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| CS4391 24-Bit, 192 kHz Stereo DAC with Volume Control The following information is based on the technical data sheet: CS4391 DS335PP2 SEP '99 Please contact Cirrus Logic for further information. 352'8&7 ,1)250$7,21 Copyright (c) Cirrus Logic, Inc. 1999 (All Rights Reserved) PI335PP1 OCT `99 Sales Office and Applications Support Contacting Cirrus Logic Support For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at: www.cirrus.com For further information on Cirrus Logic products, please visit our website "www.cirrus.com" or call our literature department (800) 888-5016 ext. 3594 or (512) 912-3594 for data sheets and application notes. CS4391 Features 24-Bit, 192 kHz Stereo DAC with Volume Control Features q Complete Stereo DAC System: Interpolation, D/A, Output q q q q q q q q Analog Filtering 108 dB Dynamic Range 94 dB THD+N Direct Stream Digital Mode Low Clock Jitter Sensitivity +5 V to +3 V Power Supply ATAPI Mixing On-Chip Digital De-emphasis for 32, 44.1, and 48 kHz Volume Control with Soft Ramp -- 119 dB Attenuation -- 1 dB Step Size -- Zero Crossing Click-Free Transitions q 36 mW with 3 V supply q Direct Interface with 5 V to 1.8 V Logic Description The CS4391 is a complete stereo digital-to-analog system including digital interpolation, fourth-order delta-sigma digital-to-analog conversion, digital deemphasis, volume control, channel mixing and analog filtering. The advantages of this architecture include: ideal differential linearity, no distortion mechanisms due to resistor matching errors, no linearity drift over time and temperature and a high tolerance to clock jitter. PI335PP1 OCT `99 1 CS4391 Overview The CS4391 accepts PCM data at sample rates from 2 kHz to 192 kHz, DSD audio data, consumes very little power and operates over a wide power supply range. These features are ideal for DVD, A/V receivers, CD and set-top box systems. M1 (SCL/CCLK) M3 M2 (SDA/CDIN) M0 (AD0/CS) AMUTEC BMUTEC CMOUT FILT+ MODE SELECT (CONTROL PORT) RST EXTERNAL MUTE CONTROL REFERENCE INTERPOLATION FILTER SCLK SERIAL PORT LRCK INTERPOLATOR FILTER SDATA VOLUME CONTROL DAC ANALOG FILTER AOUTA+ AOUTA- MIXER AOUTB+ VOLUME CONTROL DAC ANALOG FILTER AOUTB- MCLK Overview The CS4391 is a complete stereo digital-to-analog system including digital interpolation, fourth-order delta sigma digital-to-analog conversion, digital deemphasis, volume control, channel mixing and analog filtering. The advantages of this architecture include: ideal differential linearity, no distortion mechanisms due to resistor matching errors, no linearity drift over time and temperature and a high tolerance to clock jitter. The CS4391 supports master clock frequencies up to 1024x, depending on the sample rate, therefore supporting various audio environments. In addition, the CS4391 supports a Direct Stream Digital interface for use with Sony's Super Audio CD format. All in all, the CS4391 is a superior D/A for the mid to high performance consumer space. 2 PI335PP1 OCT `99 CS4391 FAQs FAQs 1) A: What is the difference between the CS4390 and CS4391 The CS4391 is a 24-bit, 192kHz D/A converter with 108dB of dynamic range. The CS4390 is a 20-bit, 48kHz D/A converter with 106dB of dynamic range. The CS4391 is a newer D/A converter and is recommended for all new consumer audio design opportunities. Are the CS4390 and CS4391 pin compatible? No. The CS4390 and CS4391 are not pin compatible as they are different architectures and different products altogether. The CS4391 offers improved performance at a lower price point. In addition, future derivatives of the CS4391 will be pin compatible to the CS4391. What is the benefit of switched capacitor analog filter architecture? Clock jitter is common in audio systems and it degrades D/A converter performance. Switched capacitor filters are less sensitive to clock jitter than continuous time filters; therefore it is easier for a designer to use the CS4391 and achieve the target specifications of the D/A converter and the total audio system. Many converters have built in volume control, why is the CS4391s so superior? The CS4391 uses a logarithmic volume control that is programmed via the control port on the D/A converter. Unlike our competitors' parts, the CS4391 does not require an external lookup table to calculate how many steps correspond to dBs of attenuation or amplification. Therefore, the CS4391s volume control is easier to design with and easier to use than our competitors' offerings. 2) A: 3) A: 4) A: PI335PP1 OCT `99 3 CS4391 FAQs 5) A: What are the major differences between the CS4391, CS4340/41, and CS4334? Refer to the following table: CS4334 Resolution (bits) Dynamic Range (A-weighted) (dB) THD+N (dB) Power Supply (V) Power Consumption (mW) Sample Rate (kHz) Package Volume Control Soft Mute Sensitive to jitter? 24 96 -88 +5 75 96 8SOIC No No No CS4340/41 24 102 -90 +3V to +5V 75 96 16SOIC No/Yes No/Yes No/Yes CS4391 24 108 -96 +3V to +5V 76 192/DSD 20TSSOP Yes Yes No 4 PI335PP1 OCT `99 CS4391 Ordering Information Ordering Information CS4391-KZ CDB4391 20-pin TSSOP, -10 to 70 C Evaluation Board PI335PP1 OCT `99 5 PO BOX 17847 4210 S. INDUSTRIAL DRIVE AUSTIN, TEXAS 78744 512.445.7222 / 800.888.5016 FAX: 512.445.7581 WORLDWIDE WEB: http://www.cirrus.com |
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