TSH345 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

TSH345

Triple video buffer with selectable filter for HD and SD video applications

STMicroelectronics 

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Electrical characteristics

Figure 27. Circuit for noise rejection improvement measurement

S

R

+5 V

T - bias

Coil

CHF

+

CLF

50 7

TSH345

50 7

AGILENT

4395A

A

TSH345

AM00817

Figure 28 shows how the power supply noise rejection evolves according to the frequency

and depending on how carefully power supply decoupling is achieved.

Figure 28. Power supply noise rejection

0

Vcc=5V(dc)+0.2Vp-p(ac)

-10 Decoupling capacitor: 10µF+100nF

Load=150Ω

-20 Noise rejection=20 log (ΔVCC/ΔVout)

-30

no coil

-40

-50

-60

-70

coil=560µH

-80

10k

100k

1M

10M

Frequency (Hz)

100M

12/23

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