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PDF LM4610N Data sheet ( Hoja de datos )
| Número de pieza | LM4610N | |
| Descripción | Dual DC Operated Tone/Volume/Balance Circuit with National 3-D Sound | |
| Fabricantes | National Semiconductor | |
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May 1999
LM4610
Dual DC Operated Tone/Volume/Balance Circuit with
National 3-D Sound
General Description
The LM4610 is a DC controlled tone (bass/treble), volume
and balance circuit for stereo applications in car radio, TV
and audio systems. It also features National’s 3D-Sound Cir-
cuitry which can be externally adjusted via a simple RC Net-
work. An additional control input allows loudness compensa-
tion to be simply effected.
Four control inputs provide control of the bass, treble, bal-
ance and volume functions through application of DC volt-
ages from a remote control system or, alternatively, from four
potentiometers which may be biased from a zener regulated
supply provided on the circuit.
Each tone response is defined by a single capacitor chosen
to give the desired characteristic.
Features
n National 3-D Sound
n Wide supply voltage range, 9V to 16V
n Large volume control range, 75 dB typical
n Tone control, ±15 dB typical
n Channel separation, 75 dB typical
n Low distortion, 0.06% typical for an input level of 0.3
Vrms
n High signal to noise, 80 dB typical for an input level of
0.3 Vrms
n Few external components required
Block and Connection Diagram
Dual-In-Line Package
Order Number LM4610N
See NS Package Number N24A
DS101125-1
© 1999 National Semiconductor Corporation DS101125
www.national.com
1 page  
Application Notes (Continued)
may be used provided the output level does not exceed
1 Vrms, VCC=12V (0.7 Vrms, VCC=9V). At reduced gain
(<−6 dB)the input stage will overload if the input level ex-
ceeds 1.6 Vrms, VCC=12V (1.1 Vrms, VCC=9V). As there is
Application Circuit
volume control on the input stages, the inputs may be oper-
ated with a lower overload margin than would otherwise be
acceptable, allowing a possible improvement in signal to
noise ratio.
Applications Information
OBTAINING MODIFIED RESPONSE CURVES
The LM4610 is a dual DC controlled bass, treble, balance
and volume integrated circuit ideal for stereo audio systems.
In the various applications where the LM4610 can be used,
there may be requirements for responses different to those
of the standard application circuit given in the data sheet.
This application section details some of the simple variations
possible on the standard responses, to assist the choice of
optimum characteristics for particular applications.
TONE CONTROLS
Summarizing the relationship given in the data sheet, basi-
cally for an increase in the treble control range Ct must be in-
creased, and for increased bass range Cb must be reduced.
Figure 1 shows the typical tone response obtained in the
standard application circuit. (Ct=0.01 µF, Cb=0.39 µF). Re-
sponse curves are given for various amounts of boost and
cut.
DS101125-35
DS101125-4
FIGURE 1. Tone Characteristic (Gain vs Frequency)
Figure 2 and Figure 3 show the effect of changing the re-
sponse defining capacitors Ct and Cb to 2Ct, Cb/2 and 4Ct,
Cb/4 respectively, giving increased tone control ranges. The
values of the bypass capacitors may become significant and
affect the lower frequencies in the bass response curves.
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
Molded Dual-In-Line Package (N)
Order Number LM4610N
NS Package Number N20A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: [email protected]
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LM4610N.PDF ] | |
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