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CRD4299-1 AMR: CrystalClear™ AC '97 AMR Reference Design

Preliminary Product Information

This document contains information for a new product.

Cirrus Logic reserves the right to modify this product without notice.



Cirrus Logic, Inc. 1999

P.O. Box 17847, Austin, Texas 78760

(512) 445 7222 FAX: (512) 445 7581

http://www.cirrus.com

OCT ‘99

DS319RD1A1

CRD4299-1 AMR

CrystalClear™ AC '97 AMR Reference Design

Features

l 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.

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 Specifica-

tion[2], compliant. The CRD4299-1 AMR card is 2.7"

high by 3.6" long.

The CRD4299-1 AMR reference design includes a cus-

tomer 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. Docu-

mentation source files are available to assist the OEM to

quickly provide an accurate end user manual.

ORDERING INFO CRD4299-1 AMR

CS4299

Summary of content (30 pages)

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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.
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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 .....................................................
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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_
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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.
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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.
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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.
PAGE 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.
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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.
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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
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DS319RD1A1 23 CRD4299-1 AMR Figure 18.
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CRD4299-1 AMR DS319RD1A1 Figure 19.
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DS319RD1A1 25 CRD4299-1 AMR Figure 20.
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CRD4299-1 AMR DS319RD1A1 Figure 21.
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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, .
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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.
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• Notes •
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