Audio ICs
LED level meter driver, 12-point,
power scale, dot or bar display
BA683A
The BA683A is a monolithic IC for LED power meter applications. The display level range is 9mV
rms
to 380mV
rms
(Typ.)
divided into 12 points with interval spacings of 3dB. The constant current outputs can be set using an external resistor.
FApplications
Level meters for all types of audio equipment applica-
tions
FFeatures
1) 12-point power meter driver for bar / dot displays.
2) Fixed-current outputs that can directly drive LEDs.
3) Output current can be set using external resistors al-
lowing different types of LEDs to be used in combina-
tion.
FBlock
diagram
4) Built-in half-wave rectifier amplifier.
5) With bar-type display, by connecting four LEDs in se-
ries, power dissipation is reduced.
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