BA6822S Rohm, BA6822S Datasheet
BA6822S
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BA6822S Summary of contents
Page 1
... 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) ...
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... Audio ICs FBlock diagram FAbsolute maximum ratings (BA6820F / BA6822F) (Ta = 25_C) (BA6822S) (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) BA6820F / BA6822S / BA6822F 663 ...
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... Audio ICs FElectrical characteristics (unless otherwise noted 25_C, V 664 BA6820F / BA6822S / BA6822F = 5.0V and f = 1kHz) CC ...
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... Audio ICs BA6820F / BA6822S / BA6822F 665 ...
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... Audio ICs FMeasurement circuit FApplication example 666 BA6820F / BA6822S / BA6822F ...
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... Pins 1 and 3 have low input impedance recom- mend that you connect potentiometers ( 100k ) in series with the inputs to adjust the bal- ance between ch1 and ch2 and set the levels. BA6820F / BA6822S / BA6822F : 2SA854S Transistors for display switching the values of I LED ...
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... The peak hold function does not operate in DC input mode. (4) Output block The two sets of 12 LEDs for the BA6820F and BA6822S / F are divided into 4 groups of six. A dynamic- drive technique is used to drive the LEDs in order, and display the input level. Group 1 Channel 1 LEDs and 11 ...
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... The LED drive output, display switch output period, peak hold time, and mute time when power is applied are all determined by the oscillation frequency, and are varied when the frequency is changed. and C for channel 1 3 BA6820F / BA6822S / BA6822F and mode, the at connected to pin 9 determine the oscillator fre- 5 and ...
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... Fig. 9). (3) The dynamic ranges for the BA6820F and BA6822S / F comparators are large, and the compara- tors will operate even with low-level signals. For this reason, noise may cause the LEDs to light when they should not, and to prevent this, GND line noise should be kept sufficiently low ...
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... Audio ICs FElectrical characteristic curves FExternal dimensions (Units: mm) BA6820F / BA6822S / BA6822F 671 ...