2 ADC, 8 DAC, 96 kHz, 24-Bit - Codecs AD1835A FEATURES Supports 256 f , 512 f , and 768 f Master S S S 5 V Stereo Audio System with 3.3 V Tolerant Digital Mode Clocks Interface Power-Down Mode Plus Soft Power-Down Mode Supports up to 96 kHz Sample Rates Flexible Serial Data Port with Right-Justified, Left- 2 192 kHz Sample Rate Available on 1 DAC Justified, I S Compatible, and DSP Serial Port Modes Supports 16-/20-/24-Bit Word Lengths TDM Interface Mode Supports 8-In/8-Out Using a Multibit - Modulators with Single SHARC SPORT Perfect Differential Linearity Restoration for 52-Lead MQFP Plastic Package Reduced Idle Tones and Noise Floor APPLICATIONS Data Directed Scrambling DACsLeast DVD Video and Audio Players Sensitive to Jitter Home Theater Systems Differential Output for Optimum Performance Automotive Audio Systems ADCs: 95 dB THD + N, 105 dB SNR, and Audio/Visual Receivers Dynamic Range Digital Audio Effects Processors DACs: 95 dB THD + N, 108 dB SNR, and Dynamic Range PRODUCT OVERVIEW On-Chip Volume Controls per Channel with The AD1835A is a high performance, single-chip codec fea- 1024-Step Linear Scale turing four stereo DACs and one stereo ADC. Each DAC DAC and ADC Software Controllable Clickless Mutes comprises a high performance digital interpolation filter, a Digital De-emphasis Processing multibit - modulator featuring Analog Devices patented technology, and a continuous-time voltage out analog section. (continued on page 11) FUNCTIONAL BLOCK DIAGRAM DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH CIN COUT MCLK PD/RST M/S AVDD AVDD DLRCLK CLOCK CONTROL PORT DBCLK OUTLP1 VOLUME SERIAL DATA OUTLN1 DSDATA1 - DIGITAL I/O PORT FILTER DAC OUTRP1 DSDATA2 VOLUME OUTRN1 DSDATA3 OUTLP2 VOLUME DSDATA4 OUTLN2 - DIGITAL DAC FILTER OUTRP2 VOLUME OUTRN2 ADCLP OUTLP3 - DIGITAL VOLUME OUTLN3 ADC FILTER - DIGITAL ADCLN DAC FILTER OUTRP3 VOLUME OUTRN3 OUTLP4 ADCRP - DIGITAL VOLUME - OUTLN4 ADC FILTER DIGITAL ADCRN FILTER DAC OUTRP4 VOLUME OUTRN4 FILTD AD1835A V FILTR REF DGND DGND AGND AGND AGND AGND REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. may result from its use. No license is granted by implication or otherwise Tel: 781/329-4700 www.analog.com under any patent or patent rights of Analog Devices. Trademarks and Fax: 781/326-8703 2003 Analog Devices, Inc. All rights reserved. registered trademarks are the property of their respective owners.AD1835ASPECIFICATIONS TEST CONDITIONS Supply Voltages (AVDD, DVDD) 5.0 V Ambient Temperature 25C Input Clock 12.288 MHz (256 f Mode) S ADC Input Signal 1.0078125 kHz, 1 dBFS (Full Scale) DAC Input Signal 1.0078125 kHz, 0 dBFS (Full Scale) Input Sample Rate (f ) 48 kHz S Measurement Bandwidth 20 Hz to 20 kHz Word Width 24 Bits Load Capacitance 100 pF Load Impedance 47 k Performance of all channels is identical (exclusive of the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications). Parameter Min Typ Max Unit ANALOG-TO-DIGITAL CONVERTERS ADC Resolution 24 Bits Dynamic Range (20 Hz to 20 kHz, 60 dB Input) No Filter 100 103 dB A-Weighted (48 kHz and 96 kHz) 105 dB Total Harmonic Distortion + Noise (THD + N) 48 kHz 95 88.5 dB 96 kHz 95 87.5 dB Interchannel Isolation 100 dB Interchannel Gain Mismatch 0.025 dB Analog Inputs Differential Input Range ( Full Scale) 2.828 +2.828 V Common-Mode Input Voltage 2.25 V Input Impedance 4 k Input Capacitance 15 pF V 2.25 V REF DC Accuracy Gain Error 5% Gain Drift 35 ppm/C DIGITAL-TO-ANALOG CONVERTERS DAC Resolution 24 Bits Dynamic Range (20 Hz to 20 kHz, 60 dBFS Input) No Filter 103 105 dB With A-Weighted Filter (48 kHz and 96 kHz) 105 108 dB Total Harmonic Distortion + Noise (48 kHz and 96 kHz) 95 90 dB Interchannel Isolation 110 dB DC Accuracy Gain Error 4.0 % Interchannel Gain Mismatch 0.025 dB Gain Drift 200 ppm/C Interchannel Crosstalk (EIAJ Method) 120 dB Interchannel Phase Deviation 0.1 Degrees Volume Control Step Size (1023 Linear Steps) 0.098 % Volume Control Range (Maximum Attenuation) 60 dB Mute Attenuation 100 dB De-emphasis Gain Error 0.1 dB Full-Scale Output Voltage at Each Pin (Single-Ended) 1.0 (2.8) V rms (V p-p) Output Resistance at Each Pin 180 Common-Mode Output Voltage 2.25 V ADC DECIMATION FILTER, 48 kHz* Pass Band 21.77 kHz Pass-Band Ripple 0.01 dB Stop Band 26.23 kHz Stop-Band Attenuation 120 dB Group Delay 910 s 2 REV. A