The NJM4556 Opamp.

Updated: 7Jan 2001

CONTENTS.

.

INTRODUCTION.
Bipolar opamp designed to drive lower impedance loads than most opamps are capable of. Linearity for these loads is however not impressive.

SPECS.
Here are the vital statistics: All typical values, for +/-15V supply rails.
Supply voltage +/-18V abs max
Output range +/-11V typ (** load)
CM range +/-14V
en 8 nV/rtHz typ 1 kHz
in Not in spec
Ibias 50 nA typ
Slew rate: 3 V/us
Supply current 8 mA total
Unity gain stable YES
Cost 49p RS Jan 2001

The maximum slew rate is modest, but adequate.
Fig 11

Distortion versus loading for the NJM4556A opamp.
The rise at low freqs is unusual, and may be due to thermal feedback from the output stage to the input devices.

(njm4556s.gif)