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| CS5394 117 dB, 48 kHz Audio A/D Converter The following information is based on technical datasheet: CS5394 DS258PP3 NOV '96 Please contact Cirrus Logic: Crystal Semiconductor Products Division for further product information. &5<67$/6(0,&21'8&725 352'8&76 ',9,6,21 352'8&7 ,1)250$7,21 Copyright (c) Cirrus Logic, Inc. 1998 (All Rights Reserved) PI258PP1 JAN `98 CS5394 Features 117 dB, 48 kHz Audio A/D Converter Features q 24-Bit Resolution q Complete CMOS Stereo A/D System - Delta-Sigma A/D Converters - Digital Anti-Alias Filtering - S/H Circuitry and Voltage Reference q Adjustable System Sampling Rates including 32 kHz, 44.1 kHz and 48 kHz q 117 dB Dynamic Range (A-Weighted) q Low Noise and Distortion >103 dB THD + N q Differential Analog Circuitry q Internal 64x Oversampling q Linear Phase Digital Anti-Alias Filtering with >117 dB Stopband Attenuation q Single +5 V Power Supply q Power Down Mode Description The CS5394 is a complete analog-to-digital converter for stereo digital audio systems. It performs sampling, analog-to-digital conversion and anti-alias filtering, generating 24-bit values for both left and right inputs in serial form. The output sample rate can be up to 50 kHz per channel. PI258PP1 JAN `98 1 CS5394 Description The CS5394 uses 7th-order, delta-sigma modulation with 64x oversampling followed by digital filtering and decimation, which removes the need for an external anti-alias filter. The ADC uses a differential architecture which provides excellent noise rejection. The CS5394 has a linear phase filter with passband of dc to 22.1 kHz, 0.005 dB passband ripple and >117 dB stopband rejection. The CS5394 is targeted for the highest performance professional audio systems requiring wide dynamic range, negligible distortion and low noise. VCOM 2 1 VREF Voltage Referenc e Serial Output Interfac e 19 18 17 AINLAINL+ 5 4 S/H Comparator DAC 26 27 S/H Comparator DAC Calibration Microcontroller Calibration SRAM High Pass Filter + LP Filter + Digital Decimation Filter High Pass Filter 10 PDN DFS S/M CAL MCLKA 7 ADCTL 6 DACTL 9 SCLK LRCK SDATA 14 13 16 MCLKD 20 15 NC AINRAINR+ + LP Filter + - Digital Decimation Filter 24 VA+ 3 AGND 25 AGND 28 AGND 23 VL+ 22 8 21 11 VD+ 12 DGND LGND TSTO1 TSTO2 2 PI258PP1 JAN `98 CS5394 Overview Overview The CS5394 is a 24-bit, stereo A/D converter designed for stereo digital audio applications. The device uses a patented, 7th-order tri-level delta-sigma modulator to sample the analog input signals at 64 times the output sample rate (Fs) of the device. Sample rates of up to 50 kHz are supported. The analog input channels are simultaneously sampled by separate delta-sigma modulators. The resulting serial bit streams are digitally filtered, yielding pairs of 24-bit values. This technique yields nearly ideal conversion performance independent of input frequency and amplitude. The converter does not require difficult-todesign or expensive anti-alias filters and it does not require external sampleand-hold amplifiers or voltage references. An on-chip voltage reference provides for a differential input signal range of 4.0 Vpp. The device also contains a high pass filter, implemented digitally after the decimation filter, to eliminate any internal offsets in the converter or any offsets present at the input circuitry to the device. Output data is available in serial form, coded as 2's complement 24-bit numbers. The typical power consumption of 740 mW can be reduced by use of the power-down mode. PI258PP1 JAN `98 3 CS5394 Ordering Information Ordering Information CS5394-KS -10 to 70C 28-pin SOIC 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. 4 PI258PP1 JAN `98 Sales Office and Applications Support UNITED STATES 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 Crystal Semiconductor Div. 6 Venture, Ste. 100 Irvine, CA 92718 Ph: 714-453-5910 FAX: 714-453-5914 EUROPE Sales Office and Applications Support: 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 (UK) Ltd. Spectrum Point, 279 Farnborough Rd., Farnborough, Hampshire GU14 7LS, United Kingdom Ph: +44(0)1252372762 FAX: +44(0)1252372763 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 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 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 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 |
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