BD88400FJ-GE2

Overview

The BD88400FJ-GE2 is a stereo headphone amplifier featuring an integrated charge pump that generates a stable -2.4V negative supply from the positive voltage, enabling ground-referenced output without external coupling capacitors. It delivers 80 mW per channel into a 16Ω load and 60 mW into a 32Ω load with a variable gain setting controlled by external resistors. The device operates on a power supply voltage ranging from 2.4V to 5.5V, drawing only 0.1 µA in standby mode. Key performance metrics include a signal-to-noise ratio of 101 dB, total harmonic distortion plus noise of 0.006%, and a startup time of 80 µs.

Feature Summary

• Eliminates bulky DC-blocking capacitors through internal charge pump generation of negative voltage for direct headphone connection
• Maintains rich low-frequency response by preventing signal attenuation typically caused by output capacitors and load impedance
• Provides flexible gain configuration via external resistors while maintaining high audio fidelity

Applications

• Portable audio devices requiring reduced component count and board space
• Battery-powered equipment prioritizing low standby current consumption
• Audio systems demanding extended bass response without large output capacitors

Procurement Notes

Verify the specific suffix GE2 to confirm the SOP-J14 package and taping format specifications. Ensure compatibility with the required operating temperature range of -40°C to 85°C. Confirm RoHS compliance status matches project requirements. Validate that the application does not involve automotive use, as this product is not recommended for such environments. Check for any pending product change notices affecting electrical characteristics or packaging.

Selection Notes

Select this component when minimizing passive components and PCB area is critical for portable designs. Choose this model if variable gain control via external resistors is necessary rather than fixed gain options. Consider this part for applications requiring high signal-to-noise ratios and low distortion within a single-supply system. Evaluate the trade-off between the integrated charge pump complexity and the cost savings from removing large capacitors.

Part Context

This device belongs to Rohm's series of coupling capacitorless headphone amplifiers designed for compact consumer electronics. It utilizes a similar internal architecture to other models in the family but offers variable gain settings unlike fixed-gain variants. The SOP-J14 package provides a balance between thermal performance and footprint size suitable for general-purpose audio applications.

Replacement Considerations

Direct substitutes within the same family include the BD88410GUL, though it features fixed zero decibel gain rather than variable gain. Verify pinout compatibility and package dimensions when considering alternative packages like VCSP50L2. Ensure that the replacement maintains the required 80-mW output capability and charge pump functionality.