PAM8901JER

Overview

The PAM8901JER is a stereo headphone amplifier from Diodes Incorporated, utilizing TrueCapFree architecture to eliminate DC-blocking capacitors. It operates on a single supply voltage ranging from 2.5V to 5.5V and delivers up to 35mW per channel into a 16Ω load at 1kHz with 1% THD+N. The device features an integrated charge pump generating positive and negative rails for zero-volt output biasing. Electrical characteristics include a quiescent current of 4mA, shutdown current below 1µA, and a power supply rejection ratio of 75dB at 1kHz. Gain settings are selectable via G0 and G1 pins, offering -6dB, 0dB, 3dB, or 6dB options.

Feature Summary

• TrueCapFree Architecture: Generates ground-referenced outputs using internal charge pumps, removing the need for external DC-blocking capacitors.
• Low Power Consumption: Achieves less than 1µA current draw in shutdown mode to extend battery life in portable devices.
• High Fidelity Performance: Delivers low total harmonic distortion plus noise (0.03%) and high signal-to-noise ratio (100dB) for clear audio reproduction.
• Integrated Protection: Includes short-circuit protection and thermal shutdown to ensure reliable operation under fault conditions.

Applications

• Smart Phones and Cellular Phones
• Notebook Computers
• Portable DVD Players
• Personal Digital Assistants (PDAs)
• Digital Still Cameras

Procurement Notes

Verify the component marking code against official Diodes Incorporated documentation to confirm authenticity. Ensure the package type matches the TQFN3x3-16L specification. Confirm RoHS compliance status through the manufacturer's environmental declaration. Check for any specific handling requirements related to moisture sensitivity levels during storage and assembly processes.

Selection Notes

Select this component for applications requiring space-constrained stereo audio amplification without bulky output capacitors. Consider the selectable gain settings (-6dB to 6dB) when matching input signal levels. Evaluate the 2.5V to 5.5V supply range compatibility with the system's power architecture. Verify that the 16Ω load impedance aligns with the target headphone specifications for optimal power delivery.

Part Context

The PAM8901 belongs to Diodes Incorporated's portfolio of audio amplifiers designed for portable electronics. It serves as a specialized solution for mobile devices where board real estate is limited. The TrueCapFree technology distinguishes it from traditional Class AB amplifiers by integrating the charge pump directly within the IC. This integration simplifies the bill of materials and reduces the overall footprint of the audio subsystem.

Replacement Considerations

The datasheet explicitly recommends using the PAM8908 instead of the PAM8901 for new designs. Both components share similar stereo capabilities and packaging, but the PAM8908 represents the updated iteration. Verify pinout compatibility and electrical parameter alignment before substituting the PAM8901 with the PAM8908 in existing circuits.