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Product Detailed Parameters
- Description：IC AMP CLASS AB STER 35MW 16TQFN
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Class AB
- Output Type：2-Channel (Stereo) with Stereo Headphones
- Max Output Power x Channels @ Load：35mW x 2 @ 16Ohm
- Voltage - Supply：2.5V ~ 5.5V
- Features：Short-Circuit and Thermal Protection
- Mounting Type：Surface Mount
- Supplier Device Package：U-QFN3030-16
- Package / Case：16-UFQFN Exposed Pad
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The PAM8908JER is a true cap-free stereo headphone amplifier manufactured by Diodes Incorporated. It operates from a single supply voltage ranging from 2.5V to 5.5V and delivers up to 60mW per channel into a 32Ω load at 5.0V, or 36.5mW into a 16Ω load at 3.6V. The device features an integrated three-phase power line shift charge pump that eliminates the need for external DC-blocking capacitors. It provides low total harmonic distortion plus noise of 0.03% and a high power-supply rejection ratio of 80dB at 1kHz. Shutdown current is less than 1µA.
Feature Summary
- Patent-pending three-phase charge pump architecture enables true cap-free operation with outputs biased at system ground.
- Supports selectable closed-loop voltage gain settings of -6dB, 0dB, 3dB, and 6dB via digital control pins.
- Includes short-circuit protection and overtemperature protection with auto-recovery functionality.
- Operates with extremely low shutdown current of less than 1µA to maximize battery life in portable devices.
Applications
- Smart phones and cellular phones
- Notebook computers
- Portable DVD players
- Personal digital assistants (PDAs)
- Electronic dictionaries
Procurement Notes
Verify the specific ordering suffix JER corresponds to the Tape & Reel packaging format containing 3000 units. Confirm the U-QFN3030-16 Standard package dimensions match the PCB footprint requirements. Ensure compliance with RoHS 3 and REACH regulations as specified in the manufacturer's documentation before finalizing procurement.
Selection Notes
Select this component when board space is limited and external DC-blocking capacitors must be eliminated. It is suitable for applications requiring high power-supply rejection to operate cleanly from noisy digital supplies. Verify that the required gain setting can be accommodated by the G0 and G1 pin configurations and that the input coupling capacitor values align with the desired high-pass filter corner frequency.
Part Context
The PAM8908 belongs to Diodes Incorporated's portfolio of audio amplifiers designed for portable consumer electronics. It utilizes a unique patent-pending architecture to generate ground-referenced outputs from a single supply. This design philosophy focuses on reducing component count and physical height while maintaining high audio fidelity standards for mobile communication and multimedia devices.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation.
FAQ
How does the PAM8908 eliminate the need for output DC-blocking capacitors?
It uses a patent-pending three-phase power line shift charge pump to generate positive and negative supply rails, biasing the output at 0V (system ground) to allow AC signal swings without large blocking capacitors.
What is the maximum shutdown current for the PAM8908?
The shutdown current is less than 1µA when the EN pin is set to logic low.
Can the PAM8908 accept both differential and single-ended inputs?
Yes, the device supports both fully differential and single-ended input configurations.
