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THS4524MDBTREP Datasheet(PDF) 32 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # THS4524MDBTREP
Description  VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT,FULLY DIFFERENTIAL AMPLIFIER
PDF  48 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

THS4524MDBTREP Datasheet(HTML) 32 Page - National Semiconductor (TI)

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0
50
100
150
200
Time (ms)
Power
Supply
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Outputs
POWER-SUPPLY TURN-OFF POP PERFORMANCE
0
50
100
150
200
Time (ms)
PD
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Outputs
PD DISABLE POP PERFORMANCE
0
50
100
150
200
Time (ms)
Power
Supply
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Outputs
POWER-SUPPLY TURN-ON POP PERFORMANCE
0
50
100
150
200
Time (ms)
PD
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
Outputs
PD ENABLE POP PERFORMANCE
THS4524-EP
SBOS609A – JUNE 2012 – REVISED AUGUST 2013
www.ti.com
Audio On/Off Pop Performance
space
The THS4524 was tested to show on and off pop
With no tone input, Figure 75 shows the pop
performance by connecting a speaker between the
performance
using
the
PD
pin
to
enable
the
differential outputs and switching the power supply on
THS4524, and Figure 76 shows performance using
and off, and also by using the PD function of the
the PD pin to disable the device. Again, the transients
THS4524. Testing was done with and without tones.
during power on and off show that no audible pop
During these tests, no audible pop could be heard.
should be heard. It should also be noted that the turn
on/off times are faster using the PD pin technique.
With no tone input, Figure 73 shows the pop
performance
when
switching
power
on
to
the
THS4524
and
Figure
74
shows
the
device
performance
when
turning
the
power
off.
The
transients during power on and off illustrate that no
audible pop should be heard
Figure 75. THS4524 PD Pin Enable Pop
Performance
Figure 73. THS4524 Power-Supply Turn-On Pop
Performance
Figure 76. THS4524 PD Pin Disable Pop
Performance
The power on/off pop performance of the THS4524,
whether by switching the power supply or when using
Figure 74. THS4524 Power-Supply Turn-Off Pop
the power-down function built into the chip, shows
Performance
that no special design should be required to prevent
an audible pop.
space
32
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links :THS4524-EP



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