OPA1611_15 Datasheet, PDF (18/31 Pages) Texas Instruments – SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifiers

OPA1611, OPA1612
SBOS450C – JULY 2009 – REVISED AUGUST 2014
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8.5 Application Circuit
Figure 35 shows how to use the OPA1611 as an amplifier for professional audio headphones. The circuit shows
the left side stereo channel. An identical circuit is used to drive the right side stereo channel.
820W
2200pF
I_OUTL+
Audio DAC
with Differential
Current
Outputs
+V_A
(+15V)
0.1mF
OPA1611
-V_A
(-15V)
0.1mF
820W
2200pF
+V_A
(+15V)
0.1mF
680W
330W
620W
2700pF
+V_A
(+15V)
0.1mF
8200pF
680W
620W
OPA1611
-V_A
(-15V)
0.1mF
100W
L Ch
Output
I_OUTL-
OPA1611
-V_A
(-15V)
0.1mF
330W
2700pF
Figure 35. Audio DAC Post Filter (I/V Converter and Low-Pass Filter)
18
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