CRD4299-1 AMR CrystalClear™ AC '97 AMR Reference Design Features Description l AMR 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. 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. 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 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 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. 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. 2.1 Digital Audio Out 2.2.1 Power Requirements 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 co- 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 2. REFERENCE DESIGN FEATURES 4 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. 2.3 Analog I/O 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. 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. • Maximum output level: 1 Vrms 2.4.2 Headphone Out • Maximum output level: 2.0 Vrms (no load); 1.5 Vrms (32 Ω load) • Maximum output power: 70 mW/channel (32 Ω load) 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 2.4.4 Mic In 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: The Microphone In 1/8" jack provides an input to a microphone pre-amplifier circuit that applies 18 dB of gain to the signal. • Line Out • • Headphone Out - Microphone Boost enabled: 12.5 mVrms • Line In - Microphone Boost disabled: 125 mVrms • Mic In • CD Audio In • Aux In 2.4.5 CD Audio In • Video In • Modem Audio connection • Optical Digital Out 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: Supports 3-pin electret (power on ring) and 2pin dynamic microphones Four external 1/8" jacks, one external TOS-LINK jack, and four internal header connections are used for analog and digital inputs and outputs. • Maximum input level: 2 Vrms • Pseudo differential input using the CD Common pin as the ground 2.4.1 Line Out • 0.1 inch connector wired as: The output of the CS4299 is capable of driving impedances greater than 10 kΩ with a maximum out- DS319RD1A1 - Pin 1 : Left Channel - Pin 2 : Common return 5 CRD4299-1 AMR - Pin 3 : Common return 3. SCHEMATIC DESCRIPTION - Pin 4 : Right Channel 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 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) • Maximum input level: 1 Vrms • Maximum output level: 1 Vrms • Minimum load impedance: 10 kΩ 6 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. 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 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. 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. 3.5 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 DS319RD1A1 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. 3.6 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. 3.7 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]. 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: 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. • No components smaller than 0805 package 4.2 CS4299 Layout Notes • 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 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. • Dual footprint for +5 V regulator. Surface mount and pin-in-hole package are supported. 3.9 EMC Components 5. AUDIO PERFORMANCE EVALUATION 4. GROUNDING AND LAYOUT 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. 4.1 Partitioned Voltage and Ground Planes 5.1 Plots 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. 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. 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. 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 8 DS319RD1A1 CRD4299-1 AMR Signal Name Connector Maximum Voltage Reference Designator Line In (A-D-PC-D-A) Jack 2.376 VRMS 0 dB FS (li) Line In (A-A) Jack 2.142 VRMS 0 dB FS (li) Mic In Jack 0.128 VRMS 0 dB FS (mi) Line Out Jack 1.021 VRMS 0 dB FS (lo) Imp. (kΩ) N/A Table 1. Reference Designators Microphones Supported Support 3-Pin Phantom Power (power on ring) Yes 2-Pin Dynamic Yes Comments 2-Pin Phantom Power (power on tip) Table 2. Microphone Support Specifications Full Duplex (A-D-PC-D-A): Line In to Line Out Reference Dynamic Range Left Right Units Figures -91.4 -91.4 dB FS A (lo) 99 - 1NXL THD+N -3 dB FS (li) -85.2 -85.2 dB FS (lo) 99 - 1DXL Frequency Response Ac = -0.4 dB 20-20k 20-20k Hz 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 Reference Left Right Units Figures -95.8 -95.7 dB FS A (lo) 99 - 1NAL -3 dB FS (li) -92.9 -92.9 dB FS (lo) 99 - 1DAL Ac = +-0.2 dB 20-20k 20-20k Hz 99 - 1MAL f = 10 kHz -66.8 -66.5 dB FS (lo) 99 - 1CAL Dynamic Range THD+N Frequency Response Crosstalk 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 Reference Left Right Units Figures Gain = 0 dB -94.1 N/A dB FS A (lo) 99 - 1NAM -3 dB FS (mi) -91.3 N/A dB FS (lo) 99 - 1DAM Ac = -3 dB 50-15k N/A Hz 99 - 1MAM NOTE: Mic In is Mono Table 5. Analog Mixer, Mic In to Line Out Specifications DS319RD1A1 9 CRD4299-1 AMR CwGRAPH 0.65 CrystalWare(tm) CRD429~1\99-1MXL.ADX RIGHT 6 2 5 1 4 0 3 -1 2 -2 1 -3 0 -4 -1 -5 -2 -6 -3 -7 20 100 1k Frequency (Hz) 10 k Amplitude (dB) Amplitude (dB) LEFT 3 -4 20 k Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response LEFT -60 CRD429~1\99-1NXL.ADX RIGHT -50 -65 -55 -70 -60 -75 -65 -80 -70 -85 -75 -90 -80 -95 -85 -100 -90 -105 -95 -110 20 100 1k Frequency (Hz) 10 k Dynamic Range (dB FS A) CrystalWare(tm) Dynamic Range (dB FS A) CwGRAPH 0.65 -100 20 k Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range 10 DS319RD1A1 CRD4299-1 AMR LEFT -60 CRD429~1\99-1DXL.ADX RIGHT -50 -65 -55 -70 -60 -75 -65 -80 -70 -85 -75 -90 -80 -95 -85 -100 -90 -105 -95 -110 20 100 1k Frequency (Hz) 10 k THD+N (dB FS) CrystalWare(tm) THD+N (dB FS) CwGRAPH 0.65 -100 20 k Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency CrystalWare(tm) Amplitude (dB) LEFT 3 CRD429~1\99-1MAL.ADX RIGHT 6 2 5 1 4 0 3 -1 2 -2 1 -3 0 -4 -1 -5 -2 -6 -3 -7 20 100 1k Frequency (Hz) 10 k Amplitude (dB) CwGRAPH 0.65 -4 20 k Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response DS319RD1A1 11 CRD4299-1 AMR LEFT -60 CRD429~1\99-1NAL.ADX RIGHT -50 -65 -55 -70 -60 -75 -65 -80 -70 -85 -75 -90 -80 -95 -85 -100 -90 -105 -95 -110 20 100 1k Frequency (Hz) 10 k Dynamic Range (dB FS A) CrystalWare(tm) Dynamic Range (dB FS A) CwGRAPH 0.65 -100 20 k Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range LEFT -60 CRD429~1\99-1DAL.ADX RIGHT -50 -65 -55 -70 -60 -75 -65 -80 -70 -85 -75 -90 -80 -95 -85 -100 -90 -105 -95 -110 20 100 1k Frequency (Hz) 10 k THD+N (dB FS) CrystalWare(tm) THD+N (dB FS) CwGRAPH 0.65 -100 20 k Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency 12 DS319RD1A1 CRD4299-1 AMR CwGRAPH 0.65 CrystalWare(tm) CRD429~1\99-1MAM.ADX 3 2 1 Amplitude (dB) 0 -1 -2 -3 -4 -5 -6 -7 20 100 1k Frequency (Hz) 10 k 20 k Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response CwGRAPH 0.65 CrystalWare(tm) CRD429~1\99-1NAM.ADX -60 -65 Dynamic Range (dB FS A) -70 -75 -80 -85 -90 -95 -100 -105 -110 20 100 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 CrystalWare(tm) CRD429~1\99-1DAM.ADX -60 -65 -70 THD+N (dB FS) -75 -80 -85 -90 -95 -100 -105 -110 20 100 1k Frequency (Hz) 10 k 20 k Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency LEFT -70 CRD429~1\99-1CAL.ADX RIGHT -60 -75 -65 -80 -70 -85 -75 -90 -80 -95 -85 -100 -90 -105 -95 -110 -100 -115 -105 -120 20 100 1k Frequency (Hz) 10 k Crosstalk (dB) CrystalWare(tm) Crosstalk (dB) CwGRAPH 0.65 -110 20 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 LINE_IN_L AU X _ I N L AU X _ I N R VIDEO_L VIDEO_R PHONE_IN MONO_OUT 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 PHONE_IN MONO_OUT PC_BEEP CD_INL CD_COM CD_INR S/PDIF_CODEC SPDIF_CODEC ASDOUT ABITCLK MSTRCLK P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT LINE_IN_L LINE_IN_R AUDIO_OUT LINE_OUT_R LINE_OUT_L AU X _ I N L AU X _ I N R A LT _ L I N E _ O U T _ L A LT _ L I N E _ O U T _ R VIDEO_L VIDEO_R PHONE_IN MONO_OUT SPDIF_OUT S/PDIF_CODEC CD_INL CD_COM CD_INR PC_BEEP MSTRCLK P R I M A RY _ D N # ARST# ASYNC ABITCLK ASDIN ASDOUT PC_BEEP CS4299 S/PDIF_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 MIC1 P C - B E E P - BU S AUDIO_IN MSTRCL PC_BEEP_BUS ARST# PC_BEEP_BUS 7. SCHEMATIC, LAYOUT, AND BRACKET DRAWINGS 16 AMR_BUS MIC1 DS319RD1A1 AUDIO_MICIN Figure 11. Block Diagram CRD4299-1 AMR POWE R DS319RD1A1 +3.3VD +5VD AGND B1 AU D I O _ M U T E # B2 GND B3 AU D I O _ P W R D N A1 MONO_PHONE A2 MONO_OUT/PC_BEEP RSVD A3 B4 RSVD RSVD A4 B5 RSVD RSVD A5 B6 P R I M A RY _ D N # GND A6 -12VD P R I M A RY _ D N # +3.3VD +5VD +12VD -12V +5Vdual/+5VSB B8 GND USB_OC# A8 B9 +12V GND A9 B10 GND USB+ A10 USB- A11 ASDOUT ARST# KEY KEY KEY GND A12 RSVD S/PDIF_IN A13 B14 RSVD GND A14 B15 +3.3VD +3.3Vdual/+3.3VSB A15 B16 GND GND A16 B17 AC 9 7 _ S DATA _ O U T AC 9 7 _ S Y N C A17 B18 AC 9 7 _ R E S E T # GND A18 B19 AC 9 7 _ S DATA _ I N 3 AC 9 7 _ S DATA _ I N 1 A19 B20 GND GND A20 B21 AC 9 7 _ S DATA _ I N 2 AC 9 7 _ S DATA _ I N 0 A21 GND A22 AC 9 7 _ B I T C L K A23 AC 9 7 _ M S T R C L K R3 0 S/PDIF_OUT populate R3 for CS429 7 board ASYNC R50 47 R51 47 ABITCLK A M R C O N N E C TO R DGND 0 S/PDIF_CODEC B13 GND CGND populate R2 for C S 4 2 99 board GND B23 TO O L H O L E M2 M3 R2 B12 B22 HOLE M1 DGND Figure 12. AMR Bus populate R51 if primar y codec. ASDIN populate R50 if s e c o n d a ry codec. 17 CRD4299-1 AMR MSTRCLK KEY DGND HOLE A7 +5VD + C1 10uF ELEC DGND B7 B11 + C3 10uF ELEC C2 0.1uF Z5U 1 PC_BEEP_BUS AMR BUS 1 P1 18 POWER SUPPLIES MC78L05ACD Do not populate U5 U5 5 NC2 6 7 AGND 8 NC1 4 GND3 GND2 3 GND4 GND1 2 VIN VO U T 1 S U R FAC E M O U N T P O P U L AT I O N OPTION -12VA -12VD L1 AGND 3 1 @ 1 0 0 M Hz +12VA +5VA L2 OUT IN 3 1 @ 1 0 0 M Hz + C70 100uF ELEC C71 0.1uF Z5U 2 GND 3 PIN IN HOLE P O P U L AT I O N OPTION 1 + +12VD C73 100uF ELEC C74 0.1uF Z5U U4 MC78L05 + C72 10uF ELEC AGND AGND DS319RD1A1 Figure 13. Power Supplies CRD4299-1 AMR 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. C56 NPO 1000pF UT_R A LT _ L I N E _ O U T _ L M O N O _OUT LINE_OUT_ L LINE_OUT_R DS319RD1A1 C55 NPO 1000pF C57 NPO 1000pF +3.3VD +3.3VD +5VA C58 NPO 1000pF 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 +5VA AGND C51 Z5U 0.1uF C52 Z5U 0.1uF DGND C64 X7R 1uF C65 Z5U 0.1uF C53 Z5U 0.1uF C54 Z5U 0.1uF LINE_IN_L LINE_IN_R AGND C66 X7R 1uF C67 Z5U 0.1uF C68 NPO 1000pF C69 NPO 1 0 00pF AGND Do not popul ate R45 MSTRCLK R45 0 C63 X7R 0.01uF C62 NPO 1000pF 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. U3 CS4299 25 38 AV d d 1 AV d d 2 AV s s 1 AV s s 2 26 42 1 9 DV d d 1 DV d d 2 DV s s 1 DV s s 2 4 7 12 13 14 15 16 17 18 19 20 21 22 23 24 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 28 27 29 30 32 33 34 Vrefout R E F F LT A F LT 1 A F LT 2 F LT 3 D FLTI F LTO 2 3 XTL_IN XTL_OUT AGND AGND R47 47 BIT_CLK S DATA _ O U T S DATA _ I N SYNC RESET# 6 5 8 10 11 LINE_OUT_L LINE_OUT_R 35 36 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 39 41 ALT_LINE_OUT_L A LT _ LINE_OUT_R MONO_OUT 37 MONO_OU T S/PDIF_OUT EAPD 48 47 S/PDIF_CODEC ID0# ID1# 45 46 P R I M A RY _ D N # BCFG nc5 nc6 nc7 31 40 43 44 R48 ABITCLK AS DOUT ASDIN ASYNC ARST# DGND 0 AGND Do not popul ate R48 layout Y1 on top of Y2 -populate only o ne XTAL Y1 Y2 24. 576 MHz C60 2 2 pF NPO DGND C61 2 2 pF NPO DGND Figure 14. CS4299 19 CRD4299-1 AMR 24. 576 MHz 20 LINE IN R16 4 3 5 2 1 R17 J4 6.8K C15 1uF LINE_IN_R CD IN X7R 6.8K 4 R4 6.8K GND 3 R7 6.8K GND 2 L 1 R8 6.8K R J1 C4 1uF CD_INR X7R C21 C22 220pF 220pF AGND R20 6.8K R21 6.8K PHONO-1/8 C25 1uF LINE_IN_L X7R AGND CGND AGND C8 1uF CD_INL X7R 4 X 1 H D R - AU AU X IN R9 6.8K R12 3.4K AGND J3 R14 4 R 6.8K C14 1uF AU X _ I N R X7R GND 3 GND 2 R15 6.8K R18 6.8K C16 C17 220pF 1uF CD_COM X7R R13 220pF C13 C18 3.4K 220pF AGND AGND AGND R19 1 L 4 X 1 H D R - AU AGND C23 C24 220pF 220pF 6.8K C20 1uF AU X _ I N L X7R +5VA R52 PC SPEAKER IN AGND Do not p o pulate R52 VIDEO IN 4.7K J2 R 4 R5 6.8K GND 3 R6 6.8K GND 2 L 1 C5 1uF R10 6.8K R11 6.8K L3 VIDEO_R 3 1 @ 1 0 0 M Hz C10 C11 220pF 220pF 47K C26 Z5U 0.1uF PC_BEEP R31 C75 2700pF X7R 4.7K AGND 4 X 1 H D R - AU R53 PC-BEEP-BUS X7R C9 1uF VIDEO_L X7R AGND AGND AGND AGND INTERNAL MODEM CONNECTION 4 X7R 1uF GND 3 GND 2 R22 0 C29 1uF PHONE_IN MONO_OUT X7R MONO OUT 1 C12 C19 220pF 220pF 4 X 1 H D R - AU AGND AGND R23 R24 47K 47K AGND Connect CGND to AGND at the jack AGND DS319RD1A1 Figure 15. Audio In CRD4299-1 AMR C28 J5 PHONE IN DS319RD1A1 +5VA R25 +5VA U1A + MC33078D 3 - 2 +5VA 1 C30 0.1uF Z5U place close to pins 8 and 4 47K R27 + C31 10uF ELEC R26 47K 68K AGND AGND AGND R28 R29 100K 47K AGND +5VA J6 R32 4 3 5 2 1 2.7K U1B AGND C35 C36 R33 C33 X7R 0.068 uF 5 + 6.8K 6 - MC33078D PHONO-1/8 220pF Connect CGND to the jack CGND C34 1uF MIC1 X7R 220pF + C37 10uF ELEC AGND C38 R34 AGND Figure 16. Audio Out 220pF 47K 21 CRD4299-1 AMR AGND 7 22 C41 NPO 22pF R36 56K + R35 27K 2 3 + 10uF - C40 ALT_LINE_OUT _R 4 -12VA 1 ELEC U2A R37 10 8 +12VA M C 1458 AGND C43 H E A D P H O N E JACK 1/4W J7 4 3 5 2 1 NPO 22pF R38 R40 10 56K 1/4W C44 C45 -12VA + 10uF R39 27K 6 ALT_LINE_O UT_L - C42 220p F 4 220p F 7 5 AGND CGND Connect CGND to AGND at the jack + ELEC P H O N O-1/8 Digital Output SPDIF_OUT J10 U2B 8 +12VA 5 M C 1458 AGND 4 +5VD DGND 3 LIN E _ O U T _ R 10uF J9 ELEC 10uF ELEC R43 R49 8.2K 2 1 6 LINE OUT JAC K 4 3 5 2 1 + C47 LIN E _ O U T _ L C50 0.1u F Z5U + C46 TOTX -173 DGND DGND R44 C48 C49 220p F 220p F P H O N O-1/8 AGND 100K CGND Connect CGND to AGND at the jack AGND DS319RD1A1 Figure 17. Mic Pre-Amp CRD4299-1 AMR 100K DS319RD1A1 23 CRD4299-1 AMR Figure 18. Assembly Drawing 24 CRD4299-1 AMR DS319RD1A1 Figure 19. Top Layer DS319RD1A1 25 CRD4299-1 AMR Figure 20. Bottom Layer 26 CRD4299-1 AMR DS319RD1A1 Figure 21. Bracket Drawing DS319RD1A1 8. BILL OF MATERIALS CRD4299-AMR Item Qty Reference 1 9 C1,C3,C31,C37,C40,C42, C46,C47,C72 2 12 3 Value 10uF Type PCB Footprint Mnfr Part Number Description ELEC CSP_ELEC_B PANASONIC ECA-1CM100 C2,C26,C30,C50,C51,C52, 0.1uF C53,C54,C65,C67,C71, C74 Z5U CSN_0805 KEMET C0805C104M5UAC CAP, 0805, Z5U, .1uF, 20%, 50V 14 C4,C5,C8,C9,C13,C14, C15,C20,C25,C28,C29, C34,C64,C66 1uF X7R CSN_1206 VENKEL C1206X7R500105KNE 4 18 C10,C11,C12,C16,C17, C18,C19,C21,C22,C23, C24,C35,C36,C38,C44, C45,C48,C49 220pF COG SMT_0805 KEMET C0805C221J5GAC CERM CAP,220pF,5%,50V,COG 5 1 C33 0.068 uF X7R CSN_0805 KEMET C0805C683K5RAC CAP, 0805, X7R, 68000pF, 10%, 50V 6 4 C41,C43,C60,C61 22pF NPO CSN_0805 KEMET C0805C220J5GAC CAP, 0805, C0G, 22pF, 5%, 50V 7 8 C55,C56,C57,C58,C59, C62,C68,C69 1000pF NPO SMT_0805 KEMET C0805C102J5GAC CERM CAP, 1000pF, 5%, 50V,COG 8 1 C63 0.01uF X7R CSN_0805 KEMET C0805C103K5RAC CERM CAP, .01uF, 10%, 50V,X7R 9 2 C70,C73 100uF ELEC CSP_ELEC_E PANASONIC ECE-V1CA101P 10 1 C75 2700pF X7R CSN_0805 KEMET 11 4 J1,J2,J3,J5 4X1HDR-AU CON_MLX_70553 MOLEX 12 4 J4,J6,J7,J9 PHONO-1/8 CON_STEREO_LZR LZR ELECTRONICS 13 1 J10 TOTX-173 14 3 L1,L2,L3 31@100MHz 15 2 M1,M2 HOLE 16 1 M3 TOOLHOLE TOOLHOLE 17 1 P1 AMR CONNECTOR AMR5V-46 FERRITE ALUM ELEC, 10uF, 20%, 16V,POL CAP, 1206, X7R, 1uF, 10%, 25V CAP, SMT E, ELEC, 100uF, 20%, 16V C0805C272K5RAC CAP, 0805, X7R, 2700pF, 10%, 50V 70553-0003 HDR, 4X1, 0.025" PIN, 0.1" CTR, 15u" AU SJ372 CONN, 1/8" DOUBLE SW. STEREO PHONE JACK OPTICAL TOSLINK TRANSMITTER TOTX173 TOSHIBA TOTX173 IND_FB1206 TDK HF50ACB321611-T IND, FBEAD, 1206, 31@100MHz, 25% 2 R2,R22 0 RES RES_0805 PHILIPS 9C08052A0R00J RES, SO, 0805, 0, 5%, 1/10W, METAL FILM 19 17 R4,R5,R6,R7,R8,R9,R10, R11,R14,R15,R16,R17, R18,R19,R20,R21,R33 6.8K RES RES_0805 PHILIPS 9C08052A6801F RES, SO, 0805, 6.8K, 1%, 1/10W, METAL FILM 20 2 R12,R13 3.4K RES RES_0805 PHILIPS 9C08052A3401F RES, SO, 0805, 3.4K, 1%, 1/10W, METAL FILM 21 7 R23,R24,R25,R27,R29, R34,R53 47K RES RES_0805 PHILIPS 9C08052A4702J RES, SO, 0805, 47K, 5%, 1/10W, METAL FILM 22 1 R26 68K RES RES_0805 PHILIPS 9C08052A6802J RES, SO, 0805, 68K, 5%, 1/10W, METAL FILM 27 CRD4299-1 AMR 18 28 Mnfr Part Number 23 Item Qty 3 R28,R43,R44 Reference 100K Value RES Type RES_0805 PCB Footprint PHILIPS 9C08052A1003J RES, SO, 0805, 100K, 5%, 1/10W, METAL FILM Description 24 1 R31 4.7K RES RES_0805 PHILIPS 9C08052A4701J RES, SO, 0805, 4.7K, 5%, 1/10W, METAL FILM 25 1 R32 2.7K RES RES_0805 PHILIPS 9C08052A2701J RES, SO, 0805, 2.7K, 5%, 1/10W, METAL FILM 26 2 R35,R39 27K RES RES_0805 PHILIPS 9C08052A2702J RES,27K,SO,0805,5%,1/10W,METAL FILM 27 2 R36,R40 56K RES RES_0805 PHILIPS 9C08052A5602J RES,56K,SO,0805,5%,1/10W,METAL FILM 28 2 R37,R38 10 RES RES_1206 PHILIPS 9C12063A10R0J RES, SO, 1206, 10, 5%, 1/4W, METAL FILM 29 2 R47,R51 47 RES RES_0805 PHILIPS 9C08052A47R0J RES, SO, 0805, 47, 5%, 1/10W, METAL FILM 30 1 R49 8.2K RES RES_1206 Philips 9C12063A820J 31 1 U1 MC33078D DUAL OP AMP SO8 MOTOROLA MC33078D IC, SO, SOIC8, 33078, DUAL OP AMP 32 1 U2 MC1458 DUAL HP OP AMP SO8 MOTOROLA MC1458 DUAL HEADPHONE AMP 33 1 U3 CS4299 IC QFP48_7X7 CRYSTAL CS4299-KQ SEMICOND. IC, TQFP, AC ’97 2.1 SERIAL CODEC W/ SRC 34 1 U4 MC78L05 V REG TO-92 MOTOROLA MC78L05AC 5V POS.VOLT.REG., 100ma 35 1 Y1 24.576 MHz PAR RES, FUND XTL_HC49S FOX FS24.576 XTAL, 24.576MHz, HC49S, Fund Mode, Par Res RES,8.2k,SM1206,5%,1/4W Do Not Populate 1 1 R50 47 RES RES_0805 PHILIPS 9C08052A47R0J RES, SO, 0805, 47, 5%, 1/10W, METAL FILM 2 1 R52 4.7K RES RES_0805 PHILIPS 9C08052A4701J RES, SO, 0805, 4.7K, 5%, 1/10W, METAL FILM 3 2 R45,R48,R3 0 RES RES_0805 PHILIPS 9C08052A0R00J RES, SO, 0805, 0, 5%, 1/10W, METAL FILM 5 1 Y2 24.576 MHz PAR RES, FUND XTL_CA301 EPSON CA-301_24.576M-C XTAL, 24.576MHz, CA-301, Fund Mode, Par Res 6 1 U5 MC78L05ACD V REG SO8 MOTOROLA MC78L05ACD 5V POS. VOLT. REG., 100ma CRD4299-1 AMR DS319RD1A1 • Notes •