797

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 dynam-

ic-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.

FApplications

Level meters for all types of AV equipment

FFeatures

1) Uses dynamic-drive system to display two 16-point

channels. 30-pin SDIP package.

2) AC and DC inputs provided. Switching function al-

lows 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 dissipa-

tion of the fluorescent display tube power supply.

6) Square root compression amplifier built in.

FAbsolute maximum ratings (Ta = 25_C)