THS4521 datasheet(37/54 Pages) TI1

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50m

100m

150m

200m

0.5

1.5

2.5

Time (s)

Power Supply

VOUT +

VOUT −

VS = 5 V

G = 2 V/V

RF = 2 kΩ

RL = 200 Ω

G072

50m

100m

150m

200m

0.5

1.5

2.5

Time (s)

Power Supply

VOUT +

VOUT −

VS = 5 V

G = 2 V/V

RF = 2 kΩ

RL = 200 Ω

G073

THS4531

www.ti.com

SLOS358B – SEPTEMBER 2011 – REVISED MARCH 2012

Audio On/Off Pop Performance

The THS4531 is tested to show on and off pop performance by connecting a speaker between the differential

outputs and switching on and off the power supply, and also by using the power down function of the THS4531.

Testing was done with and without tones. During these tests no audible pop could be heard.

With no input tone, Figure 83 shows the voltage waveforms when switching power on to the THS4531 and

Figure 84 shows voltage waveforms when turning power off. The transients during power on and off show no

audible pop should be heard.

Figure 83. Power Supply Turn On Pop Performance

Figure 84. Power Supply Turn Off Pop Performance

With no input tone, Figure 85 shows the voltage waveforms using the PD pin to enable and disable the

THS4531. The transients during power on and off show no audible pop should be heard.

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THS4521 Datasheet(PDF) 37 Page - Texas Instruments

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