CS4270
24-Bit, 192-kHz Stereo Audio CODEC
D/A Features A/D Features
High Performance High Performance
105 dB Dynamic Range
105 dB Dynamic Range
-95 dB THD+N
-87 dB THD+N
Multi-bit Conversion
Selectable Serial Audio Interface Formats
High-Pass Filter to Remove DC Offsets
Left-Justified up to 24 bits
Selectable Serial Audio Interface Formats
IS up to 24 bits
Left-Justified up to 24 bits
Right-Justified 16, and 24 bits
IS up to 24 bits
Control Output for External Muting
Single-Ended Input
System Features
Digital De-Emphasis
Direct Interface with Logic Levels 1.8 V to 5 V
Popguard Technology
Internal Digital Loopback
Multi-bit Conversion Stand-Alone or Serial Control Port Functionality
Single-Ended Analog Architecture
Digital Volume Control
Supports all Audio Sample Rates from 4 kHz to
216 kHz
Single-Ended Output
3.3- or 5-V Core Supply
VLC VD VA
1.8 V to 5 V 3.3 V to 5 V 3.3 V to 5 V
Software or
Internal Voltage
Level
Stand-Alone
Configuration
Reference
Configuration Translators
Registers
____
RST
External Mute
Mute Signals
Control
DAC
Switch-Cap
Volume Multi-bit Analog Out A
Digital DAC and
Control Modulator (Left)
Analog Filter
Serial Filter
PCM Serial
Audio
Audio Input
Input
DAC Switch-Cap
Volume Multi-bit Analog Out B
Digital DAC and
Control Modulator (Right)
Analog Filter
Filter
ADC
High Pass Switch-Cap Analog Input A
Digital
Filter (Left)
ADC
Serial Filter
PCM Serial
Audio
Audio Output
Output
ADC
High Pass Analog Input B
Switch-Cap
Digital
Filter ADC (Right)
Filter
Copyright Cirrus Logic, Inc. 2010 AUGUST '10
(All Rights Reserved)
CS4270
Stand-Alone Mode Feature Set General Description
System Features
The CS4270 is a high-performance, integrated audio
CODEC. The CS4270 performs stereo analog-to-digital
Master or Slave Serial Audio Interface
(A/D) and digital-to-analog (D/A) conversion of up to
Single-, Double-, or Quad-Speed Operation
24-bit serial values at sample rates up to 216 kHz.
D/A Features
Standard 50/15 s de-emphasis is available for sam-
pling rates of 44.1 kHz for compatibility with digital audio
Auto-Mute on Static Samples
programs mastered using the 50/15 s pre-emphasis
44.1 kHz 50/15 s De-emphasis Available
technique.
Selectable Serial Audio Interface Formats
Integrated level translators allow easy interfacing be-
tween the CS4270 and other devices operating over a
Left-Justified up to 24-bit
wide range of logic levels.
IS up to 24-bit
Independently addressable high-pass filters are avail-
able for the right and left channel of the A/D. This allows
A/D Features
the A/D to be used in a wide variety of applications
High-Pass Filter
where one audio channel and one DC measurement
Selectable Serial Audio Interface Formats channel is desired.
Left-Justified up to 24-bit The CS4270 is available in a 24-pin TSSOP package
(-10 to +70 C). The CDB4270 Customer Demonstra-
IS up to 24-bit
tion board is also available for device evaluation and
implementation suggestions. Please refer to Ordering
Software Mode Feature Set
Information on page44 for complete ordering
information.
System Features
The CS4270s wide dynamic range, negligible distor-
Master or Slave Serial Audio Interface
tion, and low noise make it ideal for applications such as
Single-, Double-, or Quad-Speed Operation
DVD recorders, digital televisions, set-top boxes, and
effects processors.
Internal Digital Loopback Available
D/A Features
Selectable Auto-mute
44.1-kHz 50/15 s De-emphasis Available
Configurable Muting Controls
Volume Control
Selectable Serial Audio Interface Formats
Left-Justified up to 24-bit
IS up to 24-bit
Right-Justified 16, and 24-bit
A/D Features
Selectable High-Pass Filter or DC Offset
Calibration
Selectable Serial Audio Interface Formats
Left-Justified up to 24-bit
IS up to 24-bit
2 DS686F1