U421 Datasheet, PDF (1/2 Pages) Calogic, LLC – N-Channel Dual JFET

N-Channel Dual JFET
CORPORATION
U421 – U426
FEATURES
Ultra Low Input Bias Current . . . . . . . 250 Fempto Amps
• _{Low Operating Current}
•• _{Tight Matching Characteristics}
APPLICATIONS
Ultra Low Leakage FET Input Op Amps
• _Electrometer
• _{Infrared Detectors}
•• _{pH Meters}
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.
ORDERING INFORMATION
Part
Package
Temperature Range
U421-U426 TO-78 Hermetic Package -55^oC to +150^oC
XU421-U426 Sorted Chips in Carriers -55^oC to +150^oC
PIN CONFIGURATION
TO-78
CJ4
C
S2 ^D2
G1
G2
D1 ^S1
1 SOURCE 1
2 DRAIN 1
3 GATE 1
4 CASE/BODY
5 SOURCE 2
6 DRAIN 2
7 GATE 2
4
3
5
6
217
BOTTOM VIEW