ICs for Audio Common Use
AN7399S
Spatializer sound processor IC
I
Overview
A spatializer audio processor is the Desper Inc.'s
proprietary signal processing technology exclusively
developed for the consumer electronics and multi-
media market. It is based on the Desper's profes-
sional 3D audio production system "PRO-
Spatializer". You can enjoy a sound enhancement and
extension effect with the conventional two-speaker
stereo system by using the innovative technology
adopted in this equipment.
16
10.09±0.20
9
Unit: mm
4.30±0.20
6.40±0.30
0.15
–0.05
+0.10
0° to 10°
0.50±0.20
(0.60)
1.27
0.40±0.10
I
Features
•
Fewer external parts (minimum parts count: 4)
•
Wide operating supply voltage: 4.5 V to 10 V
•
A sound source in the center position is necessarily
positioned in center regardless of the spatializer
effect value.
Seating plane
0.65±0.10
0.10±0.10
0.65±0.10
1.50±0.20
1
8
Seating plane
SOP016-P-0225C
Note) The package of this product will be changed to lead-free type
(SOP016-P-0225F). See the new package dimensions section
later of this datasheet.
I
Applications
•
Radio cassette recorder, stereo-sound TV and
VCR, personal computer, active speaker
I
Pin Assignment
SPON/OFF
LCNF2
LCNF1
LOUT
LIN1
LIN2
16
15
14
13
12
11
10
R
1
2
3
4
5
6
7
RCNF2
ROUT
GND
V
REF
RCNF1
RIN1
Note) Spatializer
and the device trademark of circle-in-square
are owned by Desper Products Inc.
This product can be used with the consent of the Desper Products Inc.
Under the terms of the agreement between Matsushita Electric and Desper Products Inc., no technical information on the
Spatializer, which is applied to this product, shall be provided.
RIN2
N.C.
8
9
N.C.
V
CC
Publication date: November 2001
SDC00028BEB
1
AN7399S
I
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
RCNF1
RIN1
RIN2
GND
V
REF
RCNF2
ROUT
N.C.
Description
Pin No.
9
10
11
12
13
14
15
16
N.C.
LOUT
LCNF1
SPON/OFF
V
CC
LIN2
LIN1
LCNF2
Description
I
Absolute Maximum Ratings
Parameter
Supply voltage
Supply current
Power dissipation
Operating ambient temperature
*
Storage temperature
*
Symbol
V
CC
I
CC
P
D
T
opr
T
stg
Rating
10.5
3.0
31.5
−25
to
+75
−55
to
+150
Unit
V
mA
mW
°C
°C
Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
= 25°C.
I
Recommended Operating Range
Parameter
Supply voltage
Symbol
V
CC
Range
4.5 to 10.0
Unit
V
I
Electrical Characteristics at V
CC
=
9 V, freq.
=
1 kHz, T
a
=
25°C
Parameter
Off mode gain
*1
Off mode total harmonic distortion
*1
On mode total harmonic distortion
*1
Off mode output residual noise
*2
On mode output residual noise
*2
Crosstalk (off mode)
*1
Maximum input level (off mode)
*1
Total circuit current at no load
Off mode changeover voltage
On mode changeover voltage
Note) *1: Use DIN audio filter.
*2: Use A-characteristic curve filter.
Symbol
VFFG
THD
FF
THD
ON
N
FF
N
ON
CT
V
MAX
I
TOTAL
V
OFF
V
ON
Conditions
V
IN
=
1 V[rms], f
=
1 kHz
V
IN
=
1 V[rms], f
=
1 kHz
V
IN
=
0.4 V[rms], f
=
1 kHz
V
IN
=
0 mV[rms], R
G
=
4.7 kΩ
V
IN
=
0 mV[rms], R
G
=
4.7 kΩ
V
IN
=
1 V[rms], f
=
1 kHz
THD
=
1%, f
=
1 kHz
V
IN
=
0 mV[rms]
Min
−1
2.0
0.8
0.0
2.7
Typ
0
0.01
0.02
5
7
−95
2.4
1.4
Max
1
0.05
0.1
15
20
−75
2.0
0.5
V
CC
Unit
dB
%
%
µV[rms]
µV[rms]
dB
V[rms]
mA
V
V
2
SDC00028BEB
AN7399S
I
Terminal Equivalent Circuits
Pin No.
1
2
Symbol
RCNF1
RIN1
Equivalent circuit
Description
Capacitor pin 1
R-ch. input pin 1
Voltage
4.5 V
4.5 V
2
1 kΩ
50 kΩ
1/2V
CC
3
RIN2
R-ch. input pin 2
4.5 V
3
1 kΩ
50 kΩ
1/2V
CC
4
5
GND
V
REF
GND pin
Reference voltage stabiliz-
ing pin
50 kΩ
0V
4.5 V
5
50 kΩ
6
7
RCNF2
ROUT
Capacitor pin 2
R-ch. output pin
4.5 V
4.5 V
500
Ω
7
8
9
N.C.
N.C.
SDC00028BEB
3
AN7399S
I
Terminal Equivalent Circuits (continued)
Pin No.
10
Symbol
LOUT
Equivalent circuit
Description
L-ch. output pin
Voltage
4.5 V
500
Ω
10
11
12
LCNF1
SPON/OFF
Capacitor pin 3
Mode changeover pin
4.5 V
V
CC
to 2.7 V /
0.5 V to 0 V
500
Ω
12
13
14
V
CC
LIN1
Supply pin
L-ch. input pin 1
V
CC
4.5 V
14
1 kΩ
50 kΩ
1/2V
CC
15
LIN2
L-ch. input pin 2
4.5 V
15
1 kΩ
50 kΩ
1/2V
CC
16
LCNF2
Capacitor pin 4
4.5 V
4
SDC00028BEB
AN7399S
SPON/OFF
I
Application Circuit Example
Change a resistance
value for variation of
space effect
10
µF
LIN
V
CC
100
µF
4.7 nF
LCNF1
0
Ω
to 50 kΩ
LCNF2
LIN1
LIN2
10
µF
LOUT
16
15
14
13
12
11
10
56 nF
1
2
3
4
5
6
10
µF
V
REF
7
8
N.C.
RIN1
RIN2
RCNF1
RCNF2
4.7 nF
10
µF
10
µF
RIN
GND
I
Conceptual Description on Spatializer Operation
•
Stereo normal mode
All sound are heard from between both left and right
speakers.
•
Conventional surround system
Sound expands outside the speakers but the sound
position is not stable.
•
Spatializer
The sound expands outside the two speakers and
the sound position is stable.
The sound come to have its expansion and depth.
And also, a sound source in the center position is
necessarily positioned in center regardless of the
spatializer effect value.
I
Usage Notes
1. Do not apply 0.3 V or more to pin 12 because it relates with pin 13 (V
CC
pin)
2. If more than 0.3 V is applied to pin 12, the current flows to pin 13 (V
CC
pin) via a surge protection diode connected
to pin 12.
ROUT
9
N.C.
SDC00028BEB
5
京公网安备 11010802033920号
EEWORLD
