AP8111 SRS TruBass Audio Enhancement Processor
AP8111 \
SRS TruBass Audio Enhancement Processor
AP8111 SRS TruBass Audio Enhancement Processor
Table of Content
1. OVERVIEW.......................................................................................................... 1 2. FEATURES.......................................................................................................... 1 3. APPLICATIONS .................................................................................................. 1 4. ORDERING INFORMATION ............................................................................... 1 5. PIN CONFIGURATION........................................................................................ 1 6. DEVICE PIN OUT AND PIN DESCRIPTION ....................................................... 2 7. APPLICATION CIRCUIT ..................................................................................... 3 8. ABSOLUTE MAXIMUM RATINGS...................................................................... 4 9. ELECTRICAL CHARACTERISTICS ................................................................... 5 10. PACKAGE INFORMATION ................................................................................. 6
AP8111 SRS TruBass Audio Enhancement Processor
4. ORDERING INFORMATION
1. OVERVIEW The AP8111 is a bass enhancement processor based on SRS Labs’ patented TruBass technology.
PART NUMBER
PINS
PACKAGE
AP8111-SO-L
24
SOP
TruBass enhances bass performance by utilizing proprietary
psychoacoustic
techniques.
The
AP8111 creates low frequency fundamental tones that is highly suitable for portable devices with speaker smaller in size.
2. FEATURES
5. PIN CONFIGURATION
Operating Voltage: 2.5V to 5.5V Operating Temperature: 0 oC to 70 oC TruBass Function TruBass Level Control Bass Gain Control Bypass Function Bandpass filter options for different speaker
sizes
3. APPLICATIONS Mini or Micro Stereo Sound System Boombox
RIN
1
24
LIN
TBGAIN
2
23
VCC
CL2B
3
22
MODE
CB3
4
21
LOUT
CB3B
5
20
ROUT
CB2
6
19
COMPI
CB2B
7
18
MULTIN
CB1B
8
17
COMPC2
CB1
9
16
FWRIN
BP1B
10
15
BP2B
VREF
11
14
BP2
VREFB
12
13
GND
MP3 Docking Speaker System AP8111-SO-L
TV Set Portable DVD Player
Revision 2.4
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September 22, 2006
AP8111 SRS TruBass Audio Enhancement Processor 6. DEVICE PIN OUT AND PIN DESCRIPTION PIN #
PIN NAME
DESCRIPTION
1
RIN
2
TBGAIN
3
CL2B
Left and Right Channels Mixed Output
4
CB3
Center Bandpass Filter3 Input
5
CB3B
6
CB2
7
CB2B
Center Bandpass Filter2 Output
8
CB1B
Center Bandpass Filter1 Output
9
CB1
10
BP1B
TruBass Bandpass Filter1 Output
11
VREF
Reference Voltage Input
12
VREFB
13
GND
Ground
14
BP2
TruBass Bandpass Filter2 Input
15
BP2B
16
FWRIN
17
COMPC2
TruBass Compressor Capacitor Output
18
MULTIN
Not Used
19
COMPI
TruBass Compressor Input
20
ROUT
Right Channel Audio Output
21
LOUT
Left Channel Audio Output
TruBass Right Input TruBass Gain Control TBGAIN = VCC : 0dB TruBass Gain TBGAIN = Gnd : 6dB TruBass Gain
Center Bandpass Filter3 Output Center Bandpass Filter2 Input
Center Bandpass Filter1 Input
Reference Voltage Output
TruBass Bandpass Filter2 Output TruBass Punch Control
TRUBASS/BYPASS/POWERDOWN Mode Selection MODE = Float : BYPASS Mode MODE = Gnd : POWERDOWN Mode MODE = VCC : TRUBASS Mode
22
MODE
23
VCC
Positive Power Supply
24
LIN
TruBass Left Input
Revision 2.4
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Revision 2.4
0.1U C7
0.1U C6
R 18
Page 3 of 7 R27
C12 4.7U
+6dB 1 RIN 2 TBGAIN 3 CL2B 4 CB3 5 CB3B 6 CB2 7 CB2B 8 CB1B 9 CB1 10 BP1B 11 VREF 12 VREFB
0.1U C5
0.1U C4 R14
24 LIN 23 VCC 22 MODE 21 LOUT 20 ROUT 19 COMPI 18 MULTIN 17 COMPC2 16 FWRIN 15 BP2B 14 BP2 13 GND
AP8111
R 33
R25
R23
4.7U C1
R21
R19
4.7U C0 SW1
0dB
SW2
R16
4.7U C 15
R17
R2
TruBass bypass (open) powerdown
100K
Right Audio Input
R1 R 32
RIN
LIN
Left Audio Input
VR
10k linear
C13 10U
ROUT
C14 4.7U
Right Audio Output
LOUT
Left Audio Output
AP8111
SRS TruBass Audio Enhancement Processor
7. APPLICATION CIRCUIT
4.7U C 16
0.1U C 11
0.1U C 10
100K
0.1U C3
0.1U C2
R 22
R 26
September 22, 2006
AP8111 SRS TruBass Audio Enhancement Processor Application Notes 1.
Tolerance of all resistors = 1%
2.
Tolerance of capacitors C2, C3, C4, C5, C6, C7, C10, C11, C13 = 5%
3.
R32, R33 should be added only when the chip’s operating voltage is below 3.3V.
4.
R1, R2 is used for attenuating the input signal fed into AP8111.
5.
The TruBass filter setting depends on the resonant frequency (fo) of the speaker. Choose different filter settings in accordance with fo of the speaker for the actual application. FILTERS SETTING FOR TruBass 100Hz 120Hz 150Hz
fo
40Hz
60Hz
80Hz
R14 R16
40.2k 40.2k
26.7k 26.7k
20k 20k
15.8k 15.8k
13.3k 13.3k
R17
56.2k
37.4k
28k
22.6k
R18
12.1k
8.06k
6.04k
200Hz
250Hz
300Hz
400Hz
10.7k 10.7k
7.87k 7.87k
6.34k 6.34k
5.36k 5.36k
4.02k 4.02k
18.7k
15k
11.3k
9.09k
7.5k
5.62k
4.87k
4.02k
3.24k
2.43k
1.91k
1.62k
1.21k
R19
158k
107k
78.7k
63.4k
53.6k
42.2k
31.6k
25.5k
21k
15.8k
R21
44.2k
30.1k
22.1k
17.8k
15k
11.8k
8.87k
7.15k
6.65k
5.36k
R22
7.87k
5.23k
3.92k
3.09k
2.61k
2.1k
1.54k
1.24k
1.18k
931
R23
107k
71.5k
53.6k
42.2k
35.7k
28k
21k
16.9k
15.8k
12.7k
R25
40.2k
26.7k
20k
15.8k
13.3k
10.7k
7.87k
6.34k
6.34k
5.36k
R26
5.62k
3.83k
2.87k
2.26k
1.91k
1.5k
1.13k
909
909
750
R27
78.7k
53.6k
40.2k
31.6k
26.7k
21k
15.8k
12.7k
12.7k
10.7k
8. ABSOLUTE MAXIMUM RATINGS Under no circumstances the absolute maximum ratings given below should be violated. Stresses exceeding one or more of the limiting values may cause permanent damage to the device. PARAMETER
SYMBOL
RATING
UNIT
Supply Voltage
VCC
6
V
Power Dissipation
Pd
70
mW
Operating Temperature Range
Topr
0 to 70
o
C
-20 to 100
o
C
Storage Temperature Range
Revision 2.4
Tstg
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September 22, 2006
AP8111 SRS TruBass Audio Enhancement Processor 9. ELECTRICAL CHARACTERISTICS [VCC=3.3V, Ta=25oC, VIN= - 20dBV(100mVrms), 100Hz TruBass filter setting, maximum Punch unless otherwise specified] TEST CONDITION PARAMETER
SYMBOL
IN
DESCRIPTION Operating Voltage Supply Current Reference Voltage Maximum Input Voltage
VCC
ICC
VREF
OUT
MODE
MIN.
TYP.
MAX.
UNIT
L
R
-
-
-
-
2.5
3.3
5.5
V
0
0
-
PD
-
4
15
μA
0
0
-
BYPASS
-
5
11
0
0
-
TruBass
-
5
11
No Signal
0
0
-
-
0.5 VCC
f=1kHz THD=3%
VIN
-
L
BYPASS
VCC
-
VIN
R
f=100Hz 6dB TruBass Gain
VIN
VIN
L
VIN
VIN
R
BW=20kHz
0
0
-
No Signal
VM
L
mA
V
TruBass
-
-8 (0.4)
-
BYPASS
-
-
-100
-
-
-80
-
-
-80
TruBass
11
13
15
BYPASS
-
-
0.02
TruBass
-
-
0.1
dBV (Vrms)
R Output Noise
TruBass Gain
VNO
GBASS
BW=20kHz No TruBass Gain
0
BW=20kHz 6dB TruBass Gain
0
f=100Hz 0dB TruBass Gain
f=1kHz No TruBass Gain Total Harmonic Distortion
THD f=100Hz No TruBass Gain
Switch Control Voltage
Revision 2.4
0
L R
0
dBV
TruBass
L R
VIN
-
L
-
VIN
R
VIN -
VIN
L R
VIN
VIN
L
VIN
VIN
R
VIN
-
L
-
VIN
R
VIN
VIN
L
VIN
VIN
R
dB
% BYPASS
-
-
0.03
TruBass
-
-
0.3
VIH
Pin 2,22
-
-
-
-
2
-
-
VIL
Pin 2,22
-
-
-
-
-
-
1
V
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AP8111 SRS TruBass Audio Enhancement Processor 10. PACKAGE INFORMATION
Order Part Number AP8111-SO-L Revision 2.4
Page 6 of 7
September 22, 2006
AP8111 SRS TruBass Audio Enhancement Processor
Valence Semiconductor Design Limited Unit 2001, 20/F., APEC Plaza, 49 Hoi Yuen Road, Kwun Tong, Hong Kong Tel: (852) 2797 3288 Fax: (852) 2776 7770 Email:
[email protected] Website: http://www.valencetech.com is a registered trademark of Valence Semiconductor Design Limited. The SRS TruBass Technology rights in the AP8111 are owned by SRS Labs, Inc. a United States Corporation and licensed to Valence Semiconductor Design Ltd. SRS is protected under US and foreign patents issued and/or pending. The symbol is a trademark of SRS Labs, Inc. in the United State and selected foreign countries. Neither the purchase of the AP8111, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS technology. SRS Labs requires all set makers to comply with all rules and regulations as outlined in the SRS Trademark Usage Manual separately provided. IMPORTANT NOTICE “Preliminary” product information describes products that are in production, but for which full characterization data is not yet available. ValenceTech Ltd. and its affiliates (“Valence”) believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by Valence for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Valence and by furnishing this information, Valence grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Valence owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Valence integrated circuits or other products of Valence. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the “Foreign Exchange and Foreign Trade Law” is to be exported or taken out of Japan. An export license and /or quota needs to be obtained from the competent authorities of the Chinese Government if any of the products or technologies described in this material is subject to the PRC Foreign Trade Law and is to be exported or taken out of the PRC. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). VALENCE PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT SYSTEMS OR COMPONENTS AND PERSONAL OR AUTOMOTIVE SAFETY OR SECURITY DEVICES). INCLUSION OF VALENCE PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND VALENCE DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY VALENCE PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF VALENCE PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY VALENCE, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Purchasers of Valence products must enter into a license agreement directly with SRS Labs if the royalty for the use of the SRS technologies is not included in the Valence purchase price. Neither the purchase of a Valence product nor the license of SRS products conveys the right to sell commercialized recordings made with any Valence or SRS technologies. Valence, SRS Labs, SRS, and the SRS Labs logo designs are trademarks of SRS Labs, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners.
Revision 2.4
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September 22, 2006
