CS42L55-DNZ Cirrus Logic Inc, CS42L55-DNZ Datasheet - Page 2

• Manufacturer Part Number: CS42L55-DNZ
• Description: IC CODEC STER H-HDPN AMP 36-QFN
• Manufacturer: Cirrus Logic Inc
• Type: Stereo Audior

Specifications of CS42L55-DNZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 1 / 1
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 95 / 99
• Voltage - Supply, Analog: 1.65 V ~ 2.71 V
• Voltage - Supply, Digital: 1.65 V ~ 2.71 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1506 - BOARD EVAL FOR CS42L55 CODEC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

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SYSTEM FEATURES
APPLICATIONS
High Performance 24-bit Converters
Integrated High Efficient Power Management
Reduces Power Consumption
Digital Power Reduction
Power Down Management
Analog & Digital Routing/Mixes
I²C
I²S Digital Interface Format
Flexible Clocking Options
HDD & Flash-Based Portable Audio Players
MD Players/Recorders
PDAs
Personal Media Players
Portable Game Consoles
Digital Voice Recorders
Digital Camcorders
Digital Cameras
Smart Phones
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Multi-bit Delta Sigma Architecture
Step-Down Charge Pump Improves
Efficiency
Inverting Charge Pump Accommodates
Low System Voltage by Providing Negative
Rail for HP/Line Amp
LDO Reg. Provides Low Digital Supply
Voltage
Very Low Oversampling Rate for
Converters
Bursted Serial Clock Providing 24 Bits per
Sample
ADC, DAC, CODEC, PGA, DSP
Line/Headphone Out = Analog In (ADC
Bypassed)
Line/Headphone Out = ADC Out
Internal Digital Loopback
Mono Mixes
Master or Slave Operation
High-Impedance Digital Output Select
(used for easy MUXing between CODEC
and other data sources)
8.000, 11.029, 12.000, 16.000, 22.059,
24.000, 32.000, 44.118 and 48.000 kHz
Sample Rates
Control Port
GENERAL DESCRIPTION
The CS42L55 is a highly integrated, 24-bit, ultra-low
power stereo CODEC based on multi-bit delta-sigma
modulation. Both the ADC and DAC offer many features
suitable for low power portable system applications.
The analog input path allows independent channel
control of a variety of features. The Programmable Gain
Amplifier (PGA) provides analog gain with zero cross
transitions. The ADC path includes a digital volume at-
tenuator with soft ramp transitions and a programmable
ALC and noise gate monitor the input signals and adjust
the volume appropriately. An analog passthrough also
exists, accommodating a lower noise, lower power ana-
log in to analog out path to the headphone and line
amplifiers, bypassing the ADC and DAC.
The DAC output path includes a fixed-function digital
signal processing engine. Tone control provides bass
and treble adjustment at four selectable corner frequen-
cies. The digital mixer provides independent volume
control for both the ADC output and PCM input signal
paths, as well as a master volume control. Digital vol-
ume controls may be configured to change on soft ramp
transitions while the analog controls can be configured
to occur on every zero crossing. The DAC path also in-
cludes de-emphasis, limiting functions and a beep
generator delivering tones selectable across a range of
two full octaves.
The Class H stereo headphone amplifier combines the
efficiency of an integrated step-down and inverting
charge pump with the linearity and low EMI of a Class
AB amplifier. A step-down/inverting charge pump oper-
ates in two modes: +/-VCP mode or +/-(VCP/2) mode.
Based on the amplifier’s output signal, internal logic au-
tomatically adjusts the output of the charge pump,
+VHPFILT and –VHPFILT, to optimize efficiency. With
these features, the amplifier delivers a ground-centered
output with a large signal swing even at low voltages
and eliminates the need for external DC-blocking
capacitors.
These features make the CS42L55 the ideal solution for
portable applications that require extremely low power
consumption in a minimal amount of space.
The CS42L55 is available in a 36-pin QFN package for
the Commercial (-40°C to +85°C) grade. The
CDB42L55 Customer Demonstration board is also
available for device evaluation and implementation sug-
gestions. Please see
for complete details.
“Ordering Information” on page 73
CS42L55
DS773F1