THS4532 Datasheet, PDF (34/44 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

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.
5
2.5
4
2
V_S = 5 V
3
G = 2 V/V ^1.5
R_F = 2 kΩ
R_L = 200 Ω
2
1
1
Power Supply 0.5
V_OUT +
V_OUT −
0
0
0
50m
100m
150m
200m
Time (s)
G072
Figure 87. Power Supply Turn On Pop Performance
5
2.5
Power Supply
V_OUT +
4
V_OUT −
2
V_S = 5 V
3
G = 2 V/V ^1.5
R_F = 2 kΩ
R_L = 200 Ω
2
1
1
0.5
0
0
0
50m
100m
150m
200m
Time (s)
G073
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.
34
Submit Documentation Feedback
Product Folder Links :THS4532
Copyright © 2013, Texas Instruments Incorporated