CS4525 30 W Digital Audio Amplifier with Integrated ADC Digital Amplifier Features ADC Features Stereo, 24-bit, 48 kHz Conversion Fully Integrated Power MOSFETs Multi-bit Architecture No Heatsink Required 95 dB Dynamic Range (A-wtd) Programmable Power Foldback on Thermal Warning -86 dB THD+N High Efficiency Supports 2 Vrms Input with Passive Components > 100 dB Dynamic Range System Features < 0.1% THD+N 1 W Asynchronous 2-channel Digital Serial Port Configurable Outputs (10% THD+N) 32 kHz to 96 kHz Input Sample Rates 1 x 30 W into 4 , Parallel Full-Bridge Operation with On-chip Oscillator Driver or 2 x 15 W into 8 , Full-Bridge Applied SYS CLK at 18.432, 24.576 or 2 x 7 W into 4 , Half-Bridge + 1 x 15 W 27.000 MHz into 8 , Full-Bridge Integrated Sample Rate Converter (SRC) Built-In Protection with Error Reporting Eliminates Clock-jitter Effects Overcurrent / Undervoltage / Thermal Input Sample Rate Independent Operation Overload Shutdown Simplifies System Integration Thermal Warning Reporting Spread Spectrum PWM Modulation PWM Popguard for Half-Bridge Mode Reduces EMI Radiated Energy Click-free Start-up Low Quiescent Current Programmable Channel Delay for System Noise & Radiated Emissions Management (Features continued on page 2) 2.5 V to 5 V 8 V to 18 V VP System Clock Audio Amplifier Gate PWM Processing Out 1 Drive Crystal Driver Crystal Oscillator Driver I/O Parametric EQ Gate Amplifier High-Pass Stereo Multi-bit ADC Drive Out 2 Bass/Treble Multi-bit Analog In Modulator Adaptive Loudness Serial Audio Serial Audio Input Port Compensation with Clocks & Data Gate 2-Ch Mixer Amplifier Drive Integrated Out 3 2.1 Bass Mgr Serial Audio Serial Audio Sample Rate Delay Interface Linkwitz-Riley Data I/O Crossover Converter Serial Audio Amplifier Auxiliary Serial Port Gate Clocks & Data De-Emphasis Out 4 Drive Volume HP Detect/Mute PGND Error Protection PWM Modulator Reset Output 1 Register /Hardware Over Current Interrupt Thermal Warning Configuration PWM Modulator Under Voltage IC or Hardware Thermal Feedback Output 2 Configuration This document contains information for a new product. Preliminary Product Information Cirrus Logic reserves the right to modify this product without notice. Copyright Cirrus Logic, Inc. 2008 JUL 08 (All Rights Reserved) CS4525 Software Mode System Features Common Applications Digital Audio Processing Integrated Digital TVs 5 Programmable Parametric EQ Filters Flat Panel TV Monitors Selectable High-pass Filter Computer/TV Monitors Bass/Treble Tone Control Mini/Micro Shelf Systems Adaptive Loudness Compensation Digital Powered Speakers 2-channel Mixer Portable Docking Stations 2.1 Bass Management Computer Desktop Audio 24 dB/octave Linkwitz-Riley Crossover Filters De-emphasis Filter General Description Selectable Serial Audio Interface Formats The CS4525 is a stereo analog or digital input PWM Left-justified up to 24-bit high efficiency Class D amplifier audio system with an IS up to 24-bit integrated stereo analog-to-digital (A/D) converter. The stereo power amplifiers can deliver up to 15 W per Right-justified 16-, 18-, 20-, 24-bits channel into 8 speakers from a small space-saving Digital Serial Connection to Additional CS4525 48-pin QFN package. The PWM amplifier can achieve or DACs for Subwoofer greater than 85% efficiency. The package is thermally Digital Interface to External Lip-sync Delay enhanced for optimal heat dissipation which eliminates the need for a heatsink. PWM Switch Rate Shifting Eliminates AM Frequency Interference The power stage outputs can be configured as two full- Digital Volume Control with Soft Ramp bridge channels for 2 x 15 W operation, two half-bridge channels and one full-bridge channel for +24 to -103 dB in 0.5 dB steps 2 x 7 W + 1 x 15 W operation, or one parallel full-bridge Programmable Peak Detect and Limiter channel for 1 x 30 W operation. The CS4525 integrates 2-Channel Logic-level PWM Output on-chip over-current, under-voltage, and over-tempera- ture protection and error reporting as well as a thermal Programmable Channel Mapping warning indicator and programmable foldback of the Can Drive an External PWM Amplifier, output power to allow cooling. Headphone Amplifier, or Line-out Amplifier The main digital serial port on the CS4525 can support Integrated Headphone Detection asynchronous operation with the integrated on-chip Flexible Power Output Configurations sample rate converter (SRC) which eases system inte- Thermal Foldback for Interruption-free gration. The SRC allows for a fixed PWM switching Power-stage Protection frequency regardless of incoming sample rate as well Supports Internal and External Power as optimal clocking for the A/D modulators. Stages An on-chip oscillator driver eliminates the need for an Operation from On-chip Oscillator Driver or external crystal oscillator circuit, reducing overall design Applied Systems Clock cost and conserving circuit board space. The CS4525 automatically uses the on-chip oscillator driver in the Supports IC Host Control Interface absence of an applied master clock. Hardware Mode System Features The CS4525 is available in a 48-pin QFN package in 2-Channel Stereo Full Bridge Power Outputs Commercial grade (0 to +70 C). The CRD4525-Q1 4- Analog and Digital Inputs layer, 1 oz. copper and CRD4525-D1 2-layer, 1 oz. cop- per customer reference designs are also available. IS and Left-justified Serial Input Formats Thermal Foldback for Interruption-free Please refer to Ordering Information on page 97 for Protection of Internal Power Stage complete ordering information. Operation from Applied Systems Clock External Mute Input 2 DS726PP3