LM3915N-1 mikroschema (3db VU meter)

LM3915 Features

3 dB/step, 30 dB range

Drives LEDs, LCDs, or vacuum fluorescents

Bar or dot display mode externally selectable by the user

Expandable to displays of 90 dB

Internal voltage reference from 1.2V to 12V

Operates with a single supply of 3V to 25V

Inputs operate down to the ground

Output current programmable from 1 mA to 30 mA

Input withstands ±35V without damage or false outputs

Outputs are current regulated, open collectors

Directly drives TTL or CMOS

The internal 10-step divider is floating and can be referenced to a wide range of voltages