DRV632 Datasheet, PDF (14/23 Pages) Texas Instruments – DirectPath™, 2-VRMS Audio Line Driver With Adjustable Gain

DRV632
SLOS681B – JANUARY 2011 – REVISED AUGUST 2015
10
Active Filter
Gain = 2V/V
RL = 10 kΩ
1
Ch1 1 Vrms
Ch1 2 Vrms
10
Active Filter
Gain = 2V/V
RL = 600 Ω
1
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Ch1 1 Vrms
Ch1 2 Vrms
0.1
0.1
0.01
0.01
0.001
0.001
0.0001
20
100
1k
Frequency (Hz)
10k 20k
Figure 12. Total Harmonic Distortion and Noise vs
Frequency
0
RL = 10 kΩ
VO = 1 Vrms
−20 ^VREF ^{= 1 V}
0.0001
20
100
1k
Frequency (Hz)
10k 20k
Figure 13. Total Harmonic Distortion and Noise vs
Frequency
Left to Right
Right to Left
−40
−60
−80
−100
−120
−140
20
100
1k
Frequency (Hz)
10k 20k
Figure 14. Crosstalk vs Frequency
11 Power Supply Recommendations
The device is designed to operate from an input voltage supply range between 3 V and 3.6 V. This input supply
must be well-regulated. If the input supply is located more than a few inches from the DRV632 device, additional
bulk capacitance may be required in addition to the ceramic bypass capacitors. An electrolytic capacitor with a
value of 47 µF is a typical choice.
Placing a decoupling capacitor close to the DRV632 improves the performance of the line-driver amplifier. An low
equivalent-series-resistance (ESR) ceramic capacitor with a value of 1 µF is a typical choice.
If the DRV632 is used in highly noise-sensitive circuits, TI recommends adding a small LC filter on the VDD
connection.
14
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