ba3121f ROHM Co. Ltd., ba3121f Datasheet
ba3121f
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ba3121f Summary of contents
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... BA3121F Description The BA3121F are ground isolation amplifiers developed for use in car audio applications. This IC efficiently eliminates problems caused by wiring resistance, and removes noise generated by the electrical devices used in automobiles. The capacitance values of the external capacitors required for the ICs are small, in order to allow compact and reliable set design ...
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Electrical characteristics (unless otherwise noted 25°C, VCC = 12V 1kHz 1.8kΩ) Parameter Quiescent current Output noise voltage Voltage gain Maximum output voltage Total harmonic distortion Common-mode rejection ratio Common-made voltage Ripple rejection ratio Channel ...
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Fig.7 Ripple rejection ratio vs. frequency Fig.10 Common-mode rejection ratio vs. frequency Fig.8 Total harmonic distortion vs. output voltage Fig.11Common-mode rejection ration vs. input voltage 3/8 Fig.9 Total harmonic distortion vs. frequency ...
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Measurement circuits Fig.12 4/8 ...
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Block diaglam Fig.13 5/8 ...
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... However, due to mismatching between the resistors, difference in the noise voltages (e tolerances in the operational amplifier, a noise voltage exists. Fig.14 Flow of noise in car audio systems With the BA3121F, the elimination level of the noise is expressed as: CMMR = 20log (e Therefore, CMRR ≧ 41dB can be guaranteed. , the noise voltage will ...
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Applications Cautions on use (1) Numbers and data in entries Numbers and data in entries are representative design values and are not guaranteed values of the items. (2) Example application circuit Although ROHM is confident that the example application circuit ...
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... Order model name selection Product Name BA3121F SOP8 <Dimension> 5.0±0 0.15±0.1 0.1 1.27 0.4±0.1 The contents described herein are correct as of October, 2005 The contents described herein are subject to change without notice. For updates of the latest information, please contact and confirm with ROHM CO.,LTD. ...
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Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...