DATA SHEET
Part No.
Package Code No.
AN12974A
XLGA032-L-0505
SEMICONDUCTOR COMPANY
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Publication date: May 2004
SDC00058AEB
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AN12974A
Contents
Overview ……………………………………………………………………………………………………………. 3
Features ……………………………………………………………………………………………………………. 3
Applications ………………………..………………………………………………………………………………. 3
Package ……………………………………………………………………………………………………………. 3
Type …………………………………………………………………………………………………………………. 3
Application Circuit Example ………………………………………………………………………………………. 4
Pin Descriptions ……………………………………………………………………………………………………. 5
The Mode Table
…….……………………………………………………………………………………………. 5
Absolute Maximum Ratings ………………………………………………………………………………………. 6
Operating Supply Voltage Range
Electrical Characteristics
………..………………..……………………………………………………. 6
………..………………………………………………………………………………. 7
…………………………………………….……………. 8
Electrical Characteristics (Design Reference Data)
Test Circuit Diagram
………….………….………………………………………………………………………. 9
Measure Method of Electrical Characteristics ………….………………………………………………………. 10
Technical Data
……………………………………………………………………………………………………. 11
The power and logic timing ………..……………………………………………………………………………. 14
The power timing of V
CC
and V
CC-SP
……………………………………………………………………………. 14
Pin 6: AGC on/off switch terminal ………………………………………………………………………………. 14
Pin 32: 3D surround spatializer
on/off switch
….……………………………………………………………. 14
Output power when AGC is on …………………………………………………………………………………. 15
Amplifier output wave pattern ..…………………………………………………………………………………. 16
Power dissipation of package XLGA032-L-0505
Main characteristics
Usage Notes
……………………………………………………………. 17
……………………………….…………………………………………………………… 17
………………………………………………………………………………………………………. 30
……………………………………………………………………………………………. 30
Licensing Agreement
Package Outline …………………..………………………………………………………………………………. 31
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AN12974A
AN12974A
Stereo power amplifier with built-in AGC circuitry and SPATIALIZER
The AN12974A audio power amplifier features built-in AGC circuitry and Spatializer
environ.
The Spatializer
environ is Desper Products, Inc.'s exclusive signal processing technology that is able to generate surround sound
for low-power mobile applications. The technology is based on the company’s commercial 3D audio production system, PRO-
Spatializer
Audio Production System. The AN12974A IC employs the same innovative technology of the PRO-Spatializer
Audio
Production System to enhance sound for products with close proximity speakers such as those on headphones and cellular phones to
expand the soundfield for a much more spacious sound.
Overview
Features
Delivers spacious 3D sound for a stereo system with such as cellular phones' speakers in close proximity.
The AGC circuitry can activate to minimize distortion, raising the average volume level and it can prevent speaker from breaking
when an input level is too high.
High output BTL power amplifier, when AGC is on, speaker output: 700mW
(V
CC-SP
= 4.2 V, RL = 8
Ω,
when AGC is on, the rate of the output wave pattern's distortion would be approximately 1%)
Operating supply voltage: V
CC
= 2.55 V to 3.5 V, V
CC-SP
= 2.55 V to 4.5 V
Applications
Cellular phones, PDAs and portable DVD players
Spatializer
environ
provides a dramatic,
surround sound effect
with just two speakers
Speaker
Speaker
1
4
7
*
2
5
8
0
3
6
9
#
Portable DVD Player
Package
32-pin fine pitch land grid array package (XLGA type)
Type
Silicon monolithic bipolar IC
Note) Spatializer
and the circle-in-square device trademark are owned by Desper Products, Inc.
Products and specifications are subject to change without notice.
Please ask for the latest Product Standards to guarantee the satisfaction of your product requirements.
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AN12974A
Application Circuit Example
SPATIALIZER
output
V
CC-SP
(L)
Cellular phones
C = 22 000 pF or 18 000 pF
R = 2.2 kΩ
Portable DVD players
C=56 000 pF
R=10 kΩ to 20 kΩ
C
25
10 kΩ
0.1
µF
100 kΩ 2.2
µF
10 kΩ
0.47
µF
4 700 pF
1µF
V
CC
Off
1 000 pF
22
21
0 dB
1
µF
24
23
−34
dBV
20
−34
dBV
19
18
17
STB
SW
16
On
+7
dB
R
1
µF
27
SPATIALIZER
−40
dBV
−27
dBV
AGC
+13
dB
14
GND
SPL
0.1
µF
26
−6
dB
+6
dB
+
15
Speaker
8
Ω
L-channel
V
CC
1
µF
AGC
det.
+13
dB
12
+13
dB
In
R-channel 0.1
µF
−34
dBV
30
−6
dB
31
−40
dBV
+6
dB
AGC
+7
dB
−27
dBV
11
GND
SPR
0.1
µF
29
+
0.1
µF
IN
L-channel
−34
dBV 0.1
µF
28
13
−
Speaker
8
Ω
R-channel
10
+13
dB
−34
dBV
V
CC
On
Off
1
SPATIALIZER
SW
4 700 pF
2
32
−34
dBV
0 dB
Timing
cont.
6
7
1
µF
9
V
CC
8
SP save
SW
1
µF
3
0.1
µF
4
1 000 pF
5
0.1
µF
−
Off
On
10 kΩ
10 kΩ
On
V
CC
V
CC-SP
(R)
AGC
SW
SPATIALIZER
output
Off
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AN12974A
Pin Descriptions
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Description
Surround filter terminal r-channel 1
Surround filter terminal r-channel 2
Surround output r-channel
Gain adjustment reflection amplifier output r-channel
Gain adjustment reflection amplifier output r-channel
AGC on/off switch
Pre-charge timing condenser terminal
V
CC-SP
r-channel
Speaker power save on/off switch
Speaker output r-channel (−)
GND (Spesker r-channel)
Speaker output r-channel (+)
Speaker output l-channel (−)
GND (Speaker l-channel)
Speaker output l-channel (+)
All standby on/off switch
Pin
No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
V
CC-SP
(L-channel)
1/2 V
CC-SP
(V
REF-SP
)
AGC detecting terminal
Gain adjustment reflection amplifier output l-channel
Gain adjustment reflection amplifier output l-channel
Surround output l-channel
Surround filter terminal l-channel 2
Surround filter terminal l-channel 1
Surround effect adjustment 1
Surround effect adjustment 2
1/2 V
CC
(V
REF
)
Audio input terminal l-channel
V
CC
Audio input terminal r-channel
GND
Surround on/off switch
Description
The mode table
Mode
Pin No.
32
6
9
16
Function
Low
Surround on/off switch
AGC on/off switch
Speaker power save on/off
switch
All standby on/off switch
Off
Off
On
On
High
On
On
Off
Off
On/off of spatializer
function is controlled.
On/off of AGC function for speaker is controlled.
On/off of power amplifier for speaker is controlled.
On/off of all functions of IC is controlled.
Explanation of operation
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