descriptor section SYMBOL PARAMETER MIN TYP MAX UNIT t MCY MC pulse cycle time 100 ns t MCL MC low level time 50 ns t MCH MC high level time 50 ns t MHH MS high level time 100 ns t MLS MS falling edge to MC rising edge 20 ns t MLH MS hold time 20 ns t MDH MD hold time 15 ns...

Страница 25: ...th the actual application circuit configuration PSEL setting and actual power usage from VBUS of USB connector otherwise it may cause improper or unexpected PCM2705 7 operation ADDR Starts write operation for internal descriptor reprogramming active high This bit resets descriptor ROM address counter and indicates following words should be ROM data described in the External ROM Example section 456...

Страница 26: ...Y 2009 www ti com The PCM2704 5 6 7 is ready for setup when the reset sequence has finished and the USB bus is attached After a connection has been established by setup the PCM2704 5 6 7 is ready to accept USB audio data While waiting for the audio data idle state the analog output is set to bipolar zero BPZ When receiving the audio data the PCM2704 5 6 7 stores the first audio packet which contai...

Страница 27: ... the host finishes or aborts the playback the PCM2704 5 6 7 stops playing after completing the output of the last audio data Figure 30 Play Stop and Detach The PCM2704 5 6 7 enters the suspend state after the USB bus has been in a constant idle state for approximately 5 ms While the PCM2704 5 6 7 is in the suspend state SSPND flag pin 27 for PCM2704 5 pin 11 for PCM2706 7 is asserted The PCM2704 5...

Страница 28: ...ectrolytic capacitor depending on tradeoff between required frequency response and discharge time for resume C11 C12 0 022 µF ceramic capacitor C13 C14 1 µF electrolytic capacitor R1 1 MΩ resistor R2 R9 1 5 kΩ resistors R3 R4 22 Ω resistors R5 R6 16 Ω resistors R7 R8 330 Ω resistors depending on tradeoff between required THD performance and pop noise level for suspend 1 Output impedance of VOUTL a...

Страница 29: ... capacitance of crystal resonator C3 C5 C7 C8 1 µF ceramic capacitors C6 10 µF electrolytic capacitor C9 C10 100 µF electrolytic capacitors depending on required frequency response C11 C12 0 022 µF ceramic capacitors R1 1 MΩ resistor R2 R11 1 5 kΩ resistors R3 R4 22 Ω resistors R5 R6 16 Ω resistors R7 R10 3 3 kΩ resistors 1 Output impedance of VOUTL and VOUTR during suspend mode or lack of power s...

Страница 30: ...ors depending on required frequency response C10 C11 0 022 µF ceramic capacitors R1 R12 1 MΩ resistors R2 R5 1 5 kΩ resistors R3 R4 22 Ω resistors R6 R7 16 Ω resistors R8 R11 3 3 kΩ resistors 1 Output impedance of VOUTL and VOUTR during suspend mode or lack of power supply is 26 kΩ 20 which is the discharge path for C8 and C9 2 Descriptor programming through SPI is only available when PSEL and HOS...

Страница 31: ...n on the PCM2704 2705 2706 2707 operating environment see the Updated Operating Environments for PCM270X PCM290X Applications application report SLAA374 available through the TI web site at www ti com Copyright 2003 2009 Texas Instruments Incorporated Submit Documentation Feedback 31 Product Folder Link s PCM2704 PCM2705 PCM2706 PCM2707 ...

Страница 32: ...iptor Data Modification paragraph 21 Deleted HOST from list of circuit configuration terms 21 Deleted HOST from list of circuit configuration terms 25 Added notes to Figure 32 Figure 33 and Figure 34 for clarifying requirement of descriptor programing 28 Changes from Revision D December 2006 to Revision E Page Deleted operating environment information from data sheet and added reference to applica...

Страница 33: ...n PREVIEW Device has been announced but is not in production Samples may or may not be available OBSOLETE TI has discontinued the production of the device 2 RoHS TI defines RoHS to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances including the requirement that RoHS substance do not exceed 0 1 by weight in homogeneous materials Where de...

Страница 34: ...arties and makes no representation or warranty as to the accuracy of such information Efforts are underway to better integrate information from third parties TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals TI and TI suppliers consider certai...

Страница 35: ...W A0 Cavity QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE Pocket Quadrants Sprocket Holes Q1 Q1 Q2 Q2 Q3 Q3 Q4 Q4 User Direction of Feed P1 Reel Diameter All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter mm Reel Width W1 mm A0 mm B0 mm K0 mm P1 mm W mm Pin1 Quadrant PCM2704DBR SSOP DB 28 2000 330 0 16 4 8 2 10 5 2 5 12 0 16 0 Q1 PCM2704DBR SSOP DB 28 2000 3...

Страница 36: ...ll dimensions are nominal Device Package Type Package Drawing Pins SPQ Length mm Width mm Height mm PCM2704DBR SSOP DB 28 2000 356 0 356 0 35 0 PCM2704DBR SSOP DB 28 2000 336 6 336 6 28 6 PCM2705DBR SSOP DB 28 2000 356 0 356 0 35 0 PCM2706PJTR TQFP PJT 32 1000 356 0 356 0 35 0 Pack Materials Page 2 ...

Страница 37: ...Alignment groove width All dimensions are nominal Device Package Name Package Type Pins SPQ L mm W mm T µm B mm PCM2704DB DB SSOP 28 47 530 10 5 4000 4 1 PCM2704DB DB SSOP 28 47 500 10 6 500 9 6 PCM2705DB DB SSOP 28 50 530 10 5 4000 4 1 PCM2705DBG4 DB SSOP 28 50 530 10 5 4000 4 1 Pack Materials Page 3 ...

Страница 38: ...ion to corner pocket center CL Measurement for tray edge X direction to corner pocket center Text Chamfer on Tray corner indicates Pin 1 orientation of packed units All dimensions are nominal Device Package Name Package Type Pins SPQ Unit array matrix Max temperature C L mm W mm K0 µm P1 mm CL mm CW mm PCM2706PJT PJT TQFP 32 250 10 x 25 150 315 135 9 7620 12 2 11 1 11 25 Pack Materials Page 4 ...

Страница 39: ...S 1 All linear dimensions are in millimeters Any dimensions in parenthesis are for reference only Dimensioning and tolerancing per ASME Y14 5M 2 This drawing is subject to change without notice 3 This dimension does not include mold flash protrusions or gate burrs Mold flash protrusions or gate burrs shall not exceed 0 15 mm per side 4 This dimension does not include interlead flash Interlead flas...

Страница 40: ...6 Publication IPC 7351 may have alternate designs 7 Solder mask tolerances between and around signal pads can vary based on board fabrication site LAND PATTERN EXAMPLE EXPOSED METAL SHOWN SCALE 10X SYMM SYMM 1 14 15 28 15 000 METAL SOLDER MASK OPENING METAL UNDER SOLDER MASK SOLDER MASK OPENING EXPOSED METAL EXPOSED METAL SOLDER MASK DETAILS NON SOLDER MASK DEFINED PREFERRED SOLDER MASK DEFINED ...

Страница 41: ... 03 2018 NOTES continued 8 Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release IPC 7525 may have alternate design recommendations 9 Board assembly site may have different recommendations for stencil design SOLDER PASTE EXAMPLE BASED ON 0 125 mm THICK STENCIL SCALE 10X SYMM SYMM 1 14 15 28 ...

Страница 42: ... PLASTIC QUAD FLATPACK 4203540 A 11 01 1 0 45 0 30 32 7 00 SQ 0 95 1 05 Seating Plane 0 45 0 75 0 25 Gage Plane 0 80 0 20 SQ 9 00 1 00 1 20 0 10 0 05 0 15 0 20 0 09 M 0 7 NOTES A All linear dimensions are in millimeters B This drawing is subject to change without notice C Falls within JEDEC MS 026 ...

Страница 43: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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