4329pi.fm Page -1 Thursday, January 22, 1998 11:25 AM CS4329 20-Bit, Stereo D/A Converter for Digital Audio The following information is based on the Crystal Semiconductor Product Datasheet: DS153PP1 FEB ‘95 Please contact Crystal Semiconductor for further information. &5<67$/6(0,&21'8&725 352'8&76',9,6,21 352'8&7,1)250$7,21 Copyright © Cirrus Logic, Inc. 1998 (All Rights Reserved) PI153PP1 JAN ‘98 4329pi.fm Page 1 Thursday, January 22, 1998 11:25 AM CS4329 Features 20-Bit, Stereo D/A Converter for Digital Audio Features ● 20-Bit Resolution ● 112 dB Signal-to-Noise-Ratio (EIAJ) ● Complete Stereo DAC System - 128X Interpolation Filter - Delta-Sigma DAC - Analog Post Filter ● 105 dB Dynamic Range ● Low Clock Jitter Sensitivity ● Filtered Line-Level Outputs - Linear Phase Filtering - Zero Phase Error Between Channels ● Adjustable System Sampling Rates including 32 kHz, 44.1 kHz & 48 kHz ● Digital De-emphasis for 32 kHz, 44.1 kHz & 48 kHz Description The CS4329 is a complete stereo digital-to-analog output system. In addition to the traditional D/A function, the CS4329 includes a digital interpolation filter followed by an 128X oversampled delta-sigma modulator. The modulator output controls the reference voltage input to an ultra-linear analog low-pass filter. This architecture allows for infinite adjustment of sample rate between 1 and 50 kHz while maintaining linear phase response simply by changing the master clock frequency. PI153PP1 JAN ‘98 1 4329pi.fm Page 2 Thursday, January 22, 1998 11:25 AM CS4329 Description The CS4329 also includes an extremely flexible serial port utilizing mode select pins to support multiple interface formats. The master clock can be either 256, 384, or 512 times the input sample rate, supporting various audio environments. 2 PI153PP1 JAN ‘98 4329pi.fm Page 3 Thursday, January 22, 1998 11:25 AM CS4329 Overview Overview CRYSTAL INTRODUCES TWO DELTA-SIGMA D/A CONVERTERS FOR DIGITAL AUDIO APPLICATIONS Today, Crystal Semiconductor the leader in audio conversion, announced two audio D/A converters - the CS4327 and CS4329. The CS4329 is the world’s highest performance delta-sigma digital-to-analog converter, and the CS4327 provides an optimal price vs. performance trade-off for cost sensitive applications. The CS4329 device is the first to achieve 105 dB dynamic range using onchip switched-capacitor analog low pass filtering. The device’s performance target it directly at the emerging digital mixing desk market and other professional applications such as digital audio tape (DAT) players, multi-track recorders and high-end effects processors. At 101 dB dynamic range, the CS4327 targets lower cost musical keyboard and effects processor applications. Delta-Sigma versus Resistor Ladder D/A converters The C4327 and CS4329 are designed using a 1-bit delta-sigma conversion. The advantage of single-bit converters over multi-bit topologies is that they are inherently linear,. Single-bit conversion yields perfect linearity independent of signal amplitude, while the performance of multi-bit (or resistor ladder) devices degrade with small input signals. The poor linearity of multi-bit devices has been accepted as these devices have offered the lowest noise solutions of any other D/A conversion architectures. The CS4329 breaks the 100 dB noise barrier as it is the first delta-sigma device to provide 105 dB dynamic range, performance better than multi-bit DACs, and the ideal linearity of deltasigma conversion. Delta-sigma D/A conversion offers a high level of integration over multi-bit DAC solutions. The CS4327 and CS4329 are complete D/A conversion system providing interpolation, D/A conversion, and switched-capacitor analog filtering;. Competing resistor ladder solutions require two single channel DACs, a separate digital filter, and external analog low pass filtering for the DAC outputs. David Bresemann, Digital Audio Product Manager, states, “The CS4327 and CS4329 are offered in a space saving 16-pin and 20-pin SSOP packages providing a 400% board space reduction over existing R2R solutions with no sacrifice in performance.” PI153PP1 JAN ‘98 3 4329pi.fm Page 4 Thursday, January 22, 1998 11:25 AM CS4329 Overview Design and Performance The CS4327 and CS4329 devices achieve low noise designs through 4th order delta-sigma modulation and 128X oversampling. The 128X oversampling spreads the noise energy over twice the bandwidth of previous 64X oversampled systems enabling a 3 dB improvement in dynamic range. In addition, the 128X oversampling enables lower out-of-band noise than previous 64X oversampled designs minimizing the negative effects of non-linear components downstream from the D/A converter in digital audio systems. The CS4329 features 20-bit resolution, 112 dB signal-to-noise ratio, and 105 dB dynamic range. Total harmonic distortion + noise is specified at -97 dB for a full scale output signal. The CS4327 features 20-bit resolution, 110 dB signal-to-noise ratio, 101 dB dynamic range, and -90 dB total harmonic distortion + noise. The low noise and distortion of these devices target them directly at high performance professional and high-end consumer audio systems. Both devices support sample rates from 1kHz to 50 kHz and include selectable deemphasis filters for 32kHz, 44.1 kHz, and 48 kHz applications, such as Digital Audio Tape (DAT). Both devices support muting on zero input data which provides the lowest noise floor during an idle channel condition, such as between music tracks on a compact disc player. The CS4329 also provides independent muting for the left and right channel outputs. Tolerant to Clock Jitter The CS4327 and CS4329 contain on-chip analog low pass filtering implemented using a switched-capacitor design. This analog low pass filter architecture is ideal for digital audio applications because of the requirement for a low jitter D/A clock can be essentially eliminated by the use of the switched capacitor structure. The switched capacitor filter processes packets of charge by charging a voltage reference. As long as the voltage reference value settles on the capacitor, the magnitude of the charge packet will be independent of the clock jitter. Often the clocks available in a digital audio system contain jitter, such as recovered clocks from an AES/EBU data stream, the CS4327 and CS4329 will reject this jitter with no degradation in sound quality. 4 PI153PP1 JAN ‘98 4329pi.fm Page 5 Thursday, January 22, 1998 11:25 AM CS4329 Overview Packaging, Pricing, and Availability The CS4327 is available in a 16-pin SSOP package. The device operates from a single +5 volt power supply and typical power consumption is a low 205 mW. The CS4327 is available in volume production. When purchased in a quantity of 1,000 or more, the CS4327 is priced at $4.95 each. The CS4329 is available in both 20-pin DIP and SSOP packages, and it operates from a single +5 volt power supply. Typical power consumption is a low 205 mW. The CS4329 is available in production quantities. When purchased in a quantity of 1,000 or more, the CS4329 is priced at $9.95 each. PI153PP1 JAN ‘98 5 4329pi.fm Page 6 Thursday, January 22, 1998 11:25 AM CS4329 FAQs FAQs 1) A: Is the CS4329 Crystal’s highest performance DAC? Yes. The CS4329 is the highest performance delta-sigma DAC available at 105 dB dynamic range and 112 dB signal-to-noise ratio. 2) A: What is the purpose of AUTO_MUTE on the device? The AUTO_MUTE function enables a lower system noise floor when all zero data is presented to the CS4329. When AUTO_MUTE is enabled, the DAC output will automatically mute on zero input data, hereby improving the signal-to-noise ratio from 105 dB to 112 dB. Ordering Info CS4329-KP -10 to 70 ×C 20-pin Plastic DIP CS4329-KS -10 to 70 ×C 20-pin Plastic SSOP CDB4329 CS4329 Evaluation Board For further information on Crystal products, please visit our website “www.crystal.com” or call our literature department (800) 888-5016 ext. 3594 or (512) 912-3594 for data sheets and application notes. 6 PI153PP1 JAN ‘98 4329pi.fm Page 7 Thursday, January 22, 1998 11:25 AM CS4329 -- NOTES -- PI153PP1 JAN ‘98 7 4329pi.fm Page 8 Thursday, January 22, 1998 11:25 AM CS4329 -- NOTES -- 8 PI153PP1 JAN ‘98 4329pi.fm Page 9 Thursday, January 22, 1998 11:25 AM Sales Office and Applications Support UNITED STATES EUROPE Sales Office and Applications Support: Sales Office and Applications Support: WESTERN AREA Cirrus Logic Crystal Semiconductor Div. 50 Airport Pkwy. San Jose, CA 95110 Ph: 408-437-7743 FAX: 408-437-4943 Cirrus Logic France Immeuble Andre Malraux 93561 Rosny s/s Bois CEDEX, France Ph: +33(148)122812 FAX: +33(148)122810 Cirrus Logic Crystal Semiconductor Div. 6 Venture, Ste. 100 Irvine, CA 92718 Ph: 714-453-5910 FAX: 714-453-5914 Cirrus Logic Crystal Semiconductor (UK) Ltd. Spectrum Point, 279 Farnborough Rd., Farnborough, Hampshire GU14 7LS, United Kingdom Ph: +44(0)1252372762 FAX: +44(0)1252372763 CENTRAL AREA Cirrus Logic Crystal Semiconductor Div. 14205 Burnet Rd., Ste. 400 Austin, TX 78728 Ph: 512-255-8893 FAX: 512-255-0733 EASTERN AREA Cirrus Logic Crystal Semiconductor Div. 5511 Capital Center Dr., Ste. 103 Raleigh, NC 27606 Ph: 919-859-5393 FAX: 919-859-5334 Cirrus Logic 10 New England Business Center, Ste. 100 Andover, MA 01810 Ph: 978-794-9138 FAX: 978-794-9998 Cirrus Logic Crystal Semiconductor Div. 10440 Little Patuxent Pkwy., Ste. 300 Columbia, MD 21044-3559 Ph: 410-740-5654 FAX: 410-740-6961 Cirrus Logic GmbH Muehlfelder-Strasse 2 D-82211 Herrsching, Germany Ph: +49(08152)92460 FAX: +49(08152)924699 KOREA Cirrus Logic, Korea Co., Ltd. Rm 1302 SangKyung Bldg., 82421 YeokSam-Dong, KangNam-Ku, Seoul, Korea Ph: +82(2)565-8561 FAX: +82(2)565-8565 SINGAPORE Cirrus Logic Crystal International 6 Kaki Bukit Ave. 1, Ste. 03-03 Singapore 417940 Ph: +65-743-4111 FAX: +65-742-4111 TAIWAN Cirrus Logic International Ltd. Taiwan Branch 10F, No.214 Tun Hwa North Rd. Taipei, Taiwan R.O.C. Ph: +886(2)2718-4533 FAX: +886(2)2718-4526 JAPAN FAR EAST Sales Office and Applications Support: CHINA Cirrus Logic International Ltd. A-1403, Qiancun Commercial Mansion Beijing, China 100029 Ph: (8610)6443-0783 Ph: (8610)6443-0784 Ph: (8610)6443-0785 FAX: (8610)6443-0786 HONG KONG Cirrus Logic International Ltd. 1203 Park Tower 15 Austin Rd., Tsimshatsui Kowloon, Hong Kong Ph: (852)2376-0801 FAX: (852)2375-1202 Sales Office and Applications Support: Cirrus Logic K.K. Shinjuku Green Tower, Bldg. 26F 6-14-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo, 160 Japan Ph: +81(03)3340-9111 FAX: +81(03)3340-9120 4329pi.fm Page 10 Thursday, January 22, 1998 11:25 AM CRYSTAL SEMICONDUCTOR PRODUCTS DIVISION PO BOX 17847 4210 S. INDUSTRIAL DRIVE AUSTIN, TEXAS 78744 512.445.7222 / 800.888.5016 FAX: 512.445.7581 WORLDWIDE WEB: http://www.crystal.com