THS4521 Datasheet, PDF (42/65 Pages) Texas Instruments – VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT, FULLY DIFFERENTIAL AMPLIFIER

THS4521, THS4522, THS4524
SBOS458H – DECEMBER 2008 – REVISED JUNE 2015
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Typical Applications (continued)
The test circuit shown in Figure 79 has a gain = 0.27 and attenuates the input signal. For applications that
require higher gain, the circuit was modified to gains of G = 1, G = 2, and G = 5 by replacing the feedback
resistors (R33 and R34) and re-tested to show performance.
R33
270 W
C21
1 nF
+5 V _C29
+15 V10 _mF
Audio
Inputs
R23
1 kW
C41
0.01 mF
R41
40.2 W
THS4521
R24
1 kW
GND
+15 V
C83
0.1 mF
C42
0.01 mF
R42
40.2 W
R27
1 kW
TP4
GND
C73
100 pF
R13
0W
C79
2.7 nF
PCM4204
Inputs
R14
0W
C74
100 pF
C30
10 mF
C22
1 nF
R34
270 W
Figure 79. THS4521 and PCM4204 Test Circuit
42
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