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,.

U420B

U421

U422

U4221B

U4223B

U4224B

U4226B

U424

U425

U4254BM-M

U426

U427

U4270B

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