N-Channel JFET Pairs
~Siliconix
.LII incorporated
U421 SERIES
N-Channel JFET Pairs
The U421 Series are monolithic pairs of n-channel JFETs ...
Description
~Siliconix
.LII incorporated
U421 SERIES
N-Channel JFET Pairs
The U421 Series are monolithic pairs of n-channel JFETs designed to provide very high input impedance for differential amplification and impedance matching. Among its many unique features, this series offers operating gate current specified at -250 fA (U421-3), high gain at low operating currents, and tight matching (10 mV for U421 and U424). Additionally, its TO-78 package is hermetically sealed and may be screened per MIL-S-19500. (See Section 1.)
For additional design information please see performance curves NNT, which are located in Section 7.
SIMILAR PRODUCTS
o Low-Noise, See U401 Series o High-Gain, See 2N5911 Series " Chips, Order U42XCHP
PART NUMBER
U421
U422 U423 U424 U425 U426
V(BR)GSS 9fs IG IVGS1- VGS21
MIN MIN MAX
MAX
(V) (mS) (pA)
(mV)
-40 0.3 -0.25
10
-40 0.3 -0.25 -40 0.3 -0.25
15 25
-40 0.3 -0.5
10
-40 0.3 -0.5 -40 0.3 -0.5
15 25
TO-78
BOTTOM VIEW
1 SOURCE 1 2 DRAIN 1 3 GATE 1 4 CASE 5 SO...
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