CS4525
30 W Digital Audio Amplifier with Integrated ADC
Digital Amplifier Features
Fully Integrated Power MOSFETs
No Heatsink Required
– Programmable Power Foldback on
Thermal Warning
– High Efficiency
> 100 dB Dynamic Range
< 0.1% THD+N @ 1 W
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
Built-In Protection with Error Reporting
– Overcurrent / Undervoltage / Thermal
Overload Shutdown
– Thermal Warning Reporting
PWM Popguard
®
for Half-Bridge Mode
Click-free Start-up
Programmable Channel Delay for System
Noise & Radiated Emissions Management
2.5 V to 5 V
ADC Features
Stereo, 24-bit, 48 kHz Conversion
Multi-bit Architecture
95 dB Dynamic Range (A-wtd)
-86 dB THD+N
Supports 2 Vrms Input with Passive
Components
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
Integrated Sample Rate Converter (SRC)
– Eliminates Clock-jitter Effects
– Input Sample Rate Independent Operation
– Simplifies System Integration
Spread Spectrum PWM Modulation
– Reduces EMI Radiated Energy
Low Quiescent Current
(Features continued on
8 V to 18 V
VP
System Clock
Crystal Driver
I/O
Stereo
Analog In
Serial Audio
Clocks & Data
Serial Audio
Data I/O
Serial Audio
Clocks & Data
HP Detect/Mute
Reset
Interrupt
I²C or Hardware
Configuration
Crystal Oscillator Driver
Audio
Processing
Parametric EQ
High-Pass
PWM
Gate
Drive
Gate
Drive
Amplifier
Out 1
Multi-bit
∆Σ
ADC
Serial Audio Input Port
Serial Audio
Delay Interface
Auxiliary Serial Port
Bass/Treble
Adaptive
Loudness
Compensation
2-Ch Mixer
2.1 Bass Mgr
Linkwitz-Riley
Crossover
De-Emphasis
Volume
Multi-bit
∆Σ
Modulator
with
Integrated
Sample Rate
Converter
Amplifier
Out 2
Gate
Drive
Amplifier
Out 3
Gate
Drive
Amplifier
Out 4
PGND
Error Protection
Register /Hardware
Configuration
Thermal Warning
Thermal Feedback
Over Current
Under Voltage
PWM Modulator
Output 1
PWM Modulator
Output 2
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
©
Cirrus Logic, Inc. 2008
(All Rights Reserved)
JUL '08
DS726PP3
CIRRUS [ CIRRUS LOGIC ]
