BA3834F-E2

Overview

The BA3834F-E2 is a silicon monolithic integrated circuit designed as a seven-band band-pass filter for car audio spectrum analyzers. It operates within a power supply voltage range of 4.5 V to 6.5 V, with a typical operating voltage of 5.0 V. The device features serial logic inputs (SEL, A, B, C) to select one of seven center frequencies: 68 Hz, 170 Hz, 420 Hz, 1 kHz, 2.4 kHz, 5.9 kHz, and 14.4 kHz. Standard output levels are typically 1.35 V at each selected frequency. The component utilizes an SOP-18 package and requires minimal external parts.

Feature Summary

• Built-in seven-band band-pass filter optimized for car audio spectrum analyzer applications
• Designed for direct interface with 5V microcomputer buses via serial control logic
• SOP-18 package configuration requiring few external components

Applications

• Car audio systems
• Mini audio stereo systems
• CD radio cassette players

Procurement Notes

Verify the current lifecycle status before integration, as this component may be subject to obsolescence or discontinuation by the manufacturer. Confirm RoHS compliance details through official datasheets. Ensure that sourcing channels provide genuine ROHM Semiconductor products to avoid counterfeit risks in automotive electronics.

Selection Notes

Select this component when a dedicated seven-band active filter is required for visual equalizer displays in automotive audio units. The design supports 5V logic interfaces, simplifying connection to microcontrollers. Verify that the load impedance connected to the AOUT pin is sufficiently high to prevent output level degradation due to the internal V/I conversion structure.

Part Context

This part belongs to the BA3834F series from ROHM Semiconductor, specifically engineered for audio signal processing in vehicle entertainment systems. It integrates multiple band-pass filters into a single chip to reduce board space and component count compared to discrete solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult ROHM sales representatives for alternative recommendations if this specific model is discontinued.