CRD4299-1AMR

CRD4299-1 AMR CrystalClear™ AC '97 AMR Reference Design Features l AMR Description The CRD4299-1 AMR add-in board reference design showcases Cirrus Logic’s Crystal Audio AC ’97 CS4299 SoundFusion, and is Audio/Modem Riser Specification[2], compliant. The CRD4299-1 AMR card is 2.7" high by 3.6" long. The CRD4299-1 AMR reference design includes a customer ready manufacturing kit. Included in the kit are a full set of schematic design files (OrCAD® 7.2 format), PCB job files (PADS®ASCII), PCB artwork files (Gerber) , bracket drawings, and bill of materials. The design is production ready as is, or can be easily modified to incorporate specific OEM changes. Documentation source files are available to assist the OEM to quickly provide an accurate end user manual. ORDERING INFO CRD4299-1 AMR Audio Codec add-in card designed to meet the Intel® Audio/Modem Riser Specification l High quality, low cost, 2-layer, single sided adapter board l CS4299 SoundFusion® Audio Codec ’97 l Complete suite of Analog and Digital I/O connections: - Line In, Line Out, Mic In, Modem Audio connection, CD Audio In, Video In, Aux In, Headphone Out and Optical Digital Out l Meets or exceeds Microsoft’s PC 97, PC 98, and PC 99, both required and advanced, audio performance requirements. CS4299 Preliminary Product Information P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.cirrus.com This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. Copyright © Cirrus Logic, Inc. 1999 (All Rights Reserved) OCT ‘99 DS319RD1A1 1 CRD4299-1 AMR TABLE OF CONTENTS 1. GENERAL INFORMATION ............................................................................ 4 2. REFERENCE DESIGN FEATURES ............................................................... 4 2.1 Digital Audio Out .................................................................................. 4 2.2 CS4299 Audio Codec ‘97 .................................................................... 4 2.2.1 Power Requirements .................................................................. 5 2.3 Analog I/O ............................................................................................ 5 2.4 Audio I/O .............................................................................................. 5 2.4.1 Line Out ...................................................................................... 5 2.4.2 Headphone Out .......................................................................... 5 2.4.3 Line In ........................................................................................ 5 2.4.4 Mic In .......................................................................................... 5 2.4.5 CD Audio In ................................................................................ 6 2.4.6 Aux In ......................................................................................... 6 2.4.7 Video In ...................................................................................... 6 2.4.8 Modem Audio Connection .......................................................... 6 3. SCHEMATIC DESCRIPTION ......................................................................... 7 3.1 Figure 11: Block Diagram .................................................................... 7 3.2 Figure 12: AMR Bus Interface ............................................................. 7 3.3 Figure 13: Power Supply ..................................................................... 7 3.4 Figure 14: CS4299 AC ‘97 Audio Codec ............................................. 7 3.5 Figure 15: Analog Inputs ...................................................................... 7 3.6 Figure 16: Audio Outputs ..................................................................... 8 3.7 Figure 17: Microphone Pre-amp and Bias ........................................... 8 3.8 Component Selection .......................................................................... 8 3.9 EMC Components ............................................................................... 8 4. GROUNDING AND LAYOUT ......................................................................... 9 4.1 Partitioned Voltage and Ground Planes .............................................. 9 4.2 CS4299 Layout Notes .......................................................................... 9 5. AUDIO PERFORMANCE EVALUATION ..................................................... 10 5.1 Plots ................................................................................................... 10 6. REFERENCES .............................................................................................. 17 7. ADDENDUM ................................................................................................. 17 8. BILL OF MATERIALS .................................................................................. 25 Contacting Cirrus Logic Support For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at: http://www.cirrus.com/corporate/contacts/ CrystalClear is a trademark of Cirrus Logic, Inc. Intel is a registered trademark of Intel Corporation. OrCAD is a registered trademark of OrCAD, Inc. SoundFusion is a registered trademark of Cirrus Logic, Inc. Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirrus.com. 2 DS319RD1A1 CRD4299-1 AMR LIST OF FIGURES Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response ..................................... 10 Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range .............................................. 10 Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency ................................... 11 Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response ................................................ 11 Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range ........................................................ 12 Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency .............................................. 12 Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response ......................................... 13 Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range .................................................. 13 Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency ........................................ 14 Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency ......................................... 14 Figure 11. Block Diagram ............................................................................................................. 16 Figure 12. AMR Bus ..................................................................................................................... 17 Figure 13. Power Supplies ........................................................................................................... 18 Figure 14. CS4299 ....................................................................................................................... 19 Figure 15. Audio In ....................................................................................................................... 20 Figure 16. Audio Out .................................................................................................................... 21 Figure 17. Mic Pre-Amp ............................................................................................................... 22 Figure 18. Assembly Drawing ...................................................................................................... 23 Figure 19. Top Layer .................................................................................................................... 24 Figure 20. Bottom Layer ............................................................................................................... 25 Figure 21. Bracket Drawing .......................................................................................................... 26 LIST OF TABLES Table 1. Reference Designators ..................................................................................................... 9 Table 2. Microphone Support Specifications................................................................................... 9 Table 3. Full Duplex Specifications ................................................................................................. 9 Table 4. Analog Mixer, Line In to Line Out Specifications............................................................... 9 Table 5. Analog Mixer, Mic In to Line Out Specifications................................................................ 9 DS319RD1A1 3 CRD4299-1 AMR 1. GENERAL INFORMATION The CRD4299-1 AMR is a production-grade AMR audio card reference design using the CS4299 SoundFusion Audio Codec ‘97. The design supports the functionally compatible CS4299, CS4297A, or CS4297 AC ‘97 SoundFusion Audio Codecs. The AMR board advantage lies in the complete separation of the analog section from the noisy digital environment of a personal computer. A 5-wire digital link is all that is required to connect the audio codec to the PCI bus-based AC ‘97 controller. This allows the audio section to reach the required dynamic range of ~90 dB FS A while making the layout and placement of the audio section easier to implement. The CS4299 performs the Digital-toAnalog Conversion (DAC) for the digital audio output stream and also provides multiple analog audio inputs and outputs, analog mixing and Analog-to-Digital Conversion (ADC). This card is designed to provide the highest possible functionality, along with industry leading audio performance at a low manufacturing cost. Care was taken with component placement and signal routing to minimize sources that can degrade audio performance. Cirrus’ analog design know-how has resulted in a board that preserves the exceptional analog performance of the CS4299. dec. Digital out is provided through a Toshiba TOTX173 optical TOS-LINK jack on the board edge. There are many advantages in using a fiber optic link versus the traditional coaxial link. Fiber optic is a non-metallic insulator thereby preventing ground loops and electromagnetic interference. For signal transmission, it offers low attenuation, high bandwidth, low propagation delay, low bit error rates, small size, and cost efficiency. The signal is IEC 958 and CP-1201 compliant. 2.2 CS4299 Audio Codec ‘97 The CS4299 is a mixed-signal serial Codec based on the AC ‘97 specification revision 2.1 [1]. It is designed to be paired with a digital controller, located on the PCI bus. The AC ‘97 Controller is responsible for all communications between the CS4299 and the rest of the system. The CS4299 functions as an analog mixer, a stereo ADC, a stereo DAC, and a control and digital audio stream interface to the AC ‘97 controller. The CS4299 contains two distinct functional sections: digital and analog. The digital section includes the AC-link registers, power management support, SYNC detection circuitry, AC-link serial port interface logic, and the 24.576 MHz crystal master clock. The analog section includes the analog input multiplexer (mux), stereo input mixer, stereo output mixer, mono output mixer, stereo ADC, stereo DAC, and analog volume controls. For more information refer to the CS4299 Datasheet [3]. The capacitors required for the CS4299 and their placement are discussed in the CS4299 Datasheet [3]. Refer to the Grounding and Layout section of the data sheet for the recommended routing of the audio section. 2. REFERENCE DESIGN FEATURES The CRD4299-1 AMR reference design illustrates a high quality, low cost two-layer add-in card layout. The card is sectioned into three main parts: the AMR bus section, the CS4299 Audio Codec ‘97 section, and the Analog I/O section. 2.1 Digital Audio Out The AMR bus provides digital out in a format compatible with the consumer portion of IEC 958. An older version of this standard is also known as S/PDIF. Depending upon the codec, the SPDIF signal originates either from the AMR bus or the co4 2.2.1 Power Requirements The CS4299 requires both a digital +3.3 V and an analog +5 V supply. The digital power is supplied from the AMR bus. A voltage regulator is recommended for the analog supply. A Motorola DS319RD1A1 CRD4299-1 AMR MC78L05 regulates the AMR +12 V supply down to provide a clean +5 V analog supply for the CS4299. The MC78L05 regulator can provide adequate current, which is enough for the CS4299 and associated analog circuitry. put voltage of 1 Vrms. The Line Out connection is made via an external 1/8" jack. • Maximum output level: 1 Vrms 2.4.2 Headphone Out An external 1/8" jack is provided for a headphone connection. This output is driven by an amplifier for low impedance loads such as 32 Ω headphones. • • Maximum output level: 2.0 Vrms (no load); 1.5 Vrms (32 Ω load) Maximum output power: 70 mW/channel (32 Ω load) 2.3 Analog I/O The CS4299 has many analog inputs and outputs that may or may not be used depending on the system’s application. Unused inputs should be tied to Vrefout (pin 28) or AC coupled via a 0.1 µF capacitor to the analog ground plane. The analog section contains the components for a headphone amplifier. The Modem Audio, CD In, Audio In, and Aux In headers are also part of the Analog I/O section. The header and its associated components may or may not be necessary depending on the audio inputs implemented. 2.4.3 Line In The Line In 1/8" jack provides an input to the Line In pins of the CS4299. • Maximum input level: 2 Vrms 2.4 Audio I/O A full feature set of the CS4299’s analog I/O and digital out is represented on the reference design card through internal and external connectors: • • • • • • • • • Line Out Headphone Out Line In Mic In CD Audio In Aux In Video In Modem Audio connection Optical Digital Out 2.4.4 Mic In The Microphone In 1/8" jack provides an input to a microphone pre-amplifier circuit that applies 18 dB of gain to the signal. • Maximum input level: • Microphone Boost enabled: 12.5 mVrms Microphone Boost disabled: 125 mVrms Supports 3-pin electret (power on ring) and 2pin dynamic microphones 2.4.5 CD Audio In The CD Audio input provides a 4-pin (0.1 inch center) right-angled connector that is compatible with the SONY standards and ATAPI. • • • Maximum input level: 2 Vrms Pseudo differential input using the CD Common pin as the ground 0.1 inch connector wired as: Pin 1 : Left Channel Pin 2 : Common return Four external 1/8" jacks, one external TOS-LINK jack, and four internal header connections are used for analog and digital inputs and outputs. 2.4.1 Line Out The output of the CS4299 is capable of driving impedances greater than 10 kΩ with a maximum out- DS319RD1A1 5 CRD4299-1 AMR Pin 3 : Common return Pin 4 : Right Channel 3. SCHEMATIC DESCRIPTION Figures 11 through 17 show the schematics for the CRD4299-1 AMR card. This section will describe particular pages of the schematic that need to be discussed. 2.4.6 Aux In • • Internal 4-pin (0.1 inch center) right-angled connector Wired as: • Pin 1 : Left Channel Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Right Channel 3.1 Figure 11: Block Diagram The block diagram is an interconnection overview between schematic pages. 3.2 Figure 12: AMR Bus Interface The +5 V power pin is decoupled through C1 and supplies power for the SPDIF_OUT circuit. All ground pins are tied to digital ground except for B2, which is tied to analog ground. The AC-link, which consists of ASDOUT, ARST#, ASYNC, ASDIN, and ABITCLK, transfers digital audio data between the audio codec and the host. PC_BEEP_BUS routes the beep/speaker signal from the motherboard to the audio subsystem, for use in hearing POST codes (refer to the Intel Audio/Modem Riser Specification [2]). The PRIMARY_DN# signal indicates the presence or the absence of a primary codec on the motherboard. The MSTRCLK is the 24.576 MHz master clock for the AC ‘97 link. Populate R51 when the Codec is the primary codec. Populate R50 when the Codec is the secondary codec. The CS4297 does not support S/PDIF. Iin this case, R3 should be populated so the S/PDIF signal originates from the AMR bus. For a CS4297A/99, by populating R2 instead of R3, the S/PDIF signal originates from the codec, bypassing the AMR bus. Maximum input level: 2 Vrms 2.4.7 Video In • Internal 4-pin (0.1 inch center) right-angled connector • Pin 1 : Left Channel Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Right Channel Maximum input level: 2 Vrms 2.4.8 Modem Audio Connection The modem audio connection can be made through the internal 4-pin (0.1 inch center) right-angled connector. This connector carries both a mono input and a mono output. • Internal 4 pin header (0.1 inch center) • • • Pin 1 : Mono Out (to modem) Pin 2 : Analog Ground Pin 3 : Analog Ground Pin 4 : Phone In (from modem) 3.3 Figure 13: Power Supply The CS4299 requires both a digital +3.3 V and an analog +5 V supply. The digital power is supplied from the AMR bus. A separate regulator is recommended for the analog voltage supply to provide good audio signal quality. A Motorola MC78L05 regulates the +12 V supply from the AMR bus Maximum input level: 1 Vrms Maximum output level: 1 Vrms Minimum load impedance: 10 kΩ 6 DS319RD1A1 CRD4299-1 AMR down to a clean +5 V analog supply. Two packaging options are supported, where U5 is an SO8 surface mount package and U4 is a TO-92 pin-in-hole package. The -12 V power pin is decoupled through C73/C74, and supplies power to the headphone circuit. common return path for both the left and right channels. Therefore, the input impedance of this block is half of that of the other inputs. The modem connection is both a mono input and output. The output is fed from the CS4299’s MONO_OUT pin through a divider made of R22/23. The divider ratio is preset to 0 dB for an output voltage of 1 Vrms. If a lower output voltage is desired, the resistors can be replaced with appropriate values, as long as the total load on the output is kept greater than 10 kΩ. The input is not divided to accommodate line level sources up to 1 Vrms. 3.4 Figure 14: CS4299 AC ‘97 Audio Codec For the best audio performance, the analog voltage regulator, an MC78L05, is located near the CS4299. A 10 µF electrolytic capacitor should be added next to pins 25 and 26 if the capacitor connected to the output of the power regulator is located far away from the CS4299. All filtering capacitors of audio signals are NPO-type to ensure minimal added distortion. Two footprints are provided for the crystal: a CA-301 pin-in-hole footprint, Y1, for miniature crystal; and a short height HC-49S package, Y2. R47 is a termination resistor in the serial AC-link between the CS4299 and the AMR bus. 3.6 Figure 16: Audio Outputs The line out is driven directly by the CS4299. The headphone out amplifier, a Motorola MC1458, is capable of driving stereo headphones with impedances greater than 32 Ω or powered speakers. R37/38 are added for short-circuit protection. An optical S/PDIF (IEC 958 consumer) output is also supported. 3.5 Figure 15: Analog Inputs The inputs for AUX, VIDEO, CD, and LINE are passed through voltage dividers that reduce the levels by 6 dB to allow connection of line level sources up to 2 Vrms. The 220 pF capacitors are provided on Line_In, Mic_In, CD_In, Aux_In, Video_In, and Internal Modem connection for EMC suppression. These may be removed if EMC testing determines they are not required. 1 µF ACcoupling capacitors are used on the Line_In, Mic_In, CD_In, Aux_In, Video_In, and Internal Modem circuit to minimize the low frequency rolloff. The internal CD audio connection utilizes a pseudo-differential interface with CD_GND as the 3.7 Figure 17: Microphone Pre-amp and Bias A Motorola MC33078D low noise dual op-amp provides an +18 dB gain stage for the microphone and buffers the phantom power supply for the mic. The phantom power is derived from the +5 V analog supply and buffered by U1A to provide a maximum of 4.2 V with no load and a minimum of 2.0 V under a 0.8 mA load on the ring. Hardware rolloffs were implemented at 60 kHz and 15 kHz as recommended by the PC 99 System Design Guide, Chapter 17, Audio Components [5]. DS319RD1A1 7 CRD4299-1 AMR 3.8 Component Selection Great attention was given to the particular components on the CRD4299-1 AMR board with cost, performance, and package selection as the most important factors. Listed are some of the guidelines used in the selection of components: • • • No components smaller than 0805 package Use single package components, no resistor packs Right-angled headers for all internal connections to provide sufficient headroom for the jacks Dual footprint for XTAL. HC-49S, and small circular CA-301 pin-in-hole package Dual footprint for +5 V regulator. Surface mount and pin-in-hole package are supported. onto these pins. All data converters are highly susceptible to noise on the crystal pins. A separate chassis ground provides a reference plane for all of the EMC components. The chassis ground plane is connected to the analog ground plane at the external jacks. 4.2 CS4299 Layout Notes Please refer to the CS4299 Datasheet [3] on how the area under the chip should be partitioned and how the bypass capacitors should be placed. Pay close attention to the suggestions for the bypass capacitors on REFFLT, AFLT1, AFLT2, and the power supply capacitors. The pinout of the CS4299 is designed to keep digital and analog signals from crossing when laying out the board. • • 5. AUDIO PERFORMANCE EVALUATION In the below reference designators, the letters in parenthesis designate the full-scale value for that particular I/O.These reference designators are used in the following tables to help clarify which full-scale value applies to the particular measurement. Values referenced to digital numbers on the PC are listed with the (d) suffix. 3.9 EMC Components A number of capacitors and inductors are included to help the board meet EMC compliance tests, such as FCC Part 15. Modifying this selection of components without EMC testing could cause EMC compliance failure. 4. GROUNDING AND LAYOUT 4.1 Partitioned Voltage and Ground Planes The pinout of the CS4299 allows the ground split to completely separate digital signals on one side and analog signals on the other. This split is located very close to the CS4299 so analog and digital ground return currents originating from the CS4299 may flow through their respective ground planes. A bridge is made across the split to maintain the proper reference potential for each ground plane. The area around the crystal oscillator and the two XTAL signals is filled with copper on the top and bottom sides and attached to digital ground. This ground plane serves to keep noise from coupling 5.1 Plots In the following plots, stereo measurements have two sets of data per plot and two vertical axes. Above each vertical axis is a label indicating a channel that relates to that axis. The data set extends beyond the vertical axis to indicate its association with that axis. Using Figure 1 as an example, the top set of data extends beyond the right vertical axis, which is labeled at the top “RIGHT’, indicating that the top set of data is the right channel and associated with the right vertical axis. Likewise, the bottom set of data extends beyond the left vertical axis which is labeled at the top “LEFT”, indicating that the bottom set of data is the left channel and associated with the left vertical axis. 8 DS319RD1A1 CRD4299-1 AMR Signal Name Line In (A-D-PC-D-A) Line In (A-A) Mic In Line Out Connector Jack Jack Jack Jack Maximum Voltage 2.376 VRMS 2.142 VRMS 0.128 VRMS 1.021 VRMS Reference Designator 0 dB FS (li) 0 dB FS (li) 0 dB FS (mi) 0 dB FS (lo) Imp. (kΩ) N/A Table 1. Reference Designators Microphones Supported 3-Pin Phantom Power (power on ring) 2-Pin Dynamic 2-Pin Phantom Power (power on tip) Table 2. Microphone Support Specifications Full Duplex (A-D-PC-D-A): Line In to Line Out Dynamic Range THD+N Frequency Response -3 dB FS (li) Ac = -0.4 dB Support Yes Yes Comments Reference Left -91.4 -85.2 20-20k Right -91.4 -85.2 20-20k Units dB FS A (lo) dB FS (lo) Hz Figures 99 - 1NXL 99 - 1DXL 99 - 1MXL NOTE: TM004: combined test used in lieu of TM002 and TM003 Table 3. Full Duplex Specifications Analog Mixer (A-A): Line In to Line Out Dynamic Range THD+N Frequency Response Crosstalk -3 dB FS (li) Ac = +-0.2 dB f = 10 kHz Reference Left -95.8 -92.9 20-20k -66.8 Right -95.7 -92.9 20-20k -66.5 Units dB FS A (lo) dB FS (lo) Hz dB FS (lo) Figures 99 - 1NAL 99 - 1DAL 99 - 1MAL 99 - 1CAL Table 4. Analog Mixer, Line In to Line Out Specifications Analog Mixer (A-A): Mic In to Line Out Dynamic Range THD+N Frequency Response NOTE: Mic In is Mono Table 5. Analog Mixer, Mic In to Line Out Specifications Reference Gain = 0 dB -3 dB FS (mi) Ac = -3 dB Left -94.1 -91.3 50-15k Right N/A N/A N/A Units dB FS A (lo) dB FS (lo) Hz Figures 99 - 1NAM 99 - 1DAM 99 - 1MAM DS319RD1A1 9 CRD4299-1 AMR CwGRAPH 0.65 LEFT 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) CRD429~1\99-1MXL.ADX RIGHT 6 5 4 3 2 1 0 -1 -2 -3 -4 20 k Amplitude (dB) 100 1k Frequency (Hz) 10 k Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response CwGRAPH 0.65 LEFT -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1NXL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k Dynamic Range (dB FS A) 100 1k Frequency (Hz) 10 k Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range 10 DS319RD1A1 CRD4299-1 AMR CwGRAPH 0.65 LEFT -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1DXL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k THD+N (dB FS) 100 1k Frequency (Hz) 10 k Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency CwGRAPH 0.65 LEFT 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) CRD429~1\99-1MAL.ADX RIGHT 6 5 4 3 2 1 0 -1 -2 -3 -4 20 k Amplitude (dB) 100 1k Frequency (Hz) 10 k Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response DS319RD1A1 11 CRD4299-1 AMR CwGRAPH 0.65 LEFT -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1NAL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k Dynamic Range (dB FS A) THD+N (dB FS) 100 1k Frequency (Hz) 10 k Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range CwGRAPH 0.65 LEFT -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1DAL.ADX RIGHT -50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 20 k 100 1k Frequency (Hz) 10 k Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency 12 DS319RD1A1 CRD4299-1 AMR CwGRAPH 0.65 3 2 1 0 Amplitude (dB) -1 -2 -3 -4 -5 -6 -7 20 CrystalWare(tm) CRD429~1\99-1MAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response CwGRAPH 0.65 -60 -65 -70 Dynamic Range (dB FS A) -75 -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1NAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range DS319RD1A1 13 CRD4299-1 AMR CwGRAPH 0.65 -60 -65 -70 -75 THD+N (dB FS) -80 -85 -90 -95 -100 -105 -110 20 CrystalWare(tm) CRD429~1\99-1DAM.ADX 100 1k Frequency (Hz) 10 k 20 k Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency CwGRAPH 0.65 LEFT -70 -75 -80 -85 Crosstalk (dB) -90 -95 -100 -105 -110 -115 -120 20 CrystalWare(tm) CRD429~1\99-1CAL.ADX RIGHT -60 -65 -70 -75 -80 -85 -90 -95 -100 -105 -110 20 k Crosstalk (dB) 100 1k Frequency (Hz) 10 k Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency 14 DS319RD1A1 CRD4299-1 AMR 6. REFERENCES 1) Intel, Audio Codec ‘97 Component Specification, Revision 2.1, http://developer.intel.com/pcsupp/platform/ac97/ 2) Intel, Audio/Modem Riser Specification, Revision 1.01, Sep 10, 1998. http://developer.intel.com/pc-supp/platform/ac97/INDEX.HTM 3) Cirrus Logic, CS4299 SoundFusion Audio Codec ‘97 Data Sheet, July 1998. http://www.cirrus.com/products/overviews/ cs4299.html 4) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 1.0 http://www.cirrus.com/products/papers/ meas/meas.html 5) Intel and Microsoft, PC 99 System Design Guide http://www.microsoft.com/hwdev/desguid/ 6) M. Montrose. Printed Circuit Board Design Techniques for EMC Compliance, IEEE Press, New York: 1996. DS319RD1A1 15 PC_BEEP_BUS MSTRCLK P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT S/PDIF_CODEC AUDIO_IN P C - B E E P - BU S PC_BEEP PC_BEEP CS4299 PC_BEEP SPDIF_CODEC ABITCLK ASDOUT MSTRCL ARST# MSTRCLK P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT CD_INL CD_COM CD_INR LINE_IN_L AU X _ I N L AU X _ I N R VIDEO_L VIDEO_R CD_INL CD_COM CD_INR LINE_IN_L LINE_IN_R AU X _ I N L AU X _ I N R VIDEO_L VIDEO_R CD_INL CD_COM CD_INR LINE_IN_L LINE_IN_R AU X _ I N L AU X _ I N R VIDEO_L VIDEO_R S/PDIF_CODEC PHONE_IN MONO_OUT PHONE_IN MONO_OUT MIC1 AUDIO_MICIN Figure 11. Block Diagram MIC1 16 AMR_BUS PC_BEEP_BUS S/PDIF_OUT SPDIF_OUT 7. SCHEMATIC, LAYOUT, AND BRACKET DRAWINGS AUDIO_OUT LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R LINE_OUT_R LINE_OUT_L A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R PHONE_IN MONO_OUT CRD4299-1 AMR POWE R DS319RD1A1 1 +5VD +12VD B8 B9 B10 B11 GND +12V GND +5VD USB_OC# GND USB+ USB- A8 A9 A10 A11 R2 0 S/PDIF_CODEC CGND KEY KEY B12 B13 B14 B15 B16 ASDOUT ARST# B17 B18 B19 B20 B21 B22 MSTRCLK B23 GND RSVD RSVD +3.3VD GND AC 9 7 _ S DATA _ O U T AC 9 7 _ R E S E T # AC 9 7 _ S DATA _ I N 3 GND AC 9 7 _ S DATA _ I N 2 GND AC 9 7 _ M S T R C L K A M R C O N N E C TO R DGND KEY KEY GND S/PDIF_IN GND +3.3Vdual/+3.3VSB GND AC 9 7 _ S Y N C GND AC 9 7 _ S DATA _ I N 1 GND AC 9 7 _ S DATA _ I N 0 GND AC 9 7 _ B I T C L K A12 R3 A13 A14 A15 A16 A17 A18 A19 A20 R50 47 ASYNC 0 populate R2 for C S 4 2 99 board S/PDIF_OUT populate R3 for CS429 7 board populate R51 if primar y c odec. 1 DS319RD1A1 P1 B1 B2 PC_BEEP_BUS AGND -12VD B5 P R I M A RY _ D N # +3.3VD B6 B7 B3 B4 +3.3VD +5VD AMR BUS AU D I O _ P W R D N MONO_PHONE RSVD RSVD RSVD GND +5Vdual/+5VSB A1 A2 DGND A3 A4 C2 0.1uF Z5U + C3 10uF ELEC + C1 10uF ELEC AU D I O _ M U T E # GND MONO_OUT/PC_BEEP RSVD RSVD P R I M A RY _ D N # -12V DGND HOLE A5 A6 A7 M1 HOLE M2 TO O L H O L E M3 CRD4299-1 AMR A21 A22 A23 R51 47 ASDIN populate R50 if s e c o n d a r y c odec. ABITCLK DGND Figure 12. AMR Bus 17 3 3 1 @ 1 0 0 M Hz + C70 100uF ELEC C71 0.1uF Z5U IN GND OUT 1 U4 PIN IN HOLE P O P U L AT I O N OPTION + C72 10uF ELEC 2 MC78L05 AGND AGND Connect AGND to DGND with a 50 mil trace near the 4297 Connect CGND to DGND with a 50 mil trace near the finger edge of the board. Figure 13. Power Supplies + 18 POWER SUPPLIES Do not populate U5 MC78L05ACD U5 5 6 7 AGND 8 +12VA +12VD L2 +5VA NC2 GND3 GND4 VIN NC1 GND2 GND1 VO U T 4 3 2 AGND 1 3 1 @ 1 0 0 M Hz C73 100uF ELEC C74 0.1uF Z5U S U R FAC E M O U N T P O P U L AT I O N OPTION -12VD L1 -12VA CRD4299-1 AMR DS319RD1A1 A LT _ L I N E _ O U T _ L UT_R LINE_OUT_R LINE_OUT_ L M O N O _OUT DS319RD1A1 +3.3VD +5VA 25 38 C59 NPO 1000pF PC_BEEP PHONE_IN AU X _INL AU X _ I N R V I D E O _L VIDEO_R CD_INL CD_COM CD_INR MIC1 LINE_IN_L LINE_IN_R 1 9 12 13 14 15 16 17 18 19 20 21 22 23 24 28 27 29 30 32 33 34 D o n o t p o p u late C 6 2 a n d C 6 3 fo r C S 4 2 97. 2 3 U3 AV d d 1 AV d d 2 DV d d 1 DV d d 2 PC_BEEP PHONE AU X _ L AU X _ R VIDEO_L VIDEO_R CD_L CD_GND CD_R MIC1 MIC2 LINE_IN_L LINE_IN_R Vrefout R E F F LT A F LT 1 A F LT 2 F LT 3 D FLTI F LTO XTL_IN XTL_OUT CS 4299 AV s s 1 AV s s 2 DV s s 1 DV s s 2 BIT_CLK S DATA _ O U T S DATA _ I N SYNC RESET# LINE_OUT_L LINE_OUT_R A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R MONO_OUT S/PDIF_OUT EAPD ID0# ID1# BCFG nc5 nc6 nc7 26 42 4 7 6 5 8 10 11 35 36 39 41 37 48 47 45 46 31 40 43 44 R48 0 R47 47 ABITCLK AS DOUT ASDIN ASYNC ARST# AGND C55 NPO 1000pF C56 NPO 1000pF C57 NPO 1000pF +5VA C58 NPO 1000pF +3.3VD AGND C51 Z5U 0.1uF C52 Z5U 0.1uF DGND C53 Z5U 0.1uF C54 Z5U 0.1uF LINE_OUT_L LINE_OUT _R ALT_LINE_OUT_L A LT _ LINE_OUT_R MONO_OU T S/PDIF_CODEC P R I M A RY _ D N # DGND AGND C64 X7R 1uF C65 Z5U 0.1uF C66 X7 R 1uF C67 Z5U 0.1uF C68 NPO 1000pF C69 NPO 1 0 00pF C63 X7 R 0.01uF C62 NPO 1000pF AGND Do not popul ate R48 AGND Do not popul ate R45 MSTRCLK R45 0 AGND layout Y1 on t op of Y2 -populate only o ne XTAL Y1 24. 576 MHz Y2 CRD4299-1 AMR 24. 576 MHz C60 2 2 pF NPO C61 2 2 pF NPO DGND DGND Figure 14. CS4299 19 20 LINE IN J4 4 3 5 2 1 C21 PHONO-1/8 220pF 220pF C22 AGND R16 R17 6.8K 6.8K C15 1uF X7R LINE_IN_R CD IN R J1 4 3 2 1 AGND R8 R9 6.8K 6.8K C8 1uF R4 R7 6.8K 6.8K C4 1uF CD_INR X7R R20 R21 6.8K 6.8K C25 1uF X7R GND LINE_IN_L GND L AGND CGND CD_INL 4 X 1 H D R - AU X7R AU X IN J3 AGND R14 R15 R18 AGND AGND R19 C23 220pF C24 220pF 6.8K 6.8K 220pF 220pF 220pF AGND C20 1uF X7R +5VA 6.8K 6.8K C14 1uF X7R R12 C16 C17 C18 R13 3.4K 3.4K C13 1uF X7R R GND GND L 4 3 2 1 AU X _ I N R CD_COM AU X _ I N L 4 X 1 H D R - AU AGND AGND PC SPEAKER IN R5 R6 R10 AGND R11 6.8K 6.8K 6.8K C5 1uF X7R VIDEO_R PC-BEEP-BUS 3 1 @ 1 0 0 M Hz L3 R53 47K R52 Do not p o pulate R52 4.7K Z5U 0.1uF VID EO IN J2 R GND GND L 4 3 2 1 C10 AGND 220pF 220pF C11 C26 R31 C75 2700pF X7R 4.7K PC_BEEP 6.8K C9 1uF X7R VIDEO_L AGND AGND 4 X 1 H D R - AU AGND INTERNAL MODEM CONNECTION J5 PHONE IN GND GND MONO OUT 4 3 2 C12 1 220pF C19 220pF 47K 47K R23 R24 R22 0 C28 C29 X7R 1uF 1uF X7R PHONE_IN CRD4299-1 AMR MONO_OUT Connect CGND to AGND at the jack 4 X 1 H D R - AU AGND AGND AGND AGND DS319RD1A1 Figure 15. Audio In DS319RD1A1 +5VA +5VA U1A +5VA 1 + R26 68K MC33078D 3 2 R27 + C31 10uF ELEC 47K AGND AGND 47K R25 place close to pins 8 and 4 C30 0.1uF Z5U AGND R28 R29 AGND 100K J6 4 3 5 2 1 C35 PHONO-1/8 R32 2.7K AGND C33 X7R 0.068 uF 6.8K 47K +5VA U1B MC33078D 5 6 + 7 C34 1uF X7R MIC1 C36 220pF + C37 10uF ELEC R33 Connect CGND to the jack AGND 220pF CRD4299-1 AMR CGND AGND C38 220pF 47K AGND R34 Figure 16. Audio Out 21 C40 + ALT_LINE_OUT _R 10uF R35 27K 8 AGND NPO 22pF C43 R40 C42 + ALT_LINE_O UT_L 10uF 4 R39 27K 8 AGND C46 LIN E _ O U T _ R + 10uF J9 4 3 5 2 1 R43 R44 C48 100K 100K 220p F C49 P H O N O-1/8 220p F ELEC C47 LIN E _ O U T _ L + 10uF ELEC AGND + ELEC 5 - 6 + ELEC 3 - 2 4 22 C41 R36 NPO 22pF 56K -12VA 1 +12VA U2A M C 1458 R37 1/4W 4 3 5 2 1 C44 220p F C45 220p F P H O N O-1/8 10 H E A D P H O N E JACK J7 R38 56K 1/4W -12VA 10 7 +12VA U2B M C 1458 CGND AGND Connect CGND to AGND at the jack SPDIF_OUT Digital Output J10 5 4 +5VD 3 C50 0.1u F Z5U R49 8.2K 2 1 6 DGND LINE OUT JAC K DGND TOTX -173 DGND CRD4299-1 AMR Connect CGND to AGND at the jack AGND CGND DS319RD1A1 Figure 17. Mic Pre-Amp DS319RD1A1 CRD4299-1 AMR Figure 18. Assembly Drawing 23 CRD4299-1 AMR 24 DS319RD1A1 Figure 19. Top Layer CRD4299-1 AMR DS319RD1A1 Figure 20. Bottom Layer 25 26 CRD4299-1 AMR DS319RD1A1 Figure 21. Bracket Drawing 8. BILL OF MATERIALS CRD4299-AMR Item Qty 1 2 9 12 DS319RD1A1 27 Reference C1,C3,C31,C37,C40,C42, C46,C47,C72 Value 10uF ELEC Z5U Type PCB Footprint CSP_ELEC_B CSN_0805 Mnfr Part Number Description ALUM ELEC, 10uF, 20%, 16V,POL PANASONIC ECA-1CM100 KEMET C2,C26,C30,C50,C51,C52, 0.1uF C53,C54,C65,C67,C71, C74 C4,C5,C8,C9,C13,C14, C15,C20,C25,C28,C29, C34,C64,C66 C10,C11,C12,C16,C17, C18,C19,C21,C22,C23, C24,C35,C36,C38,C44, C45,C48,C49 C33 C41,C43,C60,C61 C55,C56,C57,C58,C59, C62,C68,C69 C63 C70,C73 C75 J1,J2,J3,J5 J4,J6,J7,J9 J10 L1,L2,L3 M1,M2 M3 P1 R2,R22 R4,R5,R6,R7,R8,R9,R10, R11,R14,R15,R16,R17, R18,R19,R20,R21,R33 R12,R13 R23,R24,R25,R27,R29, R34,R53 R26 1uF C0805C104M5UAC CAP, 0805, Z5U, .1uF, 20%, 50V 3 14 X7R CSN_1206 VENKEL C1206X7R500105KNE CAP, 1206, X7R, 1uF, 10%, 25V 4 18 220pF COG SMT_0805 KEMET C0805C221J5GAC CERM CAP,220pF,5%,50V,COG 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 1 4 8 1 2 1 4 4 1 3 2 1 1 2 17 0.068 uF 22pF 1000pF 0.01uF 100uF 2700pF 4X1HDR-AU PHONO-1/8 TOTX-173 31@100MHz HOLE TOOLHOLE AMR CONNECTOR 0 6.8K X7R NPO NPO X7R ELEC X7R CSN_0805 CSN_0805 SMT_0805 CSN_0805 CSP_ELEC_E CSN_0805 CON_MLX_70553 KEMET KEMET KEMET KEMET KEMET MOLEX C0805C683K5RAC CAP, 0805, X7R, 68000pF, 10%, 50V C0805C220J5GAC CAP, 0805, C0G, 22pF, 5%, 50V C0805C102J5GAC CERM CAP, 1000pF, 5%, 50V,COG C0805C103K5RAC CERM CAP, .01uF, 10%, 50V,X7R CAP, SMT E, ELEC, 100uF, 20%, 16V HDR, 4X1, 0.025" PIN, 0.1" CTR, 15u" AU CONN, 1/8" DOUBLE SW. STEREO PHONE JACK OPTICAL TOSLINK TRANSMITTER C0805C272K5RAC CAP, 0805, X7R, 2700pF, 10%, 50V 70553-0003 SJ372 TOTX173 PANASONIC ECE-V1CA101P CON_STEREO_LZR LZR ELECTRONICS TOTX173 FERRITE IND_FB1206 TOOLHOLE AMR5V-46 TOSHIBA TDK HF50ACB321611-T IND, FBEAD, 1206, 31@100MHz, 25% CRD4299-1 AMR RES RES RES_0805 RES_0805 PHILIPS PHILIPS 9C08052A0R00J 9C08052A6801F RES, SO, 0805, 0, 5%, 1/10W, METAL FILM RES, SO, 0805, 6.8K, 1%, 1/10W, METAL FILM RES, SO, 0805, 3.4K, 1%, 1/10W, METAL FILM RES, SO, 0805, 47K, 5%, 1/10W, METAL FILM RES, SO, 0805, 68K, 5%, 1/10W, METAL FILM 20 21 22 2 7 1 3.4K 47K 68K RES RES RES RES_0805 RES_0805 RES_0805 PHILIPS PHILIPS PHILIPS 9C08052A3401F 9C08052A4702J 9C08052A6802J 28 DS319RD1A1 Item Qty 23 24 25 26 27 28 29 30 31 32 33 34 35 3 1 1 2 2 2 2 1 1 1 1 1 1 Reference R28,R43,R44 R31 R32 R35,R39 R36,R40 R37,R38 R47,R51 R49 U1 U2 U3 U4 Y1 Value 100K 4.7K 2.7K 27K 56K 10 47 8.2K MC33078D MC1458 CS4299 MC78L05 24.576 MHz RES RES RES RES RES RES RES RES Type PCB Footprint RES_0805 RES_0805 RES_0805 RES_0805 RES_0805 RES_1206 RES_0805 RES_1206 SO8 SO8 QFP48_7X7 TO-92 Mnfr PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS PHILIPS Philips Part Number 9C08052A1003J 9C08052A4701J 9C08052A2701J 9C08052A2702J 9C08052A5602J 9C12063A10R0J 9C08052A47R0J 9C12063A820J Description RES, SO, 0805, 100K, 5%, 1/10W, METAL FILM RES, SO, 0805, 4.7K, 5%, 1/10W, METAL FILM RES, SO, 0805, 2.7K, 5%, 1/10W, METAL FILM RES,27K,SO,0805,5%,1/10W,METAL FILM RES,56K,SO,0805,5%,1/10W,METAL FILM RES, SO, 1206, 10, 5%, 1/4W, METAL FILM RES, SO, 0805, 47, 5%, 1/10W, METAL FILM RES,8.2k,SM1206,5%,1/4W IC, SO, SOIC8, 33078, DUAL OP AMP DUAL HEADPHONE AMP IC, TQFP, AC ’97 2.1 SERIAL CODEC W/ SRC 5V POS.VOLT.REG., 100ma XTAL, 24.576MHz, HC49S, Fund Mode, Par Res DUAL OP AMP DUAL HP OP AMP IC V REG MOTOROLA MC33078D MOTOROLA MC1458 CRYSTAL CS4299-KQ SEMICOND. MOTOROLA MC78L05AC FOX FS24.576 PAR RES, FUND XTL_HC49S Do Not Populate 1 2 3 5 6 1 1 2 1 1 R50 R52 R45,R48,R3 Y2 U5 47 4.7K 0 24.576 MHz RES RES RES RES_0805 RES_0805 RES_0805 PHILIPS PHILIPS PHILIPS EPSON 9C08052A47R0J 9C08052A4701J 9C08052A0R00J RES, SO, 0805, 47, 5%, 1/10W, METAL FILM RES, SO, 0805, 4.7K, 5%, 1/10W, METAL FILM RES, SO, 0805, 0, 5%, 1/10W, METAL FILM PAR RES, FUND XTL_CA301 SO8 CA-301_24.576M-C XTAL, 24.576MHz, CA-301, Fund Mode, Par Res 5V POS. VOLT. REG., 100ma MC78L05ACD V REG MOTOROLA MC78L05ACD CRD4299-1 AMR • Notes •