BA6800AF ROHM Electronics, BA6800AF Datasheet

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BA6800AF

Manufacturer Part Number
BA6800AF
Description
Fluorescent Display Tube Level Meter Driver, 16-point X 2 Channel, vu Scale, Bar Display
Manufacturer
ROHM Electronics
Datasheet
The BA6800AF is a two-channel, 16-point fluorescent display tube driver for VU-scale bar-level meters.
It uses a dynamic-drive system and is provided with 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 com-
ponents are required.
FApplications
Level meters for all types of AV equipment
FFeatures
1) Uses dynamic-drive system to display two 16-point
2) AC and DC inputs provided. Switching function al-
3) Upper 12 points have peak hold function in AC mode
804
Fluorescent display tube level meter
driver, 16-point
bar display
BA6800AF
Audio ICs
channels. 28-pin SOP package.
lows two-mode display.
(two seconds).
2 channel, VU scale,
4) Power-on mute function.
5) Dynamic-drive system reduces the power dissipa-
6) Square root compression amplifier built in.
tion of the fluorescent display tube power supply.

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BA6800AF Summary of contents

Page 1

... BA6800AF The BA6800AF is a two-channel, 16-point fluorescent display tube driver for VU-scale bar-level meters. It uses a dynamic-drive system and is provided with 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 com- ponents are required ...

Page 2

... Audio ICs FBlock diagram FAbsolute maximum ratings (Ta = 25_C) FElectrical characteristics (unless otherwise noted 25_C) BA6800AF 805 ...

Page 3

... Audio ICs FElectrical characteristics (unless otherwise noted 25_C) 806 BA6800AF ...

Page 4

... Audio ICs FMeasurement circuit FApplication example BA6800AF 807 ...

Page 5

... Peak hold circuit The BA6800AF have peak hold circuits that temporarily holds peak signal levels in AC input mode. The peak hold function can be used with the upper 12 points (5 to 16). The peak hold time depends on the oscil- lator frequency ...

Page 6

... The external resistor R26 connected to the oscilla- tor (pin 28) should be in the range of 20k and 100k . outside this range, oscillation may stop due to the ). influence of temperature (see Fig. 7). Gleak and and that BA6800AF and VR (connected 1 2 809 ...

Page 7

... Audio ICs FElectrical characteristics curves FExternal dimensions (Units: mm) 810 BA6800AF ...

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