CS42L51
Cirrus Logic, Inc. · 2901 Via Fortuna · Austin TX 78746 USA · T 512-851-4000 · T 800-888-5016 · F 512-851-4977
Product Bulletin 0167-0605-PB-LP © 2005 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic is a trademark of Cirrus Logic, Inc.
Other brand and product names may be trademarks or service marks of their respective owners.
CS42L51 Delivers
Advanced Performance
•Low power audio CODEC
•Stereo playback:12 mW @ 1.8 V
•Stereo record and playback:
20 mW @ 1.8 V
•Operates from a single1.8 V or 2.5 V supply
•Analog inputs
•3:1 stereo input selector
•PGA, +12 dBto –3 dB in0.5 dB steps
•+32 dB or +16 dB stereo microphone
pre-amp with biassupply
•Automatic level control with
overflow detection
•Analog outputs
•98 dB dynamic range
•Configurable as stereo headphone
or line level outputs
•Ground centered outputs – no DC
blocking capacitors required
•Up to 88 mW into stereo
16 Ωheadphones (2.5 V)
•Upto 46 mW into stereo
16 Ωheadphones (1.8 V)
•Digital signal processing engine
•Digital bass & treble tone control
•Programmable peak signal detect & limiter
•Digital volumecontrol with soft
ramp&zero cross
•On-chip beep generation
•-88 dB THD+N (-75 dB with HP load)
•24-bit conversion, up to 96 kHz
sample rates
•Flexible power down management –
chip/block selectable
•CS42L51, 32L-QFN, lead-free assembly,
price: $3.95 (1K)
The CS42L51 delivers excellent audio
performance while providing portable
device developers with an innovative
solution that maximizes battery life while
minimizing end-product form factors.
The CS42L51’s key distinction is that it
operates from a single, 1.8V power supply
for low-power consumption, yet delivers
plenty of output power, 46mW, into stereo
16 ohm headphones for a great listening
experience. This highly integrated 24-bit,
96 kHz stereo CODEC is based on a
multi-bit Delta-Sigma architecture which
allows infinite sample rate adjustment
between 4 kHz and 100 kHz.
By generating its own on-chip negative
power supply voltage, the CS42L51
provides ground-centered outputs, which
eliminates costly, space-consuming DC
blocking capacitors that some competing
solutions require. The elimination of
these capacitors not only reduces the
implementation cost but it also greatly
simplifies product design and saves
valuable circuit board space.
•Hard-disc drive & Flash-based portable
audio players
•Personal media players
•Mini-disc players and recorders
•PDA’s & smart phones
•Digital cameras & camcorders
•Digital voice recorders
•Wireless headsets
•Guitar effects pedals
•Portable audio recording systems
•Portable gaming systems
This next-generation CODEC is an ideal
choice for any portable audio product
developer. For complete, up-to-date
specifications and to download the product
datasheet, visit our web site today.
Highly Integrated Stereo CODEC Ideal for
Portable, Low-Power Digital Audio Applications
5mm
IC dimensions
(pin-to-pin nominal)
32L-QFN
5mm
CS42L51
Minimizes Player Component Count, Size & Cost Applications
www.cirrus.com
1.8 V to 3.3 V
Multibit
Modulator
Charge
Pump
Left HP Out
Right HP Out
Multibit
Oversampling
ADC
Multibit
Oversampling
ADC
Serial Audio
Input
Serial Audio
Output
1.8 V to 2.5 V 1.8 V to 2.5 V
MUX
PGA
PCM Serial Interface
Register
Configuration
Level Translator
Reset
Hardware Mode
or I
2
C & SPI
Software Mode
Control Data
Stereo Input 1
Stereo Input 2
Stereo Input 3 /
Mic Input 1 & 2
PGA
+32 dB
+32 dB
Volume
Controls
BEEP
Generator
MUX
MUX
Headphone
Amp - GND
Centered
Headphone
Amp - GND
Centered
ALC
MIC
Bias
1.8 V to 2.5 V
MUX
MUX
Switched
Capacitor DAC
and Filter
Switched
Capacitor DAC
and Filter
High Pass
Filters
ALC
Signal
Processing
Engine
