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2009.08 - Rev.A
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Audio Accessory IC Series
Ground Isolation
Amplifier
BA3121F, BA3123F
●Description
The BA3121F/BA3123F are ground isolation amplifiers developed for use in car audio applications.
This IC efficiently eliminate problems caused by wiring resistance, and remove noise generated by the electrical devices
used in automobiles. The capacitance values of the external capacitors required for the ICs are small to allow compact
and reliable set design.
●Features
1) Large capacitors not required
2) High common-mode rejection ratio (57dB typ. at f = 1kHz).
3) Low noise (VNO = 3.5μVrms Typ.).
4) Low distortion (THD = 0.002% Typ.).
5) Two channels.
●Applications
Car audio systems
●Line up matrix
BA3121F BA3123F
Operation temperature
－30～＋85C －40～＋85C
●Absolute maximum ratings (Ta = 25C)
Parameter Symbol Limits Unit
Power supply voltage Vcc 18 V
Power dissipation Pd 450* mW
Operation
temperature
BA3121F
Topr
－30～＋85 ℃
BA3123F －40～＋85 ℃
Storage temperature Tstg －55～＋125 ℃
＊Reduced by 4.5mW in Ta of 1C over 25C.
●Recommended operating conditions (Ta = 25C)
Parameter Symbol Min. Typ. Max. Unit
Power supply voltage Vcc 4 12 18 V
No.09092EAT01
