ROHM BA682A Datasheet

Audio ICs

LED level meter driver, 12–point,
VU scale, dot or bar display

BA682A

The BA682A is a monolithic IC for LED level meter applications.
The display level range is 13mV
+8dB.
The constant current outputs can be set using external components allowing use of different color LEDs in various com­binations.

Applications
Level meters for all types of audio equipment applications

Features

1) 12-point VU display meter driver for bar/dot displays.

2) Fixed-current outputs that can directly drive LEDs.

3) Output current can be set using external resistors al­lowing different types of LEDs to be used in combina­tion.

rms to 327mVrms (Typ.), the 0dB level is 130mV rms (Typ.) and the VU display is -20dB to

4) Built-in half-wave rectifier amplifier.

5) LED on and off timing can be set using an external
capacitor and resistor.

6) With bar-type display , by connecting four LEDs in se­ries, power dissipation is reduced.

Absolute maximum ratings (Ta = 25C)

640

Audio ICs BA682A

Block diagram

Electrical characteristics (unless otherwise noted, Ta = 25C and V

CC = 12V)

641