CS4245/CS5345 Product Bulletin

CS4245/CS5345
3.3 V to 5 V
Reset
9.0 mm
9.0 mm
IC dimensions
(nominal — pins included)
High-End Performance at
Affordable Prices
• 24-bit conversion, up to 192 kHz
sample rates
• Advanced multi-bit Delta-Sigma
architecture
• 105 dB dynamic range
• –95 dB THD+N
• Analog input multiplexer, 6 stereo pairs
and pass-through mode
• PGA: ±12 dB gain, 0.5 dB step sizes
with zero crossing
• Microphone pre-amp with +32 dB gain
and low-noise bias supply
• Digital volume control
• Popguard technology reduces output
clicks and pops
• Single-ended architecture
• +3.3 V or +5.0 V power supply
operation
• Integrated level shifters for direct
interface to DSP or µC
• Overflow detection
• HPF with defeat
• Support for asynchronous ADC and DAC
sample rates
• Pin-compatible
• 48-pin LQFP, lead-free assembly
• CS4245 CODEC price: $2.45 (10K)
• CS5345 ADC price: $1.95 (10K)
Serial
Audio
Output
PCM Serial Interface
Volume
Control
Interpolation
Filter
3.3 V to 5 V
Multibit
Modulator
Switched Capacitor
DAC and Filter
Left DAC Output
Mute
Control
Volume
Control
Interpolation
Filter
Multibit
Modulator
Switched Capacitor
DAC and Filter
Mute Control
Right DAC Output
MUX
Register Configuration
PCM Serial Interface
Interrupt
ADC Overflow
Level Translator
I2C/SPI
Control Data
Level
Translator
Serial
Audio
Input
Level
Translator
1.8 V to 5 V
Left Aux Output
Right Aux Output
Internal Voltage
Reference
Stereo Input 1
Stereo Input 2
Stereo Input 3
High Pass
Filter
Linear Phase
Anti-Alias Filter
Multibit
Oversampling
ADC
PGA
High Pass
Filter
Linear Phase
Anti-Alias Filter
Multibit
Oversampling
ADC
PGA
MUX
+32 dB
Stereo Input 4 /
Mic Input 1 & 2
+32 dB
Stereo Input 5
Stereo Input 6
CS4245
New Highly Integrated Stereo CODEC & ADC
Provide Premium Audio Performance
Innovative Designs Minimize Board Space Requirements and Lower Total BOM Costs
The new CS4245 stereo CODEC and CS5345
stereo ADC are pin-compatible, highly integrated
audio converters designed for emerging audio
and video applications such as DVD recorders
and home theatre products. The pair strengthens
the Cirrus Logic mixed-signal audio IC portfolio
and provides designers with an integrated
solution that streamlines product development,
reduces overall design complexity and cost, and
delivers premium audio performance.
The 24-bit, 192 kHz stereo DAC in the CS4245
is also based on a multi-bit Delta-Sigma architecture, includes digital attenuation, and provides high quality single-ended outputs with
Cirrus Logic’s patented Popguard technology to
eliminate power cycling clicks and pops, further
reducing the number of external components
required. The sample rates for the ADC and
DAC in the CS4245 can be independent of each
other for flexibility is system configuration.
The front-end of both the CS4245 and CS5345
features an integrated analog input selector to
accommodate up to 6 stereo audio sources.
Also included is a programmable gain amplifier
capable of ±12 dB analog gain in 0.5 dB step
sizes with zero crossing, click-free transitions to
maintain sonic quality. One pair of inputs has a
dedicated microphone pre-amplifier in its path
that provides +32 dB of gain, and there is also a
low-noise microphone bias supply available.
The CS4245 and CS5345 operate from either
a +3.3 V or +5 V power supply and have +1.8 V
to +5 V logic power supplies for the control and
serial port to allow for direct interface to external
processors or micro-controllers without level
shifting.
A multi-bit Delta-Sigma stereo A/D converter
provides 24-bit conversion and output sample
rates up to 192 kHz. A high-pass filter is included
for DC offset removal, and a dedicated pin is
available for detecting overflow conditions.
Applications
Engineered for performance, this new CODEC
and ADC pair delivers professional audio quality
at a breakthrough price point.
• DVD recorders
• DVD receivers
• Digital video recorders/personal video recorders
• Digital televisions
• Set-top boxes and home media centers
• Automotive entertainment systems
• Home theatre products
• PC sound cards
www.cirrus.com
C i r r u s L o g i c , I n c . · 2 9 0 1 V i a F o r t u n a · A u s t i n T X 7 8 74 6 U S A · T 5 1 2 - 8 5 1 - 4 0 0 0 · T 8 0 0 - 8 8 8 - 5 0 1 6 · F 5 1 2 - 8 5 1 - 4 9 7 7
Product Bulletin 0138-0604-PB-LP © 2004 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, Popguard, and Leading the Digital
Entertainment Revolution are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.