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Cirrus Logic CRD4297-1 AMR Product Data Book

Audio modem riser reference design
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FEATURES
AMR Audio Codec add-in card designed to meet
®
the Intel
Audio/Modem Riser Specification
High quality, low cost, 2-layer, single sided
adapter board
CS4297 SoundFusion
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
Meets or exceeds Microsoft's
PC 99, both required and advanced, audio
performance requirements.
ORDERING INFO
CRD4297-1 AMR
DS242RD1B1
™
Audio Codec '97
®
PC 97, PC 98, and
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
Copyright © Cirrus Logic, Inc. 1998
CRD4297-1 AMR
CrystalClear™
AC '97 AMR Audio Modem
Riser Reference Design
DESCRIPTION
The CRD4297-1 AMR add-in board reference design
showcases Cirrus Logic's Crystal Audio AC '97
CS4297 SoundFusion Audio Codec '97, and is Au-
dio/Modem Riser Specification[2], compliant. The
CRD4297-1 AMR card is 2.7" high by 3.6" long.
The CRD4297-1 AMR reference design includes a cus-
tomer ready manufacturing kit. Included in the kit are a
full set of schematic design files (OrCAD
PCB job files (PADS
bracket drawings (Gerber), and bill of materials. The de-
sign 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.
(All Rights Reserved)
Advanced Product Databook
®
ASCII),
PCB artwork files,
®
7.2 format),
DEC '98

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Summary of Contents for Cirrus Logic CRD4297-1 AMR

  • Page 1 PC 97, PC 98, and dio/Modem Riser Specification[2], compliant. The PC 99, both required and advanced, audio CRD4297-1 AMR card is 2.7" high by 3.6" long. performance requirements. The CRD4297-1 AMR reference design includes a cus- tomer ready manufacturing kit. Included in the kit are a ®...

  • Page 2: General Information

    “AS IS” without warranty of any kind (express or implied). No responsibility is as- sumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This docu- ment is the property of Cirrus Logic, Inc.
  • Page 3 • Maximum output power: 70 mW/channel The Modem Audio, CD In, Audio In, and Aux In (32 Ω load) headers are also part of the Analog I/O section. The CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 4 - Pin 3 : Analog Ground Figures 11 through 17 show the schematics for the - Pin 4 : Right Channel CRD4297-1 AMR card. This section will describe Aux In particular pages of the schematic that need to be discussed.
  • Page 5 For the best audio performance, the analog voltage The line out is driven directly by the CS4297. The regulator, an MC78L05, is located near the headphone out amplifier, a Motorola MC1458, is CS4297. A 10 µF electrolytic capacitor should be CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 6 Great attention was given to the particular compo- plane. nents on the CRD4297-1 AMR board with cost, The area around the crystal oscillator and the two performance, and package selection as the most im- XTAL signals is filled with copper on the top and portant factors.
  • Page 7 Using Figure X as an example, and associated with the left vertical axis. CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 8 Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response CwGRAPH 0.65 CrystalWare(tm) LEFT 97-1\97-1NXL.ADX RIGHT -100 -105 -110 -100 10 k 20 k Frequency (Hz) Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 9 20 k Frequency (Hz) Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency CwGRAPH 0.65 CrystalWare(tm) LEFT 97-1\97-1MAL.ADX RIGHT 10 k 20 k Frequency (Hz) Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 10 Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range CwGRAPH 0.65 CrystalWare(tm) LEFT 97-1\97-1DAL.ADX RIGHT -100 -105 -110 -100 10 k 20 k Frequency (Hz) Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 11 Frequency (Hz) Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response CwGRAPH 0.65 CrystalWare(tm) 97-1\97-1NAM.ADX -100 -105 -110 10 k 20 k Frequency (Hz) Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 12 Frequency (Hz) Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency CwGRAPH 0.65 CrystalWare(tm) 97-1\97-1CAL.ADX -100 10 k 20 k Frequency (Hz) Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency CIRRUS LOGIC ADVANCED PRODUCT DATABOOK DS242RD1B1...
  • Page 13 Bill of materials 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, CS4297 SoundFusion Audio Codec ‘97 Data Sheet, July 1998. http://www.cirrus.com/products/overviews/ cs4297.html 4) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 0.5 http://www.cirrus.com/products/papers/...
  • Page 14 A M R _ B U S P C _ B E E P _ B U S S P D I F _ O U T P C _ B E E P _ B U S S / P D I F _ O U T A M R _ B U S AUDIO_IN C S 4 2 9 7...
  • Page 15 H O L E H O L E TO O L H OLE AMR BUS CGND AU D I O _ M U T E # AU D I O _ P W R D N G N D M O N O _ P H O N E P C _ B E E P _ B U S M O N O _ O U T / P C _ B E E P R S V D...

  • Page 16: Power Supplies

    POWER SUPPLIES M C 7 8 L 0 5 AC D Do not populate U5 N C 2 N C 1 S U R FA C E M O U N T P O P U L AT I O N G N D 3 G N D 2 O P T I O N...
  • Page 17 +3.3VD +5VA C 5 1 C 5 2 C 5 3 C 5 4 C 5 5 C 5 6 C 5 7 C 5 8 C 5 9 0.1uF 0.1uF 0.1uF 0.1uF 680pF 680pF 680pF 680pF 680pF Z 5 U Z 5 U Z 5 U N P O...
  • Page 18 CD IN VIDEO IN 6.8 K C 4 1 u F C D _ I N R 6.8 K 1 u F V I D E O _ R 6.8 K 6.8 K AGND 6.8 K C 8 1 u F C D _ I N L AGND 6.8 K...
  • Page 19 C 4 1 2 2 pF R 3 6 -12VA C 4 0 R 3 5 A LT _ L INE_OUT_R 1 0 U F R 3 7 +12VA U 2 A HEADPHONE MC14 58 AGND 1/4 W JACK C 4 3 2 2 pF R 3 8 R 4 0...
  • Page 20 +5VA +5VA R 2 5 47 K U 1 A M C 33078D R 2 6 R 2 7 C 3 1 47 K 1 0 U F 68 K AGND AGND R 2 8 AGND 10 0K R 2 9 AGND R 3 2 2.7 K...
  • Page 21 Figure 18. Assembly Drawing...
  • Page 22 Figure 19. Top Layer...
  • Page 23 Figure 20. Bottom Layer...
  • Page 24 Figure 21. Bracket Drawing...

  • Page 25: Bill Of Materials

    BILL OF MATERIALS CRD4297-AMR Item Qty Reference Value Type PCB-Footprint Mnfr Part Number Description C1,C3,C31,C37,C40,C42, 10UF ELELCT ALUM/10UF/16P PANASONIC ECA-1CM100 ALUM ELECT,10uF,20%,16V,POL C46,C47,C72 12 C2,C26,C30,C50,C51,C52, 0.1uF CSN_0805 KEMET C0805C104M5UAC CAP, 0805, Z5U, .1uF, 20%, 50V C53,C54,C65,C67,C71, 12 C4,C5,C8,C9,C13,C14,C15, CSN_1206 VENKEL C1206X7R500- CAP, 1206, X7R, 1uF, 10%, 25V C20,C25,C28,C29,C34...
  • Page 26 Item Qty Reference Value Type PCB-Footprint Mnfr Part Number Description 8.2K RES_1206 Philips 9C12063A820J RES,8.2k,SM1206,5%,1/4W MC33078D OP AMP MOTOROLA MC33078D IC, SO, SOIC8, 33078, DUAL OP AMP MC1458 MOTOROLA MC1458 DUAL HEADPHONE AMP CS4297 CODEC QFP48_7X7 CRYSTAL CS4279 IC, SO, AC ’97 2.0 SERIAL CODEC w/ SRC SEMICOND.
  • Page 27 • Notes •...

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