ROHM BA6800AS Datasheet

Audio ICs

Fluorescent display tube level meter
driver, 16-point  2 channel, VU scale,
bar display

BA6800AS

The BA6800AS is a two-channel, 16-point fluorescent display tube driver for VU-scale bar-level meters. It uses a dynam­ic-drive system and has both AC and DC inputs. The AC input mode has a peak hold circuit. The IC features a power-on
mute, and the output block can directly drive fluorescent display tubes, so few external components are required. The
grid output duty cycle is 1 / 8.

Applications
Level meters for all types of AV equipment

Features

1) Uses dynamic-drive system to display two 16-point
channels. 30-pin SDIP package.

2) AC and DC inputs provided. Switching function al­lows two-mode display .

3) Upper 12 points have peak hold function in AC mode
(two seconds).

4) Power-on mute function.

5) Dynamic-drive system reduces the power dissipa­tion of the fluorescent display tube power supply.

6) Square root compression amplifier built in.

Absolute maximum ratings (Ta = 25C)

797

Audio ICs BA6800AS

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

Block diagram

798

Audio ICs BA6800AS

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

799