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PDF CS4385A Data sheet ( Hoja de datos )
| Número de pieza | CS4385A | |
| Descripción | 192-kHz 8-Channel D/A Converter | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS4385A
114-dB, 192-kHz 8-Channel D/A Converter
Features
Description
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® (DSD) 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 in
both Hardware and Software Modes
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
The CS4385A 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 CS4385A also has a proprietary DSD processor
that allows for volume control and 50 kHz on-chip filter-
ing 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 CS4385A is available in a 48-pin LQFP package in
both Commercial (-40°C to +85°C) and Automotive
(-40°C to +105°C) grades. Please see “Ordering Infor-
mation” on page 53 for complete details.
The CS4385A accepts PCM data at sample rates from
4 kHz to 216 kHz, Direct Stream Digital audio data, and
delivers excellent sound quality. These features are ide-
al for multi-channel audio systems, including SACD
players, A/V receivers, digital TV’s, mixing consoles, ef-
fects processors, sound cards, and automotive audio
systems.
Control Port Supply = 1.8 V to 5 V
Digital Supply = 2.5 V
Analog Supply = 5 V
Hardware Mode or
I2C/SPI Software Mode
Control Data
Reset
Serial Audio Port
Supply = 1.8 V to 5 V
PCM Serial
Audio Input
TDM Serial
Audio Input
DSD Audio
Input
Register/Hardware
Configuration
Internal Voltage
Reference
Volume
8 Controls
Digital
Filters
Multi-bit
Modulators
DSD Processor
-Volume control
-50 kHz filter
Switch-Cap
DAC and
Analog Filters
8
Eight Channels
of Differential
Outputs
8
External Mute
Control
2
Mute Signals
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2014
(All Rights Reserved)
APRIL '14
DS837F2
1 page  
CS4385A
LIST OF TABLES
Table 1. Single-Speed Mode (SSM) Standard Frequencies ..................................................................... 21
Table 2. Double-Speed Mode (DSM) Standard Frequencies ................................................................... 21
Table 3. Quad-Speed Mode (QSM) Standard Frequencies ...................................................................... 21
Table 4. PCM Digital Interface Format, Hardware Mode Options ............................................................. 22
Table 5. Mode Selection, Hardware Mode Options .................................................................................. 22
Table 6. Direct Stream Digital (DSD), Hardware Mode Options ............................................................... 22
Table 7. Digital Interface Formats - PCM Mode ........................................................................................ 39
Table 8. Digital Interface Formats - DSD Mode ........................................................................................ 39
Table 9. ATAPI Decode Table .................................................................................................................. 46
Table 10. Example Digital Volume Settings .............................................................................................. 47
DS837F2
5
5 Page 
POWER AND THERMAL CHARACTERISTICS
CS4385A
Parameters
Symbol Min Typ Max Units
Power Supplies
Power Supply Current
(Note 4)
Power Dissipation (Note 4)
normal operation, VA= 5 V
VD= 2.5 V
(Note 5) Interface current, VLC=5 V
VLS=5 V
(Note 6) power-down state (all supplies)
VA = 5 V, VD = 2.5 V
normal operation
(Note 6) power-down
IA
ID
ILC
ILS
Ipd
- 84 91 mA
- 20 25 mA
- 2 - A
- 75 -
A
- 200 -
A
-
470 520
mW
- 1 - mW
Package Thermal Resistance
Power Supply Rejection Ratio (Note 7)
multi-layer
dual-layer
JA
JA
JC
- 48 - °C/Watt
- 65 - °C/Watt
- 15 - °C/Watt
(1 kHz)
(60 Hz)
PSRR
-
-
60
40
-
-
dB
dB
Notes:
4.
5.
6.
7.
Current consumption increases with increasing Fs within a given speed mode and is signal dependent.
Max values are based on highest Fs and highest MCLK.
ILC measured with no external loading on the SDA pin.
Power-Down Mode is defined as RST pin = Low with all clock and data lines held static.
Valid with the recommended capacitor values on FILT+ and VQ as shown in Figures 7 and 8.
DS837F2
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CS4385A.PDF ] | |
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