Ground Isolation Amplifier - BA3123F

This IC is 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.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BA3123F-E2 Active SOP8 2500 2500 Taping Yes
Vcc(Min.)[V] 4.0
Vcc(Max.)[V] 18.0
Iq[mA] 9.0
I/F Stand alone
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・Large capacitors not required
    ・High common-mode rejection ratio (57dB typ. at f = 1kHz)
    ・Low noise (VNO = 3.5μVrms Typ.)
    ・Low distortion (THD = 0.002% Typ.)
    ・Two channels
Pin Configuration:
Pin Configration
Other New/Updated Products Relating to Audio & Video
PART NUMBER Product Name Package Datasheet Distribution Inventory
BA3121F Ground Isolation Amplifier SOP8   Buy Sample
New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.