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PDF SSM-2005 Data sheet ( Hoja de datos )
| Número de pieza | SSM-2005 | |
| Descripción | SSM2005 | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SSM-2005 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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a
® Decoder
5.1-Channel Soundfield Generator
SSM2005
FEATURES
Generates 5.1-Channel Soundfield from All Stereo Sources
No Pre-Encoding Required
Excellent Decoding of Pre-Encoded Sources
4- or 5-Speaker Operation
Subwoofer Output
Full Bandwidth on All Channels
Optimized Modes for Video and Music
Excellent Surround Image at All Positions
Independent Left and Right Surround Steering
No Surround Channel Delay Required
Built-In White Noise Generator
APPLICATIONS
www.DataHShoemete4UT.hcoemater Receivers
VCD/DVD Players
Auto Sound Receivers and Amplifiers
Surround Sound Decoders
Karaoke
Computer Audio Boards
Video Games
GENERAL DESCRIPTION
The SSM2005 Circle Surround® decoder produces true 5.1-channel
surround soundfield from any stereo source, including VCD, DVD,
VCR, CD and FM stereo broadcasts. The SSM2005 is also compat-
ible with encoded sources, such as Dolby ProLogic® and Circle
Surround encoded movies and music. External delays and noise
reduction processors are not required for the surround channels.
Circle Surround encoded stereo signals will produce a full 360º
soundfield when played through the SSM2005. Recording engi-
neers can encode sounds to any of the five speakers surrounding
the listener. Left Front, Right Front, Center, and differentiated
Left and Right surround channels are generated, providing a realis-
tic ambiance effect with either 4- or 5-speaker configurations.
The SSM2005 is available from Analog Devices, subject to the
License and Royalty requirements as described on the following
page of the data sheet.
PIN CONFIGURATIONS
48-Lead SSOP
(RS Suffix)
R FILTER IN 1
48 CENTER OUT
R FILTER OUT 2
47 LF OUT
L FILTER IN 3
46 RF OUT
L FILTER OUT 4
45 LS OUT
L OUT 5
44 RS OUT
L OUT A 6
43 NOISE IN
L IN 7
42 NOISE OUT
R OUT 8
41 LOAD
R OUT A 9
40 RESET
R IN 10
39 DATA IN
VEE 11
38 VCC
ACOM AUDIO GND 12 SSM2005 37 ACOM AUDIO GND
GND
13
TOP VIEW
(Not to Scale)
36
GND
VCC 14
35 VEE
(L+R) OUT 15
34 WRITE
(L–R) OUT 16
33 CLOCK IN
(L–R) HIGH IN 17
32 FRONT/REAR TC FILTER
(L–R) LOW IN 18
31 LOW BAND TC FILTER
R HIGH BAND DET. 19
30 HIGH BAND TC FILTER
L HIGH BAND DET. 20
29 FRONT/REAR DET.
HIGH BAND DET. OUT 21
28 FRONT/REAR (L–R) DET.
R LOW BAND DET. 22
27 FRONT/REAR (L+R) DET.
L LOW BAND DET. 23
26 AUTOBALANCE LOCKOUT
LOW BAND DET. OUT 24
25 AUTOBALANCE TC
INPUTS
LEFT
RIGHT
ANALOG
SIGNAL
PROCESSING
STEERING
CONTROL
GENERATOR
STEERING MATRIX
AND OUTPUT
AMPLIFIERS
MODE CONTROL
LOGIC AND NOISE
GENERATOR
OUTPUTS
LEFT
RIGHT
CENTER
LEFT
SURROUND
RIGHT
SURROUND
L+R FOR
SUBWOOFER
RESET
SERIAL BUS
Figure 1. Simplified Block Diagram
and are registered trademarks of SRS Labs, Inc. and ValenceTechnology Ltd.
Circle Surround is a registered trademark of SRS Labs, Inc. and Valence Technology Ltd.
Dolby ProLogic is a registered trademark of Dolby Laboratories Licensing Corporation, San Francisco, California.
Circle Surround technology is protected under one or more of the following U.S. Patents and corresponding patents
worldwide: 5,319,713; 5,333,201; 5,638,452; 5,771,295.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
1 page  
www.DataSheet4U.com
PIN CONFIGURATIONS
48-Lead SSOP
(RS Suffix)
R FILTER IN 1
48 CENTER OUT
R FILTER OUT 2
47 LF OUT
L FILTER IN 3
46 RF OUT
L FILTER OUT 4
45 LS OUT
L OUT 5
44 RS OUT
L OUT A 6
43 NOISE IN
L IN 7
42 NOISE OUT
R OUT 8
41 LOAD
R OUT A 9
40 RESET
R IN 10
39 DATA IN
VEE 11
38 VCC
ACOM AUDIO GND 12 SSM2005 37 ACOM AUDIO GND
GND
13
TOP VIEW
(Not to Scale)
36
GND
VCC 14
35 VEE
(L+R) OUT 15
34 WRITE
(L–R) OUT 16
33 CLOCK IN
(L–R) HIGH IN 17
32 FRONT/REAR TC FILTER
(L–R) LOW IN 18
31 LOW BAND TC FILTER
R HIGH BAND DET. 19
30 HIGH BAND TC FILTER
L HIGH BAND DET. 20
29 FRONT/REAR DET.
HIGH BAND DET. OUT 21
28 FRONT/REAR (L–R) DET.
R LOW BAND DET. 22
27 FRONT/REAR (L+R) DET.
L LOW BAND DET. 23
26 AUTOBALANCE LOCKOUT
LOW BAND DET. OUT 24
25 AUTOBALANCE TC
SSM2005
REV. 0
–5–
5 Page 
SSM2005
TYPICAL OUTPUTS IN VARIOUS MODES
The SSM2005 Circle Surround decoder uses ambiance and
directional information already present in a stereo signal, and
does not require the audio signal to be encoded. The device
requires no delay generators or noise reduction. Fully differenti-
ated rear channels provide rear stereo separation for enhanced
spatial perception, a feature unique to Circle Surround.
Video mode provides the highest degree of channel separation
between the front and center speakers. Video mode cancels com-
mon center channel material from the left and right front chan-
nels. This restores a wide stereo image to matrix encoded sound
tracks, while maintaining a solid center channel for dialogue and
mono information.
The Music mode is optimized for unencoded stereo music repro-
duction, with full bandwidth on all channels. The steering for the
LF and RF channels is deactivated to prevent any stereo image
wandering. The independent two-band rear channel steering
provides excellent surround imaging, even in car audio applica-
www.DatitoanSsh.eWet4elUl .bcaolmanced sound is obtained everywhere within a 4- or
5-speaker setup.
The 5.2.5 mode provides the maximum channel separation to
the surround channels, and should be used with any encoded
stereo input signal. The 4.2.4 mode can be used to reduce the
dynamic steering of the surround channels, allowing the
SSM2005 to simulate a 4-channel surround sound decoder.
Sound Spread OFF allows the maximum channel separation
between the surround and front speakers. With Sound Spread
OFF, a hard panned left input signal will produce an output
only in the left front output. In Sound Spread ON mode, a hard
panned left input signal will produce equal output from the left
front and left surround outputs.
The following tables demonstrate the differences between the
modes of the SSM2005 under various input conditions. The LT
and RT inputs are at 2 kHz, and are shown in terms of their
differences in magnitude (in dB) and phase (in degrees). For
example, a 0␣ Є 180° input means LT is exactly equal in magni-
tude, but opposite in phase to RT.
Table V. Video/5.2.5/Sound Spread OFF/Center ON
Input
|LT| – |RT|
dB Є φ
0 Є 0°
0 Є 180°
LT Only
RT Only
–6 Є 0°
–6 Є 180°
Output
(dB)
|LF| |RF|
– 30 –30
–35 –35
0 –60
–60 0
0 –15
–30 –36
|C|
+6
–45
–30
–30
–4
–26
|LS|
–40
+6
–30
–35
–25
0
|RS|
–40
+6
–35
–30
–30
–15
Table VI. Video/5.2.5/Sound Spread ON/Center ON
Input
|LT| – |RT|
dB Є φ
0 Є 0°
0 Є 180°
LT Only
RT Only
–6 Є 0°
–6 Є 180°
Output
(dB)
|LF| |RF|
– 30 –30
–35 –35
0 –60
–60 0
0 –15
–30 –36
|C|
+6
–45
–30
–30
–4
–26
|LS|
–40
+6
0
–30
0
0
|RS|
–40
+6
–30
0
–25
–15
Table VII. Music/5.2.5/Sound Spread ON/Center ON
Input
|LT| – |RT|
dB Є φ
0 Є 0°
0 Є 180°
LT Only
RT Only
–6 Є 0°
–6 Є 180°
Output
(dB)
|LF| |RF|
00
00
0 –60
–60 0
0 –6
0 –6
|C|
+2
–45
–30
–30
–4
–26
|LS|
–40
+6
0
–30
0
0
|RS|
–40
+6
–30
0
–25
–15
Table VIII. Video/5.2.5/Sound Spread ON/Phantom Center
Input
|LT| – |RT|
dB Є φ
0 Є 0°
0 Є 180°
LT Only
RT Only
–6 Є 0°
–6 Є 180°
Output
(dB)
|LF| |RF|
+3 +3
–35 –35
0 –60
–60 0
0 –15
–30 –36
|C|
Off
Off
Off
Off
Off
Off
|LS|
–40
+6
0
–30
0
0
|RS|
–40
+6
–30
0
–25
–15
Table IX. Video/4.2.4/Sound Spread OFF/Center ON
Input
|LT| – |RT|
dB Є φ
0 Є 0°
0 Є 180°
LT Only
RT Only
–6 Є 0°
–6 Є 180°
Output
(dB)
|LF| |RF|
– 30 –30
–35 –35
0 –60
–60 0
0 –15
–30 –36
|C|
+6
–45
–30
–30
–4
–26
|LS|
–40
+6
–32
–32
–26
0
|RS|
–40
+6
–32
–32
–26
–2
REV. 0
–11–
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet SSM-2005.PDF ] | |
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