THS4532IPW datasheet(34/44 Pages) NSC

34 / 44 page

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

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

THS4532

SLOS829 – FEBRUARY 2013

www.ti.com

Audio On/Off Pop Performance

The THS4532 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 THS4532.

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

With no input tone, Figure 87 shows the voltage waveforms when switching power on to the THS4532 and

Figure 88 shows voltage waveforms when turning power off. The transients during power on and off show no

audible pop should be heard.

Figure 87. Power Supply Turn On Pop Performance

Figure 88. Power Supply Turn Off Pop Performance

With no input tone, Figure 89 shows the voltage waveforms using the PD pin to enable and disable the

THS4532. The transients during power on and off show no audible pop should be heard.

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