TSH346 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TSH346' PDF : 18 Pages View PDF
Power supply considerations and improvement of the PSRR
TSH346
3
Power supply considerations and improvement of the
PSRR
Correct power supply bypassing is very important to optimize performance in low and high-
frequency ranges. Bypass capacitors should be placed as close as possible to the IC pin
(pin 4) to improve high-frequency bypassing. A capacitor (CLF) greater than 10 µF is
necessary to improve the PSRR in low frequencies. For better quality bypassing, a capacitor
of 100 nF (CHF) can be added. CHF must be placed as close as possible to the IC pin, to
improve the noise supply rejection in the higher frequency ranges. A coil can be added in
order to better reject the noise from the supply and to prevent current peaks as much as
possible.
Figure 21. Circuit for power supply bypassing
+VCC
Coil
CLF
+
CHF
4
R
G
TSH346
B
5
AM00824
8/18
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