TS615_04 Datasheet, PDF (27/36 Pages) STMicroelectronics – DUAL WIDE BAND OPERATIONAL AMPLIFIER WITH HIGH OUTPUT CURRENT

Power Supply Bypassing
Figure 64 shows a schematic of a 5V single power supply configuration
Figure 64. Circuit for +5V single supply
10µF
IN
Rin
+5V
1kΩ
+5V
+
½ TS615
_
R1
820Ω
Rfb
R2
820Ω
+ 1µF 10nF ^RG
+
CG
910Ω
100µF
OUT
Rs
Rload
TS615
8.2 Channel separation and crosstalk
Figure 65 shows an example of crosstalk from one amplifier to a second amplifier. This phenomenon,
accentuated at high frequencies, is unavoidable and intrinsic to the circuit itself.
Nevertheless, the PCB layout also has an effect on the crosstalk level. Capacitive coupling between
signal wires, distance between critical signal nodes and power supply bypassing are the most significant
factors.
Figure 65. Crosstalk vs. frequency: A_V=+4, R_fb=620Ω, V_CC=±6V, Vout=2Vp
-50
-60
-70
-80
-90
-100
-110
-120
-130
10k
100k
1M
10M
Frequency (Hz)
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