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THS4521 датащи(PDF) 30 Page - Texas Instruments

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номер детали THS4521
подробное описание детали  VERY LOW POWER,NEGATIVE RAIL INPUT,RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER
PDF  48 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

THS4521 датащи(HTML) 30 Page - Texas Instruments

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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
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 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-OFF POP PERFORMANCE
THS4521
THS4522
THS4524
SBOS458D – DECEMBER 2008 – REVISED AUGUST 2010
www.ti.com
Audio On/Off Pop Performance
With no tone input, Figure 74 shows the pop
performance
using
the
PD
pin
to
enable
the
The THS4521 was tested to show on and off pop
THS4521, and Figure 75 shows performance using
performance by connecting a speaker between the
the PD pin to disable the device. Again, the transients
differential outputs and switching the power supply on
during power on and off show that no audible pop
and off, and also by using the PD function of the
should be heard. It should also be noted that the turn
THS4521. Testing was done with and without tones.
on/off times are faster using the PD pin technique.
During these tests, no audible pop could be heard.
With no tone input, Figure 72 shows the pop
performance
when
switching
power
on
to
the
THS4521
and
Figure
73
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 74. THS4521 PD Pin Enable Pop
Performance
Figure 72. THS4521 Power-Supply Turn-On Pop
Performance
Figure 75. THS4521 PD Pin Disable Pop
Performance
The power on/off pop performance of the THS4521,
whether by switching the power supply or when using
the power-down function built into the chip, shows
that no special design should be required to prevent
Figure 73. THS4521 Power-Supply Turn-Off Pop
an audible pop.
Performance
space
space
30
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Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): THS4521 THS4522 THS4524



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