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Part: BA6820F
Category:
Interface and Interconnect
Description: Led Level Meter Driver, 12-point X 2 Channel, vu Scale, Bar Display
Company: ROHM Electronics
Datasheet: Download BA6820F datasheet File size : 285 kB
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Datasheet text preview:
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 3k (Typ.) for the BA6820F and 0.3k (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
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5.0V and f = 1kHz)
664
Audio ICs
BA6820F / BA6822S / BA6822F
665
Audio ICs
FMeasurement circuit
BA6820F / BA6822S / BA6822F
FApplication example
666
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