TSH103 Power supply considerations
Doc ID 13895 Rev 2 5/12
4 Power supply considerations
Correct power supply bypassing is very important for optimizing performance in high-
frequency ranges. The bypass capacitors should be placed as close as possible to the IC
pins to improve high-frequency bypassing. A capacitor of 100 µF is necessary to minimize
the power supply noise in low frequencies. For better quality bypassing, we recommend
adding a CMS 100 nF capacitor, also placed as close as possible to the IC pins.
Figure 7. Circuit for power supply bypassing
Figure 8. Noise supply rejection
+V
CC
CLF = 100 µF
+
CHF = 100 nF
5
TSH103
IN1
IN2
IN3
OUT1
OUT2
OUT3
4
AM04552
100k 1M 10M
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Vcc=+5Vdc+0.2Vac
Load=150
Ω
C
LF
=100uF
C
HF
=100nF
Noise supply rejection (dB)
Frequency (Hz)