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CS5360
24-Bit Stereo A/D Converter for Digital Audio
The following information is based on the technical datasheet:
CS5360 DS280PP1 SEP '97 Please contact Cirrus Logic : Crystal Semiconductor Products Division for further information.
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Copyright (c) Cirrus Logic, Inc. 1998 (All Rights Reserved)
PI280PP1 MAR `98
CS5360
Features
24-Bit Stereo A/D Converter for Digital Audio
Features
q 24 Bit Digital Output q 105 dB Dynamic Range q -95 dB THD+N q 128X Oversampling q Fully Differential Inputs q Linear Phase Digital Anti-Alias Filtering
- 21.7 kHz passband (Fs = 48kHz) - 85 dB stop band attenuation - 0.0025 dB pass band ripple q High Pass Filter - DC Offset Removal
q Peak Signal Level Detector
- High Resolution and Bar Graph Modes q Pin Compatible with CS5334 and CS5335
Description
The CS5360 is a 2-channel, single +5 V supply, 24-bit analog-to-digital converter for digital audio systems. The CS5360 performs sampling, analog-todigital conversion and anti-alias filtering, generating 24-bit values for both left and right inputs in serial form. The output word rate can be up to 50 kHz per channel. The CS5360 uses 4th-order, delta-sigma modulation with 128X oversampling followed by digital filtering and decimation, which removes the need for an external anti-alias filter. This ADC uses a differential architecture which provides excellent noise rejection.
PI280PP1 MAR `98
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CS5360
Overview
The CS5360 has a filter passband to 21.7 kHz. The filter has linear phase, 0.0025 dB passband ripple, and >85 dB stopband rejection. An on-chip high pass filter is also included to remove DC offsets.
VA+ 3 CMOUT 15 Voltage Reference
VD+ 6
RST 18
MCLK 7
OVFL 2
FRAME 10
SCLK 8
LRCK 12 9 SDATA DIF0 DIF1
Serial Output Interface
20 19
AINLAINL+
16 17
+ S/H
LP Filter
+ Comparator
Digital Decimation Filter
High Pass Filter
DAC AINRAINR+ 14 13 S/H DAC 4 AGND + LP Filter
+ Comparator 5 DGND
Digital Decimation Filter
High Pass Filter
11 PU
1 HP DEFEAT
Overview
The CS5360 is a 24-bit, 2-channel analog-to-digital converter designed for digital audio applications. This device uses two one-bit delta-sigma modulators which simultaneously sample the analog input signals at 128 times the output sample rate (Fs). The resulting serial bit streams are digitally filtered, yielding a pair of 24-bit values. This technique yields nearly ideal conversion performance independent of input frequency and amplitude. The converter does not require difficult-to-design or expensive anti-alias filters and does not require external sample-and-hold amplifiers or a voltage reference. Very few external components are required to support this ADC. Normal power supply decoupling components and a resistor and capacitor on each input for anti-aliasing are all that's required.
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PI280PP1 MAR `98
CS5360
FAQs
An on-chip voltage reference provides for a differential input signal range of 2.0 Vrms. Output data is available in serial form, coded as 2's complement, 24bit numbers. Typical power consumption is 325 mW which can be reduced to 1.0 mW by using the power-down feature.
FAQs
1) A: Is the CS5360 Crystal's lowest priced 24-bit converter? Yes. The CS5360 is the lowest priced 24-bit converter offering 105 dB dynamic range and -95 dB total harmonic distortion + noise. Crystal also offers three higher performance 24-bit audio A/D converters - the CS5394, CS5396, and CS5397. The CS5394 offers 117 dB dynamic range with -103 dB THD+N and the CS5396 and CS5397 are the worlds only 24-bit, 96 kHz audio A/D converters. The CS5396 and CS5397 are also the first audio A/D converters to achieve 120 dB dynamic range. When used with the CS4390 24-bit DAC, what is the dynamic range performance in loopback mode (analog in to analog out)? 102-103 dB dynamic range. What advantage does the high pass filter offer over traditional calibration techniques to reduce offsets? The CS5360 high pass filter can remove both offsets in the input circuitry driving the ADC and internal offsets generated within the ADC. The use of a digital high pass filter technique to reduce offsets consistently produces a zero LSB offset which cannot be achieved with traditional calibration techniques. Is the high pass filter defeatable for applications where DC information is important. Yes.
2) A: 3) A:
4) A:
PI280PP1 MAR `98
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CS5360
Ordering Information
5) A: How is the peak signal level detector used? The peak signal detector monitors the input signal level into the ADC and outputs 8 bits which correspond to the peak input level. These bits can be used to implement a low cost bar graph display. These 8 bits are output from the ADC following the audio data, and they indicate whether the input signal is clipping (5 dB above full scale) or -60 dB from full scale in 1 dB step resolution. The peak signal detector is updated by toggling the PU (peak update) pin. How is the overflow output used? The OVFL pin goes high when the audio data exceeds the analog input range of the ADC. This pin can be used to light an LED on a system front panel indicating an overrange condition. This pin is cleared with the PU (peak update) pin.
6) A:
Ordering Information
CS5360-KS -10 to 70C 20-pin Plastic SSOP
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.
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PI280PP1 MAR `98
Sales Office and Applications Support
UNITED STATES Western Area Cirrus Logic, Inc. 3100 West Warren Ave. Fremont, CA 94538 Ph: 510-623-8300 FAX: 510-252-6020
Southern California, Sales Westlake Village The Townsgate Executive Bldg. 2659 Townsgate Road, Suite 238 Westlake Village, CA 91361 Ph: 805-371-5860 FAX 805-371-5861 Cirrus Logic, Inc. 6650 S.W. Redwood Lane, Ste. 105, First Floor Bldg. 16 Portland, Oregon 97224 Ph: 503-620-5547 FAX: 503-620-5665
EUROPE
Cirrus Logic International SARL Immeuble Andre Malraux 1 rue de Rome F-93561 Rosny-sous-Bois CEDEX, France Ph: +33148122812 FAX: +33148122810 Cirrus Logic UK. Angler's Court 4-5 Spittal St. Marrlow Bucks, England SL7 1DB Ph: +44(0)1628 472 211 FAX: +44(0)1628 486 114 Cirrus Logic GmbH Muehlfelder-Strasse 2 D-82211 Herrsching, Germany Ph: +49815292460 FAX: +498152924699
Korea Cirrus Logic, Korea Co., Ltd. Rm 1302 SangKyung Bldg., 824-21 YeokSam-Dong, Kang Nam-Ku, Seoul, Korea Ph: +82(2)565-8561 FAX: +82(2)565-8565 Singapore Cirrus Logic 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(22)718-4533 FAX: +886(22)718-4526
Central Area Cirrus Logic, Inc. 14205 Burnet Rd., Ste. 400 Austin, TX 78728 Ph: 512-255-8893 FAX: 512-255-0733 Sotheastern Area Cirrus Logic, Inc.. 5511 Capital Center Dr., Ste. 103 Raleigh, NC 27606 Ph: 919-859-5210 FAX: 919-859-5334 Northeastern Area Cirrus Logic, Inc. 10 New England Business Center, Ste. 100 Andover, MA 01810 Ph: 978-794-9992 FAX: 978-794-9998
Cirrus Logic, Inc. 10440 Little Patuxent Pkwy., Ste. 300 Columbia, MD 21044-3559 Ph: 410-740-5654 FAX: 410-740-6961
FAR EAST 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 JAPAN
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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