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U4249B, U425, U4250BM-R

Table of contents:
Info of U4249B
Info of U425
Info of U4250BM-R

U4249B, U425, U4250BM-R Selling Leads, Datasheet

MFG:TFK Package Cooled:SOP D/C:09+

U4249B, U425, U4250BM-R Datasheet download

Five Points

Part Number: U4249B

MFG: TFK

Package Cooled: SOP

D/C: 09+

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U425 General Description

The Calogic U421 Series are Dual N-Channel JFETs on a monolithic structure designed specifically for very high input impedance for differential amplification and impedance matching. This series features ultra low input bias current (250 fempto amps, U421) while offering high gain at low operating currents and tight matching characteristics. These devices are available in chip form for hybrid designs as well as a hermetic TO-78 package.

U425 Maximum Ratings

Gate-to-Gate Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . ±40V
Gate-Drain or Gate-Source Voltage . . . . . . . . . . . . . . . . . . -40V
Gate Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Device Dissipation (Each Side), T_A = 25
(Derate 3.2 mW/ oC to 150oC) . . . . . . . . . . . . . . 400mW
Total Device Dissipation, T_A = 25
(Derate 6.0 mW/ to 150) . . . . . . . . . . . . . 750 mW
Storage Temperature Range . . . . . . . . . . . . . -65 to +150

U425 Features

· Ultra Low Input Bias Current . . . . . . . 250 Fempto Amps
· Low Operating Current
· Tight Matching Characteristics

U425 Typical Application

· Ultra Low Leakage FET Input Op Amps
· Electrometer
· Infrared Detectors
· pH Meters

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