New product applications: FET-IC op amp family offers subpicoampere input bias currents

For very low input bias current (subpicoampere region) without excessive offset voltage, voltage drift, or noise, designers have had to settle for more expensive and larger modular op amps 0.003 pA p-p current noise from 0.1 Hz to 10 Hz. The low offset voltage of the 3523 series family enables the devices to be used without offset nulling. This feature is an advantage when the amplifier is to be located near the signal source.