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PCM2704C Datasheet Preview

PCM2704C Datasheet

Stereo Audio DAC

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Burr-Brown Audio
PCM2704C, PCM2705C, PCM2706C, PCM2707C
SBFS036B – MAY 2015 – REVISED AUGUST 2015
PCM270xC Stereo Audio DAC With USB Interface, Single-Ended Headphone Output and
S/PDIF Output
1 Features
1 On-Chip USB Interface:
– No Dedicated Device Driver Needed
– Full-Speed Transceivers
– Fully Compliant With USB 2.0 Specification
– USB 1.1 Descriptors With USB Audio Class
Support
– Certified by USB-IF
– Partially Programmable Descriptors
– Adaptive Isochronous Transfer for Playback
– Bus-Powered or Self-Powered Operation
• Sampling Rates: 32 kHz, 44.1 kHz, and 48 kHz
• On-Chip Clock Generator With Single 12-MHz
Clock Source
• Single Power Supply:
– Bus-Powered: 5 V, Typical (VBUS)
– 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% RL > 10 k, Self-
Powered
– THD + N: 0.025% RL = 32
– SNR = 98 dB
– Dynamic Range: 98 dB
– PO = 12 mW, RL = 32
– Oversampling Digital Filter
– Passband 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 (Model and Setting Dependent)
– Suspend Flag
– S/PDIF Out With SCMS
– External ROM Interface (PCM2704C/6C)
– Serial Programming Interface (PCM2705C/7C)
– I2S Interface (Selectable on PCM2706C/7C)
2 Applications
• USB Headphones
• USB Audio Speaker
• USB CRT/LCD Monitor
• USB Audio Interface Box
• USB-Featured Consumer Audio Product
3 Description
The PCM270xC are TI's single-chip USB stereo
audio digital-to-analog converters (DACs) with USB
2.0 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 areas (for example, vendor ID/product ID)
through the use of an external ROM (PCM2704C and
PCM2706C) or serial peripheral interface (SPI)
(PCM2705C and PCM2707C). The PCM270xC also
employ SpAct™ architecture, TI's unique system that
recovers the audio clock from USB packet data. On-
chip analog phase-locked loops (PLLs) with SpAct
enable playback with low clock jitter.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCM2704C
PCM2705C
SSOP (28)
5.30 mm × 10.20 mm
PCM2706C
PCM2707C
TQFP (32)
7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
USB
HID Controls
External ROM
SPI
PCM2704C/5C/6C/7C
Line Out
S/PDIF
I2S
VDD
VCCL
VCCR
VCCP
PGND
AGNDR
AGNDL
ZGND
DGND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

PCM2704C Datasheet Preview

PCM2704C Datasheet

Stereo Audio DAC

No Preview Available !

PCM2704C, PCM2705C, PCM2706C, PCM2707C
SBFS036B – MAY 2015 – REVISED AUGUST 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 7
7.1 Absolute Maximum Ratings ...................................... 7
7.2 ESD Ratings.............................................................. 7
7.3 Recommended Operating Conditions ...................... 8
7.4 Thermal Information: PCM2704C, PCM2705C......... 8
7.5 Thermal Information: PCM2706C, PCM2707C......... 8
7.6 Electrical Characteristics: PCM2704CDB,
PCM2705CDB, PCM2706CPJT, PCM2707CPJT ..... 9
7.7 Audio Interface Timing Characteristics ................... 11
7.8 Audio Clock Timing Characteristics ........................ 11
7.9 External ROM Read Interface Timing
Characteristics ......................................................... 11
7.10 SPI Timing Characteristics.................................... 12
7.11 Typical Characteristics .......................................... 14
8 Parameter Measurement Information ................ 17
9 Detailed Description ............................................ 18
9.1 Overview ................................................................. 18
9.2 Functional Block Diagrams ..................................... 18
9.3 Feature Description................................................. 20
9.4 Device Functional Modes........................................ 25
9.5 Programming........................................................... 26
9.6 Register Maps ......................................................... 29
10 Application and Implementation........................ 30
10.1 Application Information.......................................... 30
10.2 Typical Application ............................................... 30
11 Power Supply Recommendations ..................... 37
12 Layout................................................................... 37
12.1 Layout Guidelines ................................................. 37
12.2 Layout Example .................................................... 37
13 Device and Documentation Support ................. 40
13.1 Documentation Support ........................................ 40
13.2 Related Links ........................................................ 40
13.3 Community Resources.......................................... 40
13.4 Trademarks ........................................................... 40
13.5 Electrostatic Discharge Caution ............................ 40
13.6 Glossary ................................................................ 40
14 Mechanical, Packaging, and Orderable
Information ........................................................... 40
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (July 2012) to Revision B
Page
• Added Handling Ratings table, Feature Description section, Device Functional Modes, Application and
Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section ............................................................... 1
Changes from Original (August 2011) to Revision A
Page
• Changed product status from Mixed Status to Production Data ............................................................................................ 1
• Changed Features section to show full compliance with USB2.0 Specification (but still using USB1.1 descriptors) ............ 1
• Changed Description section to show USB2.0 compliance (USB1.1 was absorbed into 2.0 specification) .......................... 1
2 Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: PCM2704C PCM2705C PCM2706C PCM2707C


Part Number PCM2704C
Description Stereo Audio DAC
Maker etcTI
Total Page 30 Pages
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