L8401

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

5 of 5

www.unisonic.com.tw

QW-R123-018.B



APPLICATIONS INFORMATION

It is application circuit of UTC L8401 in figure 2, the bias circuits is stable fully in -40°C ~80°C.

other external circuits, but it is low load current is noticeable.

C1 and C2 are used to suppress noise or RF interference in each stage of the IC or other external circuits in

application circiut system. Value of C1 and C2 could be used in 1nF to 100nF as design dependent.

half normal value.

There are full protection for external FETs on chip: The gate output voltage is limitted in -2.5V~0.7V in any

conditions including powerup and powerdown transients; If the negative bias generator be shorted or overloaded, the

drain supply to FETs is shut down to avoid damage to the FETs by excessive drain current.

The fig.3 is typical applications of UTC L8401 in LNB.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.