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The Best USB Audio Single Chip for Stereo Digital Adaptor Application
Nitrogen D2 16-Bit Stereo USB Audio Controller
(Dolby Digital Live and DTS Interactive Software Technology Bundle)
Datasheet Version 1.02
C-MEDIA ELECTRONICS INC.
TEL: 886-2-8773-1100 FAX: 886-2-8773-2211 6F, 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106, R.O.C. For detailed product information, please contact TUsales@cmedia.com.twUT
Nitrogen D2
USB Audio With Dolby Digital Live and DTS Interactive Solution
NOTICES
THIS DOCUMENT IS PROVIDED "AS IS" WITH NO WARRANTIES WHAT SO EVER, INCLUDING ANY WARRANTY OF MERCHANT ABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, DOCUMENT OR SAMPLE. ALL RIGHTS RESERVED. NO PART OF THIS DOCUMENT MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING INFORMATION STORAGE AND RETRIEVAL SYSTEMS, WITHOUT PERMISSION IN WRITING FROM C-MEDIA ELECTRONICS, INC.
UCOPYRIGHT
Copyright (c) 2005-2007 C-Media Electronics Inc. All rights reserved. All content included on this document, such as text, graphics, logos, button icons, images, audio clips, digital downloads, data compilations, and software, is either the exclusive property of C-Media Electronics Inc., its affiliates (collectively, "C-Media"), its content suppliers, or its licensors and protected by Republic of China and international copyright laws.
UTRADEMARKS
C-Media, the C-Media Logo, Xear 3D, Xear 3D Logo and Speaker Shifter are trademarks of C-Media Electronics Inc. in Republic of China and/or other countries. Dolby Digital and dts are trademarks of Dolby Laboratories, Inc. and DTS Corporate. and All other brand, logos and product names listed are trademarks or registered trademarks of their respective holders and are hereby recognized as such.
*C-Media reserves the right to modify the specifications without further notice* Date: 09/25/2005
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USB Audio With Dolby Digital Live and DTS Interactive Solution
TABLE OF CONTENTS
1. DESCRIPTIONS AND OVERVIEW 2. FEATURES 3. PIN DESCRIPTIONS 3.1 PIN ASSIGNMENT BY PIN NUMBER 3.2 PIN-OUT DIAGRAM 3.3 PIN SIGNAL DESCRIPTIONS 4. BLOCK DIAGRAM 5. ORDERING INFORMATION 6. FUNCTION DESCRIPTIONS 6.1 USB INTERFACE 6.1.1 6.1.2 6.1.3
DEVICE DESCRIPTOR CONFIGURATION DESCRIPTOR USB AUDIO TOPOLOGY DIAGRAM
5 6 8 8 8 9 12 13 14 14 14 15 15 16 17 17 17 19 20 20 20 21 23
Version: 1.02
6.2 EEPROM (93C46) CONTENT FORMAT 6.3 HID FEATURE 6.3.1 6.3.2
WHAT'S HID HID DESCRIPTOR
6.4 DYNAMIC RANGE CONTROL (DRC) 6.5 DOLBY DIGITAL LIVE TECHNOLOGY 6.5.1 6.5.2
DOLBY DIGITAL LIVE TECHNOLOGY DIGITAL THEATER SYSTEM (DTS INTERACTIVE)
6.6 BENEFITS AND ADVANTAGE 7. ELECTRICAL CHARACTERISTICS
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USB Audio With Dolby Digital Live and DTS Interactive Solution
7.1 ABSOLUTE MAXIMUM RATING 7.2 OPERATION CONDITIONS 7.3 SPERKER IMPEDANCE VS. OUTPUT POWER (PER CHANNEL) 7.4 AUDIO PERFORMANCE
8. AUDIO PERFORMANCE CURVES
23 23 23 24 25 25 25 25 26 26 26 27 28
8.1 FREQUENCY RESPONSE (10K OHM LOADING) 8.1.1 8.1.2
FREQUENCY RESPONSE @ 44.1 KS/SEC FREQUENCY RESPONSE @ 48 KS/SEC
8.2 PASSBAND RIPPLE (10K OHM LOADING) 8.2.1 8.2.2
PASSBAND RIPPLE @ 44.1 KS/SEC PASSBAND RIPPLE @ 48 KS/SEC
9. REFERENCE APPLICATION CIRCUIT
10. REFERENCE
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1. DESCRIPTIONS AND OVERVIEW
Nitrogen D2 is the world first USB audio chip that with Dolby Digital Live and dts Interactive sounds technology supporting. This new chip design can provided more efficiency features and high quality sound for portable USB audio products application. It is a highly integrated single chip for USB stereo audio and SPDIF output application. Minimum external components are needed for building an USB audio system, which makes Nitrogen D2 a simple and very cost-effective solution. Nitrogen D2 is design for all kind of PC base USB personal multi-media device products. It is USB 2.0 full speed compatible and utilizes USB bus power for plug-and-play feature. Via C-Media Xear 3D Sound USB audio driver, users can avail themselves of a much better virtual 7.1 CH environment capable. For high-end multi-media application, this light and portable personal audio device can easy to processing any sound source to Dolby Digital AC-3 and dts raw data by real-time encoding function. The world first innovation software function to grade up every PC system and output high quality digital sound effects for link up with high-end home theater equipments like amplifier, DVD player or decoder etc. This special feature is Dolby Digital Live function modules. As we know, Dolby Digital and dts (Digital Theater System) are the world well-known sound technology brands and generality using on consumer electronics. Therefore, if PC products need to be home theater equipment or media center this would be key feature and selling point for product development. These functions not only provide easy bridge to connect PCs and consumer electronics but also adding value and upgrade sound quality to PC products. In the future, PCs can put on Dolby Digital and dts logo on it and provide advanced sound quality to end-user. All of modules were implemented by C-Media in software technology and anyone can request these features by license from Dolby Lab. and DTS Corporate. through C-Media. Moreover, the innovation technology DRC feature was integrated on Nitrogen D2. This Dynamic Range Control function can support high efficiency volume output to get loudness sound effect similar D class amplifier capability. Vender can just using single chip to saving external amplifier component and getting a better listen experience when listen to a music source with wide dynamic range.
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For vender specific requests, customers can use an EEPROM to create vendor specific VID / PID / Product String, and even special hardware configuration. More flexible and customized design is possible with GPIO pin, which is accessible by USB vendor specific request. Volume control VR input pin; a traditional speaker front panel design can be built. Nitrogen D2 support USB standard HID Interface which provide Volume _up / Volume _down / Playback mute Buttons and Rotary Encoder for pure digital volume control.
2. FEATURES
USB 2.0 Full Speed Compatible and USB IF certification USB Audio Devices Class Specification Ver1.0 Compatible USB Bus Powered 500mA, without External Power Supply High performance 16-Bit Stereo, 48 / 44.1 KHz Sampling Rate for Audio Playback S/PDIF Output Interface Embedded USB Transceiver Embedded High Performance 16-Bit Audio DAC Embedded Digital Control Power Amplifier for Speaker Driving Support Power Amplifier Enable / Disable Control Pin
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Support Dynamic Range Control (DRC) Feature to Provide a Better Listen Experience Embedded Power-On-Reset Block Embedded 5V to 3.3V Regulator with Voltage Level Detector for Single 5V External Power Supply Embedded Temperature Protection Circuit Embedded X2 Modulation for Higher Audio Quality Embedded Anti-Pop Circuit with Internal Feedback Structure Single 12MHz Crystal Input with Embedded PLL Isochronous Transfer using Adaptive Synchronization with Internal PLL External EEPROM Interface for Vendor Specific VID / PID / Product String EEPROM Read / Write Function via Vendor Specific Request for Mass Production Convenience Analog Volume Control Input with Simple External VR Circuit Digital Volume Control Input with Digital Rotary Encoder or Vol_up / Vol_dn / Play_mute Bottoms Vol_up / Vol_dn / Play_mute Pins and Digital Rotary Encoder Interface Support USB HID Devices Class Ver1.11 for Host Volume Control Synchronization 3.3V I/O with 5V Tolerance Dolby(R) Digital Audio Streaming via S/PDIF Output Supports USB Suspend / Resume Mode and Remote Wakeup with Digital Volume Control Pins LED Indicator Pin During Playback 1 GPIO pin for Application Specific Usage Dolby Digital Live Software Sound Technology Bundle Digital Theater System (DTS Interactive) Software Sound Technology Bundle USB Software Driver Compatible with Win 98SE / Win ME / Win 2000 / Win XP
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3. PIN DESCRIPTIONS
3.1 PIN ASSIGNMENT BY PIN NUMBER
Pin # Signal Name Pin # Signal Name Pin # Signal Name Pin # Signal Name 1 EESK 13 NC 25 AVDD 37 NC 2 DVDD5V 14 NC 26 AVDD 38 DRCEN 3 EECS 15 REGV 27 LOL 39 SPDIFO 4 EEDW 16 NC 28 LOL 40 PDSW 5 EEDR 17 USB_DP 29 LOL 41 PAEN 6 LEDO 18 NC 30 LOL 42 GPIO 7 MUTE 19 USB_DM 31 LOR 43 VOL_UP 8 DVDD5V 20 NC 32 LOR 44 VOL_DN 9 DVDD5V 21 DVSS 33 LOR 45 DVSS 10 VP 22 TEST 34 LOR 46 NC 11 VN 23 VREF 35 AVSS 47 XTAL_O 12 NC 24 VOLADJ 36 AVSS 48 XTAL_I
*Note: -NC- means No-Connect
3.2 PIN-OUT DIAGRAM
VOL_DN VOL_UP XTAL_O SPDIFO DRC EN NC
37 36 AVSS AVSS LOR LOR LOR LOR LOL LOL LOL
XTAL_I
48 EESK DVDD5V EECS EEDW EEDR LEDO MUTE DVDD5V DVDD5V VP VN NC 12 13 1
Nitrogen D2
25 24
PDSW
PAEN
DVSS
GPIO
NC
LOL AVDD AVDD
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VOL_ADJ
USB_DM
USB_DP
REGV
DVSS
TEST
VREF
NC
NC
NC
NC
NC
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3.3 PIN SIGNAL DESCRIPTIONS
Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Symbol EESK DVDD5V EECS EEDW EEDR LEDO MUTE DVDD5V DVDD5V VP VN NC NC NC REGV NC USB_DP NC USB_DM NC DVSS TEST VREF Type DO, 8mA, SR P DO, 8mA, SR DO, 8mA, SR DI, ST, PD, 5VT DO, 8mA, SR DI, ST, PU P P DI, ST, PU DI, ST, PU AO AIO AIO P DI, ST, PD AO Description EEPROM Interface Clock 5V Power Supply for Digital Circuit EEPROM Interface Chip Select EEPROM Interface Write to EEPROM EEPROM Interface Read from EEPROM LED Indicator for Playback Mute Pin (HID Standard) 5V Power Supply 5V Power Supply Digital Rotary Encoder Interface Pin A Digital Rotary Encoder Interface Pin B No Connect No Connect No Connect Regulator output 3.3V No Connect USB Data D+ No Connect USB Data DNo Connect Digital Ground Test Mode Select Pin, Pull-Down in normal Operation Connecting to External Decoupling Capacitor for Embedded Band-gap Circuit; 2.25V Output Version: 1.02
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Analog Volume Control Input from external VR circuit. 24 VOLADJ AI 0 ~ 2.25V:+3dB / mute 3.5 ~ 5V: 0dB 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 AVDD AVDD LOL LOL LOL LOL LOR LOR LOR LOR AVSS AVSS NC DRCEN SPDIFO P P AO AO AO AO AO AO AO AO P P DI DO, 8mA, SR 5V Power Supply for Analog Circuit 5V Power Supply for Analog Circuit Line Out Left Channel Line Out Left Channel Line Out Left Channel Line Out Left Channel Line Out Right Channel Line Out Right Channel Line Out Right Channel Line Out Right Channel Analog Ground Analog Ground No Connect 1:DRC ON (default) S/PDIF Data Output Power Down Switch Control Signal Output 40 PDSW DO, 8mA, SR 1: Normal Mode 0: Power Down Mode (Suspend Mode) Power Amplifier Control Input, Connect to a Switch or Pull-High in Normal Operation. 41 PAEN DI, ST H: Enable Power Amplifier (Normal Mode) L: Disable Power Amplifier Date: 09/25/2005
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0:DRC Off
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42 43 44 45 46 47 48
GPIO VOL_UP VOL_DN DVSS NC XTAL_O XTAL_I
DIO, 8mA, ST, GPIO Pin, Controlled via Vender Specific Command SR, PD DI, ST, PU DI, ST, PU P AO AI Volume Up Pin (HID Standard) Volume Down Pin (HID Standard) Digital Ground No Connect Output Pin for 12MHz Oscillator Input Pin for 12MHz Oscillator
*NoteU:DI / DO / DIO - Digital Input / Output / Bi-Directional Pad AI / AO / AIO - Analog Input / Output / Bi-Directional Pad P - Power Pin SR - Slew Rate Control ST - Schmitt Trigger PD / PU - Pull Down / Pull Up 5VT - 5 Volt Tolerant (3.3V Pad)
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4. BLOCK DIAGRAM
VOL_DN VOLADJ VOL_UP SPDIFO PDSW
MUTE
PAEN
VP
VN
D+ DUSB I/F FIFO
HID Control I/F
ADC
TEST LEDO GPIO
Dynamic Range Control
2x Over Sampling Digital Filter
DAC
VOL
- 43.5~ +3dB
OP
LOL
DAC
VOL
- 43.5 ~ +3dB
OP
LOR
EEDR EEDW EESK EECS EEPROM I/F
USB Clock Gen
Audio Clock Gen
Bandgap
VREF
Crystal OSC
Power Supply
Block Diagram Of Nitrogen D2
XTAL_O
XTAL_I
5V
REGV (3.3V)
GND
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5. ORDERING INFORMATION
Model Number Nitrogen D2 Package 48-Pin LQFP 7mmx7mmx1.4mm (Plastic) Operating Ambient Temperature 0oC to +70oC Supply Range DVdd = 5V, AVdd = 5V
48-Lead Thin Plastic Quad Flatpack (LQFP)
Outline Dimensions *Dimensions shown in inches and (mm)
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6. FUNCTION DESCRIPTIONS
6.1 USB INTERFACE
6.1.1 DEVICE DESCRIPTOR Offset 0 1 2 4 5 6 7 8 10 12 14 Field bLength bDescriptorType bcdUSB bDeviceClass bDeviceSubClass bDeviceProtocol bMaxPacketSize0 idVendor idProduct bcdDevice iManufacturer Size 1 1 2 1 1 1 1 2 2 2 1 Value (Hex) 12 01 0110 00 00 00 08 0D8C 0104 0010 01 Endpoint Zero Size = 8 bytes Vendor ID Product ID Device Release Number Index of string descriptor describing manufacturer -> "C-Media INC." Index of string descriptor describing product -> "C-Media USB Audio Index of string descriptor describing the device's serial number Configurations number = 1 Total 18 Bytes Device Descriptor USB 1.1 compliant. Description
15
iProduct
1
02
"
16 17
iSerialNumber bNumConfigurations
1 1
00 01
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6.1.2 CONFIGURATION DESCRIPTOR Offset 0 1 2 Field bLength bDescriptorType wTotalLength Size 1 1 2 Value (Hex) 09 02 008D Total 9 Bytes Configuration Descriptor Total length of data returned for this configuration. Number of interfaces supported by this Configuration. Description
4 5 6 7 8
bNumInterfaces bConfigurationValue iConfiguration bmAttributes bMaxPower
1 1 1 1 2
03 01 00 80 FA
Self-powered without Remote Wakeup Maximum power consumption of the USB. 0xFA=500 mA
6.1.3 USB AUDIO TOPOLOGY DIAGRAM
USB streaming ID = 01
Feature Unit (Volume) (Mute) ID = 0D
Speaker ID = 03
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6.2 EEPROM (93C46) CONTENT FORMAT
Nitrogen D2 supports four-wire serial EEPROM interface. When an external serial EEPROM is detected, Vendor ID, Product ID, and Product String reported within Device Descriptor will be derived from the content of serial EEPROM. The setting values of serial EEPROM is shown below: Address 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16~63 Contents 0x434D (*Note1) Vender ID Product ID String1, String0 String3, String2 String5, String4 String7, String6 String9, String8 String11, String10 String13, String12 String15, String14 String17, String16 String19, String18 String21, String20 String23, String22 Bit 0: DRC Enable / Disable --
*Note: The first word of the EEPROM is a magic code. Only when it matches, the IC will regard the serial EEPROM valid.
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6.3 HID FEATURE
Nitrogen D2 provides HID feature with user setting to Volume-Up, Volume-Down, Playback-Mute button pin, and the Digital-Rotary-Encoder for Volume Control is reported to the host to synchronize host side setting. 6.3.1 WHAT'S HID USB protocols can configure devices at startup or when they are plugged in at run time. These devices are broken into various device classes. Each device class defines the common behavior and protocols for devices that serve similar functions. The HID (Human Interface Device) class is one of the device classes. The HID class consists primarily of devices that are used by humans to control the operation of computer systems. Typical examples of HID class devices include: Keyboards and pointing devices, for example: mouse, trackballs, and joysticks. Front-panel controls, for example: knobs, switches, buttons, and sliders. Controls that might be found on devices such as VCR remote controls, games or simulation devices, for example: data gloves, throttles, and steering wheels. Devices that may not require human interaction but provide data in a similar format to HID class devices, for example: bar-code readers, thermometers, or voltmeters.
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6.3.2 HID DESCRIPTOR HID Interface Descriptor Offset 0 1 2 3 Field bLength bDescriptorType bInterfaceNumber bAlternateSetting Size 1 1 1 1 Value (Hex) 09 04 02 00 Description Size of this descriptor: 9 byte INTERFACE descriptor type Number of Interface alternate 0 Version: 1.02
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Offset 4 5 6 7 8
Field bNumEndpoints bInterfaceClass bInterfaceSubClass bInterfaceProtocol iInterface
Size 1 1 1 1 1
Value (Hex) 01 03 00 00 00
Description Number of endpoints used by this Interface: 1 HID Interface Class No Subclass Must be set to 0 Index of a string descriptor that describes this interface.
HID Descriptor Offset 0 1 2 4 5 6 7 Field bLength bDescriptorType bcdHID bCountryCode bNumDescriptors bDescriptorType wDescriptorLength Size 1 1 2 1 1 1 2 Value (Hex) 09 21 0100 00 01 22 002A Report Descriptor Numeric expression that is the total size of the optional descriptor Description Total 9 Bytes HID Descriptor Type HID class version 1.00
Interrupt IN Endpoint Descriptor Offset 0 1 2 3 4 6 Field bLength bDescriptorType bEndpointAddress bmAttributes wMaxPacketSize bInterval Size 1 1 1 1 2 1 Value (Hex) 07 05 81 03 0003 04 Description Total 7 Bytes ENDPOINT Descriptor Type IN Endpoint Endpoint number = 3 Interrupt endpoint type Maximum packet size: 4 bytes Interrupt Interval: 4ms
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6.4 DYNAMIC RANGE CONTROL (DRC)
Nitrogen D2 include a new feature called Dynamic Range Control (DRC), and with a default ON setting (Users can still turn it off within the Windows audio advance control panel) Dynamic range is defined as the difference, in decibels (dB), between the loudest and quietest sounds in any particular piece of audio content. Classical music is a good example, with ranges from piano (soft) to forte to FFF (for extremely loud). Movies also typically have a wide dynamic range, which may cause you to have to turn the volume up and down as scenes change. For example, when watching a movie at home, you may be forced to turn up volume to hear the dialog in a quiet scene, and then quickly turn it down again during a car chase scene that follows. In this way, there may be times in a home theater environment when it would be useful to be able to control the dynamic range.
+20dB +10dB 0dB -10dB -20dB -30dB -40dB -50dB -60dB A B Lower Levels Raised Peaks Reduced
With Dynamic Range Control enabled, the full dynamic range (A) of the program is reduced (B).
Peaks Clipped Peaks Reduced
DRC
Lower Levels hard to heard A B Lower Levels Raised
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6.5 DOLBY DIGITAL AND DTS SOUND TECHNOLOGY
6.5.1 DOLBY DIGITAL LIVE TECHNOLOGY C-Media Xear 3DTM Sound Solution provides another state-of-the-art high quality audio function--Dolby digital AC-3 encoder module. With this real-time software encoder, the existing and future customers who are using C-Media USB audio solution and devices can obtain this digital quality audio output by S/PDIF format much easier than before. This function can output various 3D and environmental sound effects by high quality AC-3 encoding; in the meantime, it exhibits supreme efficiency--it takes only 7% of CPU consumption from a Pentium 4 Processor. A technology that can encode all the digital audio content on PC into Dolby Digital stream in real-time. It can then be sent to external decoder for playback. All path are digital and wiring is simple.
6.5.2 DIGITAL THEATER SYSTEM (DTS interactive) Besides Dolby, C-Media was also the world first PC audio provider whom can integrate whole DTS Digital DSP technology in software module. Everyone knows that, DTS is the famous of the world sound technology which guarantee high quality and performance. DTS Interactive can take any content (WMA, MP3, CD, and more!) to transfer 5.1 multi-chances with real-time whenever play on line game, listen music, and watch VCD. A real-time DTS encoder which takes any LPMC (2 channel or more) and encodes it into DTS bit stream. The data transfer format is 48 KHz at 1.5 mb/sec. Just using a single cable connection to your DTS enabled surround sound system such as, powered PC speakers, an A/V receiver or any other DTS compatible surround sound system.
Better yet, the pure digital signal not only prevents the audio signal from distortion, but also reduces the number of wires connected between PC and a HI-FI audio system. That is to say, this breakthrough real-time AC-3 or DTS encoder can digitally transmit data from PC to HI-FI system via a single RCA cable, instead of three pairs in an analog signal case in the past.
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6.6 BENEFITS AND ADVANTAGES
Uses a single digital connection Transforms all PC audio signals into a Dolby and DTS Digital signal Optimized for low-latency interactive applications Provides realistic 5.1-channel surround sound effects during interactive video game play
Advantages of this feature 1.Getting higher quality audio signal output compared with any other SPDIF-Out solutions. C-Media Xear 3DTM Plus DDL or DTS INTERACTIVE encoder sound solution can directly process and transmit any PC sound source to digital AC-3 or DTS signal. Digital-transmitted data processed by software driver can absolutely rule out the characteristics influence of DAC quality. Therefore, users are able to get the best sound quality. 2.General PC audio SPDIF-Out solution can only provide 2CH PCM data to external amplifier. If users want to output high quality digital AC-3 or DTS INTERACTIVE bit-stream, they have to rely on software DVD player, from which only DVD playback is achievable. In that case, it will limit and impair the high quality multi-channel sound Date: 09/25/2005 Version: 1.02
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enjoyment. C-Media DDL or DTS INTERACTIVE encoder solution not only retains the above functions, but also provides other possible applications on PC audio. Xear 3DTM plus AC-3 or DTS encoder sound solution can process any type of sound sources, and people are able to obtain 7.1CH output by using virtual SPEAKER SHIFTERTM to create optimized personal listening environment. 3.In terms of 3D gaming, C-Media Xear 3DTM sound engine for Dolby Digital Live or DTS INTERACTIVE encoder are far better than Window DirectX 3D sound emulator, in that it is powered by sophisticated HRTF (Head Related Transfer Function) library, supporting environmental effects (EAX 1.0 & 2.0 compatible) to create highly immersive 3D gaming experience. All interactive sound effects of 3D game can real-time encoding to AC-3 or DTS INTERACTIVE bit-stream and getting high quality digital signal to external decoder and speakers for enjoyment.
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7. ELECTRICAL CHARACTERISTICS
7.1 ABSOLUTE MAXIMUM RATING
Symbol Dvmin Dvmax Avmin Avmax Dvinout Avinout TBstg
B
Parameter Min Digital Supply Voltage Max Digital Supply Voltage Min Analog Supply Voltage Max Analog Supply Voltage Voltage on any Digital Input or Output Pin Voltage on any Analog Input or Output Pin Storage Temperature Range ESD Machine Mode Latch Up Test
Value - 0.3 +6 - 0.3 +6 -0.3 to +5.5 -0.3 to +5.5 -40 to +125 2000 200 200
Unit V V V V V V
0
P PC
ESD (HBM) ESD Human Body Mode ESD (MM) Latchup
V V mA
7.2 OPERATION CONDITIONS
Min Analog Supply Voltage Digital Supply Voltage Total Power Consumption Suspend Mode Power Consumption Operating ambient temperature 4.5 4.5 0 Typ 5.0 5.0 Max 5.5 5.5 500 320 70 Unit V V mA uA
o
P PC
7.3 SPERKER IMPEDANCE VS. OUTPUT POWER (PER CHANNEL)
Loading (Ohm) Items Vpp Vrms W(rms/sin wave) W(rms/square wave) W(PMPO) 4 Ohm 3.14 1.11 308 mW 616 mW 2460 mW 8 Ohm 3.4 1.202 181 mW 361 mW 1450 mW 32 Ohm 3.635 1.285 52 mW 103 mW 410 mW 10K Ohm 3.722 1.316 0.17 mW 0.35 mW 1 mW
*Note1: Test Condition @ 25oC, 5 Volt +- 10%, 1KHz Sin Wave
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*Note2: Typical Output with THD+N < 1%; Maximal Output with THD+N < 10%
7.4 AUDIO PERFORMANCE
Min Resolution Frequency response @ 48KHz Frequency Response @ 44.1KHz Passband Ripple @ 48 KHz Passband Ripple @ 44.1 KHz DAC (10K Ohm Loading) SNR Dynamic Range THD + N Output Voltage (rms) DAC (32 Ohm Loading) SNR Dynamic Range THD + N Output Voltage (rms) DAC (8 Ohm Loading) SNR Dynamic Range THD + N Output Voltage (rms) DAC (4 Ohm Loading) SNR Dynamic Range THD + N Output Voltage (rms) ---97.45 95.89 -52.76 1.11 ---dB dB dB Vrms ---97.67 96.03 -53.28 1.202 ---dB dB dB Vrms ---97.68 95.99 -57.82 1.285 ---dB dB dB Vrms ---97.75 96.27 -67.97 1.316 ---dB dB dB Vrms -20 20 40 40 Typ 16 ----Max -20K 20K 9.6K 8.8K Unit Bits Hz Hz Hz Hz
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8. AUDIO PERFORMANCE CURVES
8.1 FREQUENCY RESPONSE (10K OHM LOADING)
8.1.1 FREQUENCY RESPONSE @ 44.1 KS/SEC
C-MEDIA Digital Playback (PC-D-A) for Line O utput Frequency Response 05/31/05 14:10:33
+1 +0 d B r A -1 -2 -3 -4 -5 -6 20 50 100 200 500 Hz
Sw eep 1 1 Trace 1 2 C olor C yan Yellow Line Style Solid Solid Thick 3 3 D ata Fas ttes t.C h.1 Am pl!N orm alize Fas ttes t.C h.2 Am pl!N orm alize WL-Multitone-44k.at2c Axis Left Left C om m ent
1k
2k
5k
10k
8.1.2 FREQUENCY RESPONSE @ 48 KS/SEC
C-MED IA Digital Playback (PC-D-A) for Line Output Frequency Response 05/31/05 14:07:22
+1 +0 d B r A -1 -2 -3 -4 -5 -6 30 50 100 200 500 Hz
Sw eep 1 1 Trace 1 2 C olor C yan Yellow Line Style Solid Solid Thick 3 3 D ata Fas ttes t.C h.1 Am pl!N orm alize Fas ttes t.C h.2 Am pl!N orm alize WL-Multitone-48k.at2c Axis Left Left C om m ent
1k
2k
5k
10k
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8.2 PASSBAND RIPPLE (10K OHM LOADING)
8.2.1 PASSBAND RIPPLE @ 44.1 KS/SEC
C-MEDIA Digital Playback (PC-D-A) for Line Output Passband Ripple @44.1ks/sec 05/31/05 14:11:07
+0.4 +0.2 d B -0 -0.2 -0.4 40 50 100 200 500 Hz
Sweep 1 1 Trace 1 2 Color Cyan Yellow Line Style Solid Solid Thick 3 3 Data Fas ttes t.Ch.1 Am pl!Norm alize Fas ttes t.Ch.2 Am pl!Norm alize Axis Left Left Com m ent
1k
2k
5k
8k
WL-Pas s bandRipple-M44k.at2c
8.2.2 PASSBAND RIPPLE @ 48 KS/SEC
C-MEDIA Digital Playback (PC-D-A) for Line Output Passband Ripple @48ks/sec 05/31/05 14:09:08
+0.4 +0.2 d B -0 -0.2 -0.4 40 50 100 200 500 Hz
Sweep 1 1 Trace 1 2 Color Cyan Yellow Line Style Solid Solid Thick 3 3 Data Fasttes t.Ch.1 Am pl!Norm alize Fasttes t.Ch.2 Am pl!Norm alize Axis Left Left Com m ent
1k
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5k
9k
WL-Pass bandRipple-M48k.at2c
Date: 09/25/2005
- 26 -
Version: 1.02
Nitrogen D2
USB Audio With Dolby Digital Live and DTS Interactive Solution
9. REFERENCE APPLICATION CIRCUIT
Date: 09/25/2005
- 27 -
Version: 1.02
Nitrogen D2
USB Audio With Dolby Digital Live and DTS Interactive Solution
10. Reference

Universal Serial Bus Specification, Version 2.0 Universal Serial Bus Device Class Definition for Audio Devices, Version 1.0. Universal Serial Bus Device Class Definition for Human Interface Devices (HID), Version 1.11 Dolby Digital Live and dts Interactive function specification
End of Specifications
C-MEDIA ELECTRONICS INC. 6F., 100, Sec. 4, Civil Boulevard, Taipei, Taiwan 106 R.O.C. TEL:886-2-8773-1100 FAX:886-2-8773-2211 E-mailT sales@cmedia.com.twU
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URLT http://www.cmedia.com.twU
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T
Date: 09/25/2005
- 28 -
Version: 1.02

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