National Semiconductor LME49600 User Manual Download Page 9 | Manualshive

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Revision History

Rev

Date

Description

1.0

02/29/08

Initial release.

9

www.national.com

AN-1768

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Summary of Contents for LME49600

Page 1: ...vailable on the 1 8 stereo headphone jack located in the board s OUTPUT sec tion Use VR1 to control the output signal amplitude Apply power Make measurements Plug in a pair of head phones Enjoy Introduction To help the user investigate and evaluate the LME49600 s performance and capabilities a fully populated demonstration board was created Please contact the National Semiconduc tor Corporation s ...

Page 2: ...in directly to the VEE pin The LME49600 is fully protected through internal current limit and thermal shutdown Operating Conditions Temperature Range 40 C TA 85 C Amplifier Power Supply Voltage 2 5V VS 17V Board Features The LME49600 LME49720 Stereo Headphone Amplifier demonstration board has all of the necessary connections using RCA jacks 1 8 stereo headphone jack and 0 100 headers to apply the ...

Page 3: ...onnect the JU14 pin labeled LT OUT and the pin labeled GND to the positive and ground inputs respectively of an external signal measurement device JU14 s pin labeled LT OUT corresponds to the headphone jack s tip connection J5 s pin labeled GND corresponds to the headphone jack s sleeve or ground connection HPJ2 Stereo 1 8 headphone jack Used for stereo signal output Left channel output is on the ...

Page 4: ...22 CERAMIC CAPACITOR 0 1μF 10 25V 603 TDK C1608X7R1E104K HPJ1 HPJ2 1 8 Stereo Headphone Jack J1 J2 RCA jack JU1 JU4 JU6 JU14 JU15 JU17 100mil pin pitch two pin JU19 100mil pin pitch three pin R1 R6 1 4W resistor 1kΩ 1 1 4W 1 4W Axial YAGEO MFR 25FBF 1K00 R9 R12 1 4W resistor 1MΩ 1 1 4W 1 4W Axial YAGEO MFR 25FBF 1M00 S1 SWITCH SLIDE DPDT Not Installed DPDT U1 U2 LME49720NA Can also use LM4562 LME4...

Page 5: ...ed to create the LME49600 demonstration board Figure 3 is the silkscreen that shows parts location Figure 4 is the top layer Figure 5 is the bottom layer Figure 6 is the bottom silkscreen layer 30047316 Figure 3 Top Silkscreen 30047315 Figure 4 Top Layer 5 www national com AN 1768 ...

Page 6: ...30047313 Figure 5 Bottom Layer 30047314 Figure 6 Bottom Silk Layer www national com 6 AN 1768 ...

Page 7: ...hone amplifier into from top to bottom at 10mW 16Ω 32Ω 64Ω 300Ω VS 15V f 100Hz 22Hz BW 22kHz 30047366 FIGURE 10 THD N vs Output Power LME49720 LME49600 headphone amplifier into from top to bottom at 0 1mW 16Ω 32Ω 64Ω 300Ω VS 3V f 1kHz 400Hz BW 22kHz 30047367 FIGURE 11 THD N vs Output Power LME49720 LME49600 headphone amplifier into from top to bottom at 10mW 16Ω 32Ω 64Ω 300Ω VS 9V f 1kHz 400Hz BW ...

Page 8: ...16Ω 32Ω 64Ω 300Ω VS 15V f 10kHz 400Hz BW 80kHz 30047369 FIGURE 16 THD N vs Frequency LME49720 LME49600 headphone amplifier into from top to bottom at 5kHz 16Ω at 3mW 32Ω at 3mW 300Ω at 0 3mW and 64Ω at 1 5mW VS 3V 10Hz BW 80kHz 30047370 FIGURE 17 THD N vs Frequency LME49720 LME49600 headphone amplifier into from top to bottom at 5kHz 16Ω at 100mW 32Ω at 100mW 64Ω at 35mW and 300Ω at 8mW VS 9V 10Hz...

Page 9: ...Revision History Rev Date Description 1 0 02 29 08 Initial release 9 www national com AN 1768 ...

Page 10: ...SIBLE FOR THEIR PRODUCTS AND APPLICATIONS USING NATIONAL COMPONENTS PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE NATIONAL COMPONENTS BUYERS SHOULD PROVIDE ADEQUATE DESIGN TESTING AND OPERATING SAFEGUARDS EXCEPT AS PROVIDED IN NATIONAL S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS NATIONAL ASSUMES NO LIABILITY WHATSOEVER AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING...

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