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| Audio ICs General-purpose dual line amplifier BA3118L The BA3118L is a dual-channel line amplifier with a flat frequency characteristic. It has been designed for use in radio cassette players and car stereos. The feedback resistors are all on the chip, which reduces the number of external components required and simplifies PCB design. The gain can be set to one of 10 gain settings from 6dB to 20dB (6dB, 8dB, 10dB, 10.9dB, 12.4dB, 13.4dB, 15.1dB, 16dB, 17.9dB and 20dB), and external fine trimming is possible. FApplications Car stereos and radio cassette players FFeatures 1) 10 gain settings over the range 6dB to 20dB (max. step 2dB) without external resistors. 2) Low distortion. 3) Good crosstalk characteristics. 4) Low noise. 5) Flat frequency characteristic. 6) Two channels on one chip allows compact set design. 7) Pin 9 is not connected which simplifies the PBC GND design. 8) Built-in feedback resistors reduces the number of external components required. 9) Low gain variance between the two channels. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 184 Audio ICs FBlock diagram BA3118L FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8.0V, f = 1kHz and GVC = 20dB) 185 Audio ICs FMeasurement circuit BA3118L Measurement circuit switch setting table FGain setting pattern diagrams 186 Audio ICs FApplication example BA3118L 187 Audio ICs FElectrical characteristics curves BA3118L FExternal dimensions (Units: mm) 188 |
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