BA3812L Datasheet | ROHM

features low distortion, low noise, and wide dynamic range, and is an ideal choice for Hi-Fi stereo applications. It also has a wide operating voltage range (3.5V to 16V), which means that it can be adapted for use with most types of stereo equipment. The five center frequencies are independently set using external capacitors, and as the output stage buffer amplifier and tone control section are independent circuits, fine control over a part of the frequency bandwidth is possible, By using two BA3812Ls, it is possible to construct a 10-point graphic equalizer. The amount of boost and cut can be set by external ponents. FApplications Radio cassette players, home stereo systems and car stereo systems. FFeatures 1) Minimizes the number of ponents required to build a graphic equalizer. 2) Low distortion and low noise. 3) Wide operating power supply voltage range (3.5V to 16V). FAbsolute maximum ratings (Ta = 25_C) 4) Low current dissipation (5 m A). 5) Wide dynamic range (VOM = 2.1Vrms / VCC = 8V). 6) Built-in input and output buffer amplifiers. FRemended operating conditions (Ta = 25_C) Audio ICs FBlock diagram FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, and fin = 1k Hz) Audio ICs FMeasurement circuit FApplication example Audio ICs By using more than one IC the following applications are also possible: (1) 10-point single-channel graphic equalizer As shown in Fig. 2, with two ICs it is possible to construct a 10-point single-channel graphic equalizer, (2) 7-point stereo graphic equalizer As shown in Fig. 3, with three ICs it is possible to construct a 7-point stereo graphic equalizer. Two BA3812L ICs are used to construct a 5-point stereo graphic equalizer, and two of the active inductor circuits from a third BA3812L are added to each. Audio ICs FSolid-state inductor A solid state inductor uses an active element and has the equivalent function of an inductor. The circuit shown in Fig....