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PDF CS3308 Data sheet ( Hoja de datos )
| Número de pieza | CS3308 | |
| Descripción | 8-Channel Analog Volume Control | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS3308
8-Channel Analog Volume Control
Features
Complete Analog Volume Control
– 8 Independently Controllable Channels
– 3 Configurable Master Volume and Muting
Controls
Wide Adjustable Volume Range
– -96 dB to +22 dB in ¼ dB Steps
Low Distortion & Noise
– -112 dB THD+N
– 123 dB Dynamic Range
Noise-Free Level Transitions
– Zero-Crossing Detection with
Programmable Time-Out
Low Channel-to-Channel Crosstalk
– 120 dB Inter-Channel Isolation
Comprehensive Serial Control Port
– Supports I²C® and SPITM Communication
– Independent Control of up to 128 Devices
on a Shared 2-Wire I²C or 3-Wire SPI
Control Bus
– Supports Individual and Grouped Control of
all CS3308 Devices on the I²C or SPI
Control Bus
Standard Power Supply Voltages
– ±5 V Analog Supply
– +3.3 V Digital Supply
Description
The CS3308 is an 8-channel digitally controlled analog
volume control designed specifically for high-end audio
systems. It features a comprehensive I²C/SPI serial
control port for easy device and volume configuration.
The CS3308 includes arrays of well-matched resistors
and complementary low-noise active output stages. A
total adjustable range of 118 dB, in ¼ dB steps, is
spread evenly over 96 dB of attenuation and 22 dB of
gain.
The CS3308 implements configurable zero-crossing
detection to provide glitch-free volume-level changes.
The I²C/SPI control interface provides for easy system
integration of up to 128 CS3308 devices over a single 2-
wire I²C or 3-wire SPI bus, allowing many channels of
volume control with minimal system controller I/O re-
quirements. Devices may be controlled on an individual
and grouped basis, simplifying simultaneous configura-
tion of a group of channels across multiple devices,
while allowing discrete control over all channels on an
individual basis.
The device operates from ±5 V analog supplies and has
an input/output voltage range of ±3.65 V. The digital
control interface operates at +3.3 V.
The CS3308 is available in a 48-pin LQFP package in
Commercial grade (-10° to 70° C). The CS3308 Cus-
tomer Demonstration board is also available for device
evaluation. Refer to “Ordering Information” on page 44
for complete details.
8-Channel
Analog
Inputs
I²C/SPI
Serial
Control
±5 V
8
+3.3 V
I²C / SPI
Control
Port
Zero Crossing
Detector
+
_
8-Channel
8 Analog
Outputs
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
DECEMBER '06
DS702F1
1 page  
1. PIN DESCRIPTIONS
CS3308
48 47 46 45 44 43 42 41 40 39 38 37
IN1
REFI1
RESET
MUTE
SCL/CCLK
SDA/MOSI
AD0/CS
ENOut
DGND
VD
REFI8
IN8
1
2
3
4
5
6
7
8
9
10
11
12
CS3308
36 VA-
35 VA+
34 OUT4
33 REFO4
32 IN4
31 REFI4
30 REFI5
29 IN5
28 REFO5
27 OUT5
26 VA-
25 VA+
13 14 15 16 17 18 19 20 21 22 23 24
Pin Name
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
# Pin Description
1
42
39
32 Analog Inputs (Input) - The full-scale level is specified in the Analog Characteristics specification
29 table.
22
19
12
DS702F1
5
5 Page 
CS3308
CONTROL PORT SWITCHING CHARACTERISTICS - SPI™ FORMAT
(Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF)
Parameter
CCLK Clock Frequency
RESET Rising Edge to CS Falling
CS High Time Between Transmissions
CS Falling to CCLK Edge
CCLK Low Time
CCLK High Time
CDIN to CCLK Rising Setup Time
CCLK Rising to DATA Hold Time
Rise Time of CCLK and CDIN
Fall Time of CCLK and CDIN
(Note 8)
(Note 9)
(Note 9)
Symbol
fsck
tsrs
tcsh
tcss
tscl
tsch
tdsu
tdh
tr2
tf2
Min
0
100
1.0
20
66
66
40
15
-
-
Max
6.0
-
-
-
-
-
-
-
100
100
Unit
MHz
ns
μs
ns
ns
ns
ns
ns
ns
ns
8. Data must be held for sufficient time to bridge the transition time of CCLK.
9. For fsck <1 MHz.
RESET
t srs
CS
t css
CCLK
t scl t sch
t r2 t f2
MOSI
t dsu
t dh
Figure 2. Control Port Timing - SPI Format
t csh
DS702F1
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CS3308.PDF ] | |
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