BA6820F

Audio ICs LED level meter driver, 12-point channel, VU scale, bar display BA6820F / BA6822S / BA6822F 2 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 3kΩ (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 packages. 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 applied externally. 5) Power on mute function. 662 Audio ICs FBlock diagram BA6820F / BA6822S / BA6822F FAbsolute maximum ratings (BA6820F / BA6822F) (Ta = 25_C) (BA6822S) (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 663 Audio ICs BA6820F / BA6822S / BA6822F FElect...