Cirrus Logic CS4271 - Manual

Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
Cirrus Logic, Inc.
www.cirrus.com
CS4271
24-Bit, 192 kHz Stereo Audio CODEC
D/A Features
! High Performance
– 114 dB Dynamic Range
– -100 dB THD+N
! Up to 192 kHz Sampling Rates
! Differential Analog Architecture
! Volume Control with Soft Ramp
– 1 dB Step Size
– Zero Crossing Click-free Transitions
! Selectable Digital Filters
– Fast and Slow Roll Off
! ATAPI Mixing Functions
! Selectable Serial Audio Interface Formats
– Left Justified up to 24-bit
– I
2
S up to 24-bit
– Right Justified 16-, 18-, 20-, and 24-Bit
! Control Output for External Muting
! Selectable 50/15
µs De-emphasis
A/D Features
! High Performance
– 108 dB Dynamic Range
– -98 dB THD+N
! Up to 192 kHz Sampling Rates
! Single-Ended Analog Architecture
! Multi-bit Delta Sigma Conversion
! High-pass Filter or DC Offset Calibration
! Low-Latency Digital Anti-alias Filtering
! Automatic Dithering of 16-bit Data
! Selectable Serial Audio Interface Formats
– Left Justified up to 24-bit
– I
2
S up to 24-bit
System Features
! Direct Interface with 5V to 2.5V Logic Levels
! Internal Digital Loopback
! On-chip Oscillator
! Stand-Alone or Control Port Functionality
2.5 V to 5 V
Left and
Right Mute
Controls
∆Σ Modulator
∆Σ Modulator
Low-Latency
Anti-Alias Filter
External
Mute Control
Register / Hardware
Configuration
Internal Voltage
Reference
Internal
Oscillator
Volume
Control
Mi
x
e
r
Selectable
Interpolation
Filter
Selectable
Interpolation
Filter
Reset
Left
Differential
Output
Right
Differential
Output
Switched Capacitor
DAC and Filter
Multibit
Oversampling
ADC
Multibit
Oversampling
ADC
Low-Latency
Anti-Alias Filter
High Pass Filter &
DC Offset Calibration
High Pass Filter &
DC Offset Calibration
PCM
S
e
ri
al
In
te
rf
ac
e
/
Loo
pba
c
k
Left Input
Right Input
Volume
Control
Le
vel
T
ra
n
sl
at
or
Lev
e
l Tra
n
s
lat
or
Serial
Audio
Input
Serial
Audio
Output
3.3 V to 5 V 5 V
Hardware or
I 2 C/SPI
Control Data
Switched Capacitor
DAC and Filter
AUGUST '05
DS592F1