BA3121N

Overview

The BA3121N is a dual-channel ground isolation amplifier developed by Rohm for automotive audio applications. It efficiently eliminates problems caused by wiring resistance and removes noise generated by electrical devices used in automobiles. The device features a high common-mode rejection ratio of 57dB typ. at f = 1kHz, low noise with VNO = 3.5μVrms Typ., and low distortion with THD = 0.002% Typ. Designed to allow compact set design, it requires small external capacitor values.

Feature Summary

• Eliminates noise generated by automobile electrical devices
• High common-mode rejection ratio
• Low noise performance
• Low distortion characteristics

Applications

• Car audio systems

Procurement Notes

Verify the specific package type and suffix against official Rohm documentation before ordering. Confirm that the component meets RoHS standards if required by your manufacturing process. Ensure compatibility with your target operating temperature range and supply voltage conditions.

Selection Notes

Select this component when designing car audio systems requiring effective elimination of wiring resistance issues and electrical noise. Consider its dual-channel architecture and small external capacitor requirements for compact board layouts. Verify that the specified common-mode rejection ratio meets your system's noise immunity needs.

Part Context

The BA3121N belongs to the BA3121 series of ground isolation amplifiers manufactured by Rohm. This series includes variants such as the BA3121 and BA3121F, all designed for use in car audio applications to remove noise from electrical devices.

Replacement Considerations

BA3121F is an alternative part within the same series offering similar ground isolation amplifier functionality.