PCM2706

Manufacturer Part NumberPCM2706
DescriptionThe PCM2704/5/6/7 is TI's single-chip USB stereo audio DAC with USB-compliant full-speed protocol controller and S/PDIF
ManufacturerTexas Instruments
PCM2706 datasheet
 

Specifications of PCM2706

Snr(typ)(db)98# Dacs2
# Inputs / # Outputs0 / 2Sampling Rate(max)(khz)48
Resolution(bits)16Digital Audio InterfaceUSB, I2S
Control InterfaceHID, SPISupply Voltage(s)(v)3.3, 5
Pd(typ)(mw)175Additional FeaturesS/PDIF Output, Ext. ROM I/F, Headphone Output
Operating Temperature Range(c)-25 to 85Pin/package32TQFP
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Page 1/39

Download datasheet (821Kb)Embed
Next
Burr-Brown Audio
www.ti.com.......................................................................................................................................................
STEREO AUDIO DAC WITH USB INTERFACE,
SINGLE-ENDED HEADPHONE OUTPUT AND S/PDIF OUTPUT
FEATURES
1
On-Chip USB Interface:
2345
– No Need of Dedicated Device Driver
– With Full-Speed Transceivers
– Fully Compliant With USB 1.1 Specification
– Certified by USB-IF
– Partially Programmable Descriptors
– Adaptive Isochronous Transfer for
Playback
– Bus-Powered or Self-Powered Operation
Sampling Rate: 32, 44.1, 48 kHz
On-Chip Clock Generator With Single 12-MHz
Clock Source
Single Power Supply:
– Bus-Powered: 5 V, Typical (V
– Self-Powered: 3.3 V, Typical
16-Bit Delta-Sigma Stereo DAC
– Analog Performance at 5 V (Bus-Powered),
3.3 V (Self-Powered):
– THD+N: 0.006% R
> 10 kΩ,
L
Self-Powered
– THD+N: 0.025% R
= 32 Ω
L
– SNR = 98 dB
– Dynamic Range: 98 dB
– P
= 12 mW, R
= 32 Ω
O
L
– Oversampling Digital Filter
– Pass-Band Ripple = ±0.04 dB
– Stop-Band Attenuation = –50 dB
– Single-Ended Voltage Output
– Analog LPF Included
Multiple Functions:
– Up to Eight Human Interface Device (HID)
Interfaces (Depending on Model and
Settings)
– Suspend Flag
– S/PDIF Out With SCMS
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SpAct is a trademark of Texas Instruments.
2
System Two, Audio Precision are trademarks of Audio Precision, Inc.
3
I2S is a trademark of NXP Semiconductors.
4
All other trademarks are the property of their respective owners.
5
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Not Recommended For New Designs
– External ROM Interface (PCM2704/6)
– Serial Programming Interface (PCM2705/7)
2
– I
S Interface (Selectable on PCM2706/7)
Package:
– 28-Pin SSOP (PCM2704/5)
– 32-Pin TQFP (PCM2706/7)
APPLICATIONS
USB Headphones
USB Audio Speaker
USB CRT/LCD Monitor
USB Audio Interface Box
USB-Featured Consumer Audio Product
DESCRIPTION
)
BUS
The PCM2704/5/6/7 is TI's single-chip USB stereo
audio DAC with USB-compliant full-speed protocol
controller and S/PDIF. The USB-protocol controller
works with no software code, but USB descriptors
can be modified in some parts (for example, vendor
ID/product ID) through the use of an external ROM
(PCM2704/6), SPI (PCM2705/7), or on request.
The PCM2704/5/6/7 employs SpAct™ architecture,
TI's unique system that recovers the audio clock from
USB packet data. On-chip analog PLLs with SpAct
enable playback with low clock jitter.
(1) The modification of the USB descriptor through external ROM
or SPI must comply with USB-IF guidelines, and the vendor
ID must be your own ID as assigned by the USB-IF. The
descriptor also can be modified by changing a mask; contact
your representative for details.
PCM2704, , PCM2705
PCM2706, PCM2707
SLES081F – JUNE 2003 – REVISED JANUARY 2009
Copyright © 2003–2009, Texas Instruments Incorporated
(1)

PCM2706 Summary of contents

  • Page 1

    ... Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Not Recommended For New Designs – External ROM Interface (PCM2704/6) – Serial Programming Interface (PCM2705/7) 2 – Interface (Selectable on PCM2706/7) Package: – 28-Pin SSOP (PCM2704/5) – 32-Pin TQFP (PCM2706/7) APPLICATIONS USB Headphones USB Audio Speaker ...

  • Page 2

    ... Not Recommended For New Designs ( CCR CCR DD BUS , CCP CCL CCR DD PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com –0 6.5 V –0 ±0.1 V ±0.1 V –0 6.5 V –0 0.3) V < –0 0.3) V < CCP –0 0.3) V < CCR – ...

  • Page 3

    ... R L bus-powered OUT V = –60 dB OUT EIAJ, A-weighted EIAJ, A-weighted PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 PCM2704DB, PCM2705DB, PCM2706PJT, PCM2707PJT UNIT MIN TYP MAX USB isochronous data format 2 3 ...

  • Page 4

    ... Suspend mode DAC operation DAC operation Ω) L (6) Suspend mode DAC operation DAC operation Ω) L (6) Suspend mode , V , CCR Bus-powered PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com PCM2704DB, PCM2705DB, PCM2706PJT, PCM2707PJT UNIT MIN TYP MAX 0. 0.55 V Vp-p CCL CCR 0 CCP 10 kΩ ...

  • Page 5

    ... CCP PGND 30 V CCR V AGNDR 31 COM AGNDR 32 V COM V CCR V R OUT PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 PCM2706/PCM2707 PJT PACKAGE (TOP VIEW PSEL XTO ...

  • Page 6

    ... BUS (3) (1) (1) (1) ) for bus-powered operation. Connect to V BUS (4) (4) (4) /2). Connect decoupling capacitor to PGND. CCP (4) (1) Copyright © 2003–2009, Texas Instruments Incorporated PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com (1) (2) (2) (2) ). Max power select during bus-powered for self-powered operation. DD ...

  • Page 7

    ... DGND 20 — Digital ground DOUT 17 O S/PDIF output I/O Data input/output for external ROM (PCM2706). Must be left open with pullup resistor (PCM2707). FSEL 9 I Function select (LOW: I FUNC0 5 I/O HID key state input (next track), active HIGH (FSEL = 1). I FUNC1 19 I/O HID key state input (previous track), active HIGH (FSEL = 1). I ...

  • Page 8

    ... USB Protocol Analog Controller PLL Control Endpoint ISO-Out FIFO Endpoint HID Endpoint 96 MHz Tracker PLL ( 8) (SpAct) Copyright © 2003–2009, Texas Instruments Incorporated PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com DGND ZGND SSPND V BUS D+ D– EEPROM CK (1) Interface DT HOST HID0/MS SPI ...

  • Page 9

    ... Control Endpoint I/F ISO-Out FIFO Endpoint (1) (1) (1) HID Endpoint (1) 96 MHz Tracker PLL ( 8) (SpAct) PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 AGNDR DGND ZGND SSPND V BUS D+ D– EEPROM CK (1) Interface DT HOST ...

  • Page 10

    ... S G001 0 −20 −40 −60 −80 10 100 1 G003 PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com AMPLITUDE vs FREQUENCY 0.1 0.2 0.3 0.4 0.5 f – Frequency [ Figure 2. Pass-Band Ripple AMPLITUDE vs FREQUENCY 10 100 1k 10k f – Frequency – kHz Figure 4. Stop-Band Characteristics Copyright © 2003–2009, Texas Instruments Incorporated ...

  • Page 11

    ... G005 TOTAL HARMONIC DISTORTION + NOISE 0.05 Self-Powered V OUT 0.04 0.03 0.02 0.01 0.00 5.0 5.5 3.0 G007 PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 vs FREE-AIR TEMPERATURE = − 100 T – Free-Air Temperature – Figure 6. ...

  • Page 12

    ... G009 105 Self-Powered 103 101 99 Dynamic Range 100 −50 −25 G011 PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com vs SAMPLING FREQUENCY = – Sampling Frequency – kHz S Figure 10. DYNAMIC RANGE and SNR vs FREE-AIR TEMPERATURE SNR 0 25 ...

  • Page 13

    ... G013 105 Self-Powered 103 101 99 SNR G015 PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 DYNAMIC RANGE and SNR vs SUPPLY VOLTAGE Dynamic Range SNR 3.1 3.2 3.3 3.4 3.5 3.6 V – Supply Voltage – Figure 14. ...

  • Page 14

    ... G017 0 −20 −40 −60 −80 −100 −120 −140 G019 Figure 20. Output Spectrum (–60 dB 8192) PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com SUSPEND CURRENT vs FREE-AIR TEMPERATURE 100 T – Free-Air Temperature – Figure 18. AMPLITUDE vs FREQUENCY ...

  • Page 15

    ... The 12-MHz crystal resonator must be connected to XTI (pin 28 for PCM2704/5, pin 12 for PCM2706/7) and XTO (pin 1 for PCM2704/5, pin 13 for PCM2706/7) with one large (1-MΩ) resistor and two small capacitors, the capacitance of which depends on the specified load capacitance of the crystal resonator ...

  • Page 16

    ... 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-kΩ (±5%) resistor. To avoid back voltage in self-powered operation, the device must not provide power to the pullup resistor on D+ while V of the USB port is inactive ...

  • Page 17

    ... Copyright © 2003–2009, Texas Instruments Incorporated Product Folder Link(s): PCM2704 and PCM2705 Not Recommended For New Designs FU IT TID1 UID3 Standard Audio Control Interface (IF #0) PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 OT Analog Out TID2 PCM2704/5/6/7 M0024-01 ...

  • Page 18

    ... HID0–HID2 pins (PCM2704/6) or the SPI port (PCM2705/7). Mute (0xE2) Volume up (0xE9) Volume down (0xEA) Extended HID Operation (PCM2705/6/7) By using the FUNC0–FUNC3 pins (PCM2706) or the SPI port (PCM2705/7), the following additional conditions can be reported to the host. Play/Pause (0xCD) Stop (0xB7) Previous (0xB6) ...

  • Page 19

    ... Digital Audio Interface—I S Interface Output (PCM2706/7) The PCM2706 and PCM2707 can support the I enabled mode, pins 4, 18, 19, 5, and 17 are assigned as DIN, SYSCK, BCK, LRCK, and DOUT, respectively. They provide digital output/input data in the 16-bit I interface format and timing are shown in ...

  • Page 20

    ... PARAMETER Figure 23. Audio Interface Timing t (SLL) t (SBH) PARAMETER Figure 24. Audio Clock Timing Copyright © 2003–2009, Texas Instruments Incorporated PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com 50 50 (LD T0010-05 MIN MAX UNIT ...

  • Page 21

    ... Low) is not supported. External ROM Descriptor (PCM2704/6) The PCM2704/6 supports an external ROM interface to override internal descriptors. Pin 3 (for PCM2704)/pin 15 (for PCM2706) is assigned as DT (serial data) and pin 2 (for PCM2704)/pin 14 (for PCM2706) is assigned (serial clock) of the I C interface when using the external ROM descriptor ...

  • Page 22

    ... Submit Documentation Feedback Product Folder Link(s): PCM2704 and PCM2705 Not Recommended For New Designs Repeated Start t (D-HD (CK-R) (RS-HD (HI) (RS-SU) PARAMETER Copyright © 2003–2009, Texas Instruments Incorporated PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com Stop t (DT- (DT-R) (P-SU) T0050-02 MIN MAX UNIT 100 kHz 4 ...

  • Page 23

    ... Copyright © 2003–2009, Texas Instruments Incorporated Product Folder Link(s): PCM2704 and PCM2705 Not Recommended For New Designs 2 C bus. This means that each data byte must be PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 Submit Documentation Feedback 23 ...

  • Page 24

    ... ROM Descriptor section. t (MCL) t (MDH) PARAMETER Figure 27. SPI Timing Diagram 16 Bits LSB MSB 16 Bits y N Frames MSB LSB MSB N Frames Figure 28. SPI Write Operation PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com t (MHH) 50 (MLH) 50 LSB 50 T0013-04 MIN TYP ...

  • Page 25

    ... ADDR FUNCTION HID status write HID status write and descriptor ROM address reset Descriptor ROM data write Reserved PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 ...

  • Page 26

    ... SOF Device Setup Ready for Setup Ready for Playback Figure 29. Initial Sequence PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com 3.3 V (Typ.) Î Î Î Î Î Î Î Î Î nd Î Î Î Î Î ...

  • Page 27

    ... 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 the suspend state, SSPND flag (pin 27 for PCM2704/5, Î Î pin 11 for PCM2706/7) is asserted. The PCM2704/5/6/7 wakes up immediately when detecting the non-idle state on the USB bus. Î Î ...

  • Page 28

    ... THD , but any other active component must not use V CC Figure 32. Bus-Powered Application NOTE: Figure 32 is for information only. The entire board design PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com C 2 SUSPEND VOLUME– VOLUME+ MUTE ...

  • Page 29

    ... V CCP Figure 33. Bus-Powered Application NOTE: Figure 33 is for information only. The entire board design PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 C 9 Headphone + ...

  • Page 30

    ... F electrolytic capacitors 0.022- F ceramic capacitors Ω resistors 3.3 kΩ resistors Figure 34. Self-Powered Application NOTE: Figure 34 is for information only. The entire board design PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com + C 8 Headphone + ...

  • Page 31

    ... Copyright © 2003–2009, Texas Instruments Incorporated Product Folder Link(s): PCM2704 and PCM2705 Not Recommended For New Designs APPENDIX PCM2704 PCM2705 PCM2706 PCM2707 PCM2704, , PCM2705 PCM2706, PCM2707 SLES081F – JUNE 2003 – REVISED JANUARY 2009 Submit Documentation Feedback 31 ...

  • Page 32

    ... Deleted operating environment information from data sheet and added reference to application report 32 Submit Documentation Feedback Product Folder Link(s): PCM2704 and PCM2705 Not Recommended For New Designs REVISION HISTORY ............................................................................................ section................................................................................... 19 paragraph................................................................................................................... 21 terms.......................................................................................................... 21 terms.......................................................................................................... 25 ........................................................................................... PCM2704 PCM2705 PCM2706 PCM2707 www.ti.com Page programing.......................... 28 Page ........................... 31 Copyright © 2003–2009, Texas Instruments Incorporated ...

  • Page 33

    ... PCM2705DBG4 NRND SSOP PCM2705DBR NRND SSOP PCM2705DBRG4 NRND SSOP PCM2706PJT ACTIVE TQFP PCM2706PJTG4 ACTIVE TQFP PCM2706PJTR ACTIVE TQFP PCM2706PJTRG4 ACTIVE TQFP PCM2707PJT ACTIVE TQFP PCM2707PJTG4 ACTIVE TQFP PCM2707PJTR ACTIVE TQFP PCM2707PJTRG4 ACTIVE TQFP (1) The marketing status values are defined as follows: Pins ...

  • Page 34

    ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but ...

  • Page 35

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PCM2704DBR SSOP DB PCM2704DBR SSOP DB PCM2705DBR SSOP DB PCM2706PJTR TQFP PJT PCM2707PJTR TQFP PJT PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 28 2000 330.0 17.4 8.5 28 2000 330 ...

  • Page 36

    ... Device Package Type PCM2704DBR SSOP PCM2704DBR SSOP PCM2705DBR SSOP PCM2706PJTR TQFP PCM2707PJTR TQFP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2000 DB 28 2000 DB 28 2000 PJT 32 1000 PJT 32 1000 Pack Materials-Page 2 11-Nov-2010 Width (mm) Height (mm) 336 ...

  • Page 37

    PJT (S-PQFP–N32) 0, 7,00 SQ 9,00 SQ 1,05 0,95 1,20 1,00 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Falls within JEDEC MS-026 0,45 0,20 M 0,30 0,15 ...

  • Page 38

    DB (R-PDSO-G**) 28 PINS SHOWN 0, 2,00 MAX PINS ** DIM A MAX A MIN NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not ...

  • Page 39

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...