Texas Instruments AN-1622 LM49100 Скачать руководство пользователя страница 20

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.

TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.

TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.

Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.

Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.

In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.

No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.

Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.

TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.

Products

Applications

Audio

www.ti.com/audio

Automotive and Transportation

www.ti.com/automotive

Amplifiers

amplifier.ti.com

Communications and Telecom

www.ti.com/communications

Data Converters

dataconverter.ti.com

Computers and Peripherals

www.ti.com/computers

DLP® Products

www.dlp.com

Consumer Electronics

www.ti.com/consumer-apps

DSP

dsp.ti.com

Energy and Lighting

www.ti.com/energy

Clocks and Timers

www.ti.com/clocks

Industrial

www.ti.com/industrial

Interface

interface.ti.com

Medical

www.ti.com/medical

Logic

logic.ti.com

Security

www.ti.com/security

Power Mgmt

power.ti.com

Space, Avionics and Defense

www.ti.com/space-avionics-defense

Microcontrollers

microcontroller.ti.com

Video and Imaging

www.ti.com/video

RFID

www.ti-rfid.com

OMAP Applications Processors

www.ti.com/omap

TI E2E Community

e2e.ti.com

Wireless Connectivity

www.ti.com/wirelessconnectivity

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2013, Texas Instruments Incorporated

Содержание AN-1622 LM49100

Страница 1: ...pin and HPR pin carries the output signals from the two amplifiers and each of the other pins connecting to ground making this configuration single ended connections 6 Differential mono amplifier outp...

Страница 2: ...th a mono input signal The LM49100 features a 32 step digital volume control and ten distinct output modes The mixer volume control and device mode select are controlled through an I2 C compatible int...

Страница 3: ...d is an I2 C signal generation board and software With this board and the software the user can easily control the LM49100 s shutdown function mute and stereo volume control Figure 2 shows the softwar...

Страница 4: ...ation board VDDHP GND Headphone power supply for the headphone amplifier which creates split supplies for the positive voltage is converted by switch capacitor creating a negative voltage of equal mag...

Страница 5: ...udes controls for the amplifier s volume control individual channel shutdown and the mute function The control program s on screen user interface is shown in Figure 2 The Default button is used to ret...

Страница 6: ...r 0 1 F 0805 HPL 2 pin header 100 mil pitch 1x2 Header HPR 2 pin header 100 mil pitch 1x2 Header I2C 6 pin 6 pin header 100 mil pitch 2x3 Header Header Left Input 2 pin header 100 mil pitch 1x2 Header...

Страница 7: ...ration Board PCB Layout Figure 4 Top Overlay Figure 5 Top Layer 7 SNAA043A October 2007 Revised May 2013 AN 1622 LM49100 Evaluation Board Submit Documentation Feedback Copyright 2007 2013 Texas Instru...

Страница 8: ...yout www ti com Figure 6 Upper Inner Layer Figure 7 Lower Middle Layer 8 AN 1622 LM49100 Evaluation Board SNAA043A October 2007 Revised May 2013 Submit Documentation Feedback Copyright 2007 2013 Texas...

Страница 9: ...ion Board PCB Layout Figure 8 Bottom Layer Figure 9 Bottom Overlay 9 SNAA043A October 2007 Revised May 2013 AN 1622 LM49100 Evaluation Board Submit Documentation Feedback Copyright 2007 2013 Texas Ins...

Страница 10: ...5 respectively Typical THD N versus Output Power performance curves at VDD 3V 3 6V and 5V for 32 and 8 are shown in Figure 16 and Figure 17 respectively Figure 10 THD N vs Frequency Figure 11 THD N vs...

Страница 11: ...ti com Typical Demonstration Board Audio Performance Figure 16 THD N vs Output Power Figure 17 THD N vs Output Power RL 32 f 1kHz RL 8 f 1kHz BW 22kHz HP Mode 4 BW 22kHz LS Mode 1 11 SNAA043A October...

Страница 12: ...ed for extra headphone output attenuation Table 4 Output Mode Selection 1 Output Mode MC3 MC2 MC1 MC0 Handsfree Mono Output Right HP Output Left HP Output Number 0 0 0 0 0 SD SD SD 1 0 0 0 1 2 GM M SD...

Страница 13: ...0 1 0 13 5 19 5 12 0 1 0 1 1 12 18 13 0 1 1 0 0 10 5 16 5 14 0 1 1 0 1 9 15 15 0 1 1 1 0 7 5 13 5 16 0 1 1 1 1 6 12 17 1 0 0 0 0 4 5 10 5 18 1 0 0 0 1 3 9 19 1 0 0 1 0 1 5 7 5 20 1 0 0 1 1 0 6 21 1 0...

Страница 14: ...olling microcontroller and the slave is the LM49100 The I2 C address for the LM49100 is determined using the ADDR pin The LM49100 s two possible I2 C chip addresses are of the form 111110X10 binary wh...

Страница 15: ...I2 C Bus Format Figure 20 I2 C Timing Diagram 15 5 I2 C Interface Power Supply Pin VDDI2 C The LM49100 s I2 C interface is powered up through theVDD I2 C pin The LM49100 s I2 C interface operates at...

Страница 16: ...he single ended configuration its differential output doubles the voltage swing across the load Theoretically this produces four times the output power when compared to a single ended amplifier under...

Страница 17: ...emperature If these measures are insufficient a heat sink can be added to reduce JA The heat sink can be created using additional copper area around the package with connections to the ground pin s su...

Страница 18: ...ess shutdown function As discussed above choosing CIN no larger than necessary for the desired bandwidth helps minimize clicks and pops CB s value should be in the range of 4 to 5 times the value of C...

Страница 19: ...y 18 Revision History Rev Date Description 1 0 10 1907 Initial release 19 SNAA043A October 2007 Revised May 2013 AN 1622 LM49100 Evaluation Board Submit Documentation Feedback Copyright 2007 2013 Texa...

Страница 20: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

Отзывы: