CS4385_07 Datasheet, PDF (1/55 Pages) Cirrus Logic – 114 dB, 192 kHz 8-Channel D/A Converter

CS4385
114 dB, 192 kHz 8-Channel D/A Converter
Features
 Advanced Multi-bit Delta Sigma Architecture
 24-bit Conversion
 Automatic Detection of Sample Rates up to
192 kHz
 114 dB Dynamic Range
 -100 dB THD+N
 Direct Stream Digital Mode
– Non-Decimating Volume Control
– On-Chip 50 kHz Filter
– Matched PCM and DSD Analog Output
Levels
 Compatible with Industry-Standard Time
Division Multiplexed (TDM) Serial Interface
 Selectable Digital Filters
 Volume Control with 1/2-dB Step Size and Soft
Ramp
 Low Clock Jitter Sensitivity
 +5 V Analog Supply, +2.5 V Digital Supply
 Separate 1.8 to 5 V Logic Supplies for the
Control & Serial Ports
Description
The CS4385 is a complete 8-channel digital-to-analog
system. This D/A system includes digital de-emphasis,
half-dB step size volume control, ATAPI channel mix-
ing, selectable fast and slow digital interpolation filters
followed by an oversampled, multi-bit delta sigma mod-
ulator which includes mismatch-shaping technology
that eliminates distortion due to capacitor mismatch.
Following this stage is a multi-element switched capac-
itor stage and low-pass filter with differential analog
outputs.
The CS4385 also has a proprietary DSD processor
which allows for volume control and 50 kHz on-chip fil-
tering without an intermediate decimation stage. It also
offers an optional path for direct DSD conversion by di-
rectly using the multi-element switched capacitor array.
The CS4385 is available in a 48-pin LQFP package in
both Commercial (-40° to +85°) and Automotive
(-40° to +105°) grades. The CDB4385 Customer Dem-
onstration board is also available for device evaluation
and implementation suggestions. Please see “Ordering
Information” on page 54 for complete details.
The CS4385 accepts PCM data at sample rates from
4 kHz to 216 kHz, DSD audio data, and delivers excel-
lent sound quality. These features are ideal for multi-
channel audio systems, including SACD players, A/V
receivers, digital TV’s, mixing consoles, effects proces-
sors, sound cards, and automotive audio systems.
C ontrol Port Supply = 1.8 V to 5 V
Digital Supply = 2.5 V
A nalog Supply = 5 V
Hardware Mode or
I²C /SP I S oftw are Mode
C ontrol Data
Reset
Serial A udio Port
Supply = 1.8 V to 5 V
PC M Serial
A udio Input
TDM Serial
A udio Input
DSD A udio
In p u t
R e g iste r/H a rd wa re
C onfiguration
Inte rna l Voltage
Re fe rence
V o lume
8 C ontrols
D igita l
F ilters
Multi-bit ∆Σ
Modula tors
DSD Proce ssor
-Volume control
-50 kHz filter
Switch-C ap
DAC and
Analog F ilte rs
8
E ight C hannels
of Differential
O utp u ts
8
E xte rna l Mute
C ontrol
2
Mute Signals
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Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
APRIL '07
DS671F1