There are three columns of pinout data. The 'Basic pins' column uses a
coding scheme to describe the pins which must be connected for basic
operation. These include the input, output and supply pins for most
opamps. A minority of devices need additional connections, which are
suffixed to the basic scheme as follows:
c? - Compensation pin
g? - Ground pin
z?? - Autozero capacitor pins which require a capacitor
x? - Miscellaneous extra pin
In these cases ? specifies the actual pin number.
The 'Disable pins' column specifies the pin number or numbers of any
disable inputs. The l prefix is for devices with a 'low to disable' pin
and the h prefix is for 'high to disable' pins.
The 'Null pins' column specifies the pin numbers for null pins, which are also known as offset trim pins.