662

Audio ICs

LED level meter driver, 12-point

2

channel, VU scale, bar display

BA6820F / BA6822S / BA6822F

The BA6820F, BA6822S and BA6822F are two-channel, 12-point LED drivers for VU-scale bar-level meters.

The ICs are available in 22-pin SOP (BA6820F and BA6822F) and 22-pin shrink-DIP (BA6822S) packages, and use

a dynamic-drive system that can drive two 12-point displays. The ICs have independent AC and DC inputs, and the AC

input mode has a peak hold circuit (with cancel function). The ICs also feature a power-on mute, so steps to prevent

erroneous LED lighting at power on are not required.

The input resistance of the AC inputs is 3k

Ω (Typ.) for the BA6820F and 0.3kΩ (Typ.) for the BA6822S/F.

FApplications

Level meters for VCRs, stereo cassette players, audio

amplifiers and karaoke equipment.

FFeatures

1) Uses dynamic-drive system to display two 12-point

channels. 22-pin SOP and 22-pin shrink DIP pack-

ages.

2) Independent AC and DC inputs provided (one input

displays one channel). Switching function allows

two-mode display.

3) Upper 8 points have peak hold function in AC mode

(two seconds). A peak-hold cancel function is also

provided.

4) A mute function is provided, and muting can be ap-

plied externally.

5) Power on mute function.