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CDB4384 Schematic ( PDF Datasheet ) - Cirrus Logic

Teilenummer CDB4384
Beschreibung 192 kHz 8-Channel D/A Converter
Hersteller Cirrus Logic
Logo Cirrus Logic Logo 




Gesamt 30 Seiten
CDB4384 Datasheet, Funktion
www.DataSheet4U.com
CS4384
103 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
 103 dB Dynamic Range
 -88 dB THD+N
 Single-Ended Output Architecture
 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
 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 and Serial Ports
Description
The CS4384 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. Follow-
ing this stage is a multi-element switched capacitor
stage and low-pass filter with single-ended analog
outputs.
The CS4384 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 CS4384 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 re-
ceivers, digital TV’s, mixing consoles, effects
processors, and sound cards.
This product is available in 48-pin LQFP package in
Commercial (-40°C to +85°C) temperature grade. See
“Ordering Information” on page 51 for complete details.
C ontrol Port Supply = 1.8 V to 5 V
Digital Supply = 2.5 V
A nalog Supply = 5 V
Hardware Mode or
I2C /SPI Softw are Mode
Control 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 giste r/H a rdwa re
C onfiguration
Internal Voltage
R e fe re nce
V olume
8 C ontrols
D igita l
F ilters
Multi-bit ∆Σ
Modula tors
Switch-C ap
DAC and
Analog F ilters
E ight C hannels
of Single-E nded
8 Outputs
DSD Processor
-Volume control
-50 kHz filter
E xternal Mute
C ontrol
2
Mute Signals
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
MAY '08
DS620F1






CDB4384 Datasheet, Funktion
1. PIN DESCRIPTION
DSD3
DSD2
DSD1
VD
GND
MCLK
LRCK
SDIN1
SCLK
M4(TST)
SDIN2
M3(TST)
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
6
CS4384
31
7 30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
TST_OUT
AOUT3
AOUT4
TST_OUT
VA
GND
TST_OUT
AOUT5
AOUT6
TST_OUT
TST_OUT
AOUT7
CS4384www.DataSheet4U.com
Pin Name
VD
GND
MCLK
LRCK
SDIN1
SDIN2
SDIN3
SDIN4
SCLK
VLC
RST
FILT+
VQ
MUTEC1
MUTEC234
# Pin Description
4
Digital Power (Input) - Positive power supply for the digital section. Refer to the Recommended
Operating Conditions for appropriate voltages.
5
31
Ground (Input) - Ground reference. Should be connected to analog ground.
6
Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters. Table 1 illus-
trates several standard audio sample rates and the required master clock frequencies.
7
Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the serial
audio data line. The frequency of the left/right clock must be at the audio sample rate, Fs.
8
11
13
Serial Data Input (Input) - Input for two’s complement serial audio data.
14
9 Serial Clock (Input) - Serial clocks for the serial audio interface.
Control Port Power (Input) - Determines the required signal level for the control port and hard-
18 ware mode configuration pins. Refer to the Recommended Operating Conditions for appropriate
voltages.
19
Reset (Input) - The device enters a low power mode and all internal registers are reset to their
default settings when low.
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling cir-
20 cuits. Requires the capacitive decoupling to analog ground as shown in the Typical Connection
Diagram.
21 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
41 Mute Control (Output) - These pins are intended to be used as a control for external mute circuits
22 on the line outputs to prevent the clicks and pops that can occur in any single supply system.
6 DS620F1

6 Page









CDB4384 pdf, datenblatt
CS4384www.DataSheet4U.com
COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE
(CONTINED)
Parameter
Single-Speed Mode - 48 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
De-emphasis Error (Note 11)
(Relative to 1 kHz)
Double-Speed Mode - 96 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
Quad-Speed Mode - 192 kHz
Passband (Note 9)
Frequency Response
StopBand
StopBand Attenuation
Group Delay
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
Fs = 32 kHz
Fs = 44.1 kHz
Fs = 48 kHz
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
to -0.01 dB corner
to -3 dB corner
10 Hz to 20 kHz
(Note 10)
Slow Roll-Off (Note 8)
Min Typ Max
0
0
-0.01
.583
64
-
-
-
-
-
-
-
-
-
7.8/Fs
-
-
-
0.417
0.499
+0.01
-
-
-
±0.36
±0.21
±0.14
0
0
-0.01
.792
70
-
-
-
-
-
-
5.4/Fs
.296
.499
+0.01
-
-
-
0
0
-0.01
.868
75
-
-
-
-
-
-
6.6/Fs
.104
.481
+0.01
-
-
-
Unit
Fs
Fs
dB
Fs
dB
s
dB
dB
dB
Fs
Fs
dB
Fs
dB
s
Fs
Fs
dB
Fs
dB
s
DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSE
DSD Processor Mode
Passband (Note 9)
Frequency Response
Roll-off
Direct DSD Mode
Passband (Note 9)
Parameter
Frequency Response 10 Hz to 20 kHz
to -3 dB corner
10 Hz to 20 kHz
to -0.1 dB corner
to -3 dB corner
Min
0
-0.05
27
0
0
-0.1
Typ
Max
Unit
- 50 kHz
-
+0.05
dB
- - dB/Oct
- 26.9 kHz
-
176.4
kHz
- 0 dB
12 DS620F1

12 Page





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