CS4525
30 W Digital Audio Amplifier with Integrated ADC
Digital Amplifier Features
ADC Features
Stereo, 24-bit, 48 kHz Conversion
Multi-bit Architecture
Fully Integrated Power MOSFETs
No Heatsink Required
95 dB Dynamic Range (A-wtd)
-86 dB THD+N
–
Programmable Power Foldback on
Thermal Warning
–
High Efficiency
Supports 2 Vrms Input with Passive
Components
> 100 dB Dynamic Range
< 0.1% THD+N @ 1 W
System Features
Asynchronous 2-channel Digital Serial Port
32 kHz to 96 kHz Input Sample Rates
Operation with On-chip Oscillator Driver or
Applied SYS_CLK at 18.432, 24.576 or
27.000 MHz
Configurable Outputs (10% THD+N)
–
–
–
1 x 30 W into 4 Ω, Parallel Full-Bridge
2 x 15 W into 8 Ω, Full-Bridge
2 x 7 W into 4 Ω, Half-Bridge + 1 x 15 W
into 8 Ω, Full-Bridge
Integrated Sample Rate Converter (SRC)
Built-In Protection with Error Reporting
–
–
–
Eliminates Clock-jitter Effects
Input Sample Rate Independent Operation
Simplifies System Integration
–
Overcurrent / Undervoltage / Thermal
Overload Shutdown
–
Thermal Warning Reporting
Spread Spectrum PWM Modulation
Reduces EMI Radiated Energy
PWM Popguard® for Half-Bridge Mode
–
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
Processing
Amplifier
Out 1
Gate
Drive
PWM
Crystal Driver
I/O
Crystal Oscillator Driver
Parametric EQ
High-Pass
Amplifier
Out 2
Gate
Drive
Stereo
Analog In
Multi-bit ∆Σ ADC
Multi-bit ∆Σ
Modulator
Bass/Treble
Adaptive
Loudness
Compensation
Serial Audio
Clocks & Data
Serial Audio Input Port
with
Gate
Drive
2-Ch Mixer
Amplifier
Out 3
Integrated
Sample Rate
Converter
2.1 Bass Mgr
Serial Audio
Delay Interface
Serial Audio
Data I/O
Serial Audio
Clocks & Data
Linkwitz-Riley
Crossover
Amplifier
Out 4
Gate
Drive
Auxiliary Serial Port
De-Emphasis
Volume
HP Detect/Mute
PGND
Error Protection
PWM Modulator
Output 1
Reset
Register /Hardware
Configuration
Over Current
Under Voltage
Interrupt
Thermal Warning
Thermal Feedback
PWM Modulator
Output 2
I²C or Hardware
Configuration
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
Copyright © Cirrus Logic, Inc. 2008
JUL '08
DS726PP3
(All Rights Reserved)
http://www.cirrus.com