TSH120 데이터 시트보기 (PDF) - STMicroelectronics

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TSH120

2.2V to 5V video buffer with SAG correction

STMicroelectronics 

TSH120

4

Power supply considerations

Power supply considerations

Correct power supply bypassing is very important for optimizing performance in the high-

frequency range. A bypass capacitor greater than 10μF is necessary to minimize the

distortion. For better quality bypassing at higher frequencies, a capacitor of 10nF must be

added as close as possible to the IC pin of VCC.

Figure 20. Circuit for power supply bypassing

+VCC

CLF=10 F

+

CHF=10nF

TSH120

Figure 21 shows the noise supply rejection improvement with bypass capacitors expressed

by:

20 log (ΔVout / ΔVCC).

Figure 21. Noise supply rejection

0

-10 Vcc=+3.3Vdc+0.2Vac

Load=150Ω

-20

C =10uF

LF

-30

C =100nF

HF

-40

-50

-60

-70

-80

-90

-100

10k

100k

1M

10M

Frequency (Hz)

100M

9/13

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