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CS4461-DZZR Datasheet(PDF) 1 Page - Cirrus Logic |
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CS4461-DZZR Datasheet(HTML) 1 Page - Cirrus Logic |
1 / 11 page Copyright © Cirrus Logic, Inc. 2005 (All Rights Reserved) http://www.cirrus.com Multi-Bit A/D for Class-D Real-Time PSR Feedback Features Advanced Multi-bit Delta-Sigma Architecture Real-time Feedback of Power Supply Conditions (AC and DC) Filterless Digital Output Resulting in Very Low Signal Delay 135 mW Power Consumption Supports Logic Levels Between 3.3 V and 5.0 V Differential Analog Architecture Modulator Overflow Detection Interfaces Directly to the CS44800/CS44600 Class-D PWM Modulator Multi-bit Conversion at up to 7.5 MHz Delivers Modulated Data Over 2-Wire Interface General Description The CS4461 is a complete analog-to-digital converter for class-D real-time power supply rejection (PSR) feed- back. It performs sampling and analog-to-digital conversion, generating digital data for input to a class-D modulator with real-time PSR feedback capabilities. The CS4461 uses a 5th-order, multi-bit delta-sigma modulator followed by output data formatting. The ADC uses a differential architecture which provides excellent noise rejection. The CS4461 feeds back the AC and DC voltage compo- nents and is ideal for class-D audio systems requiring high power supply rejection. The CS4461 is available in a 24-pin TSSOP package in both Commercial (-10° to +70° C) and Automotive grade (-40° to +85° C). The CDB44800 Customer Dem- onstration board is also available for device evaluation and implementation suggestions. Please see “Ordering Information” on page 11 for complete details. Voltage Reference REFGND AIN- AIN+ FILT+ PSR_DATA PSR_SYNC 5.0 V (VA) GND VQ PSR_MCLK S/H + - LP Filter ∆Σ DAC Output Data Formatting 3.3 V to 5.0 V (VDP) PSR_EN OVERFLOW PSR_RESET SEPTEMBER '05 DS650F1 CS4461 |
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