LM3914

The LM3914 is an integrated circuit (IC), designed by National Semiconductor in the late 1970s, used to operate displays that visually show the magnitude of an analog signal.

In the basic configuration it provides a ten step scale which is expandable to over 100 segments with other LM3914 ICs in series.

All the devices in this group operate with a range of voltages from 3-25 V, can drive LED and VFD displays.

[4] They can provide a regulated output current between 2-30 mA to directly drive displays.

Internally, each device contains ten comparators and a resistor scaling network, as well as a 1.25 volt reference source.