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25mW True CAP Free Stereo Headphone Driver

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The PAM8908 stereo headphone driver is designed for portable equipment where board space is at a premium. The PAM8908 uses a unique, patent pending architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost , board space, and component height. The PAM8908 delivers up to 25mW per channel into a 16Ω load and has low 0.03% THD+N. A high power-supply rejection ratio allows this device to operate from noisy digital supplies without an additional linear regulator. The PAM8908 operates from a single supply from 2.5V t o 5.5V, has short-circuit and over temperature protection. Shutdown mode reduces supply current to less than 1μA.


  • Smart Phones/Cellular Phones
  • Notebook Computers
  • Portable DVD Player
  • Personal Digital Assistants (PDAs )
  • Electronic Dictionaries
  • Digital Still Cameras
  • Portable Gaming


  • Patent Pending 3 Phase Power Line Shift Charge Pump Eliminates Need for DC-BlockingCapacitors
  • TrueCapFree Architecture, Output Biased at 0V (System Ground)
  • Excellent Low Frequency Fidelity
  • High PSRR
  • Less Than 1μA Shutdown Current
  • Support Both Fully Differential and Single Ended Inputs
  • Short Circuit and Over Temperature Protection
  • Selectable Gain Settings: -6dB, 0dB, 3dB and 6dB
  • Available in Space Saving Packages: TQFN3x3-16L

Product Specifications

Product Parameters

Minimum VDD (V) 2.5
Qualified to AECQ10x No
Compliance (Only Automotive supports PPAP) No
Maximum VDD 5.5 V
IQ 4 mA
Power/CH (W) @ THD=10% N/A
Power/CH (W) @ THD=1% 0.035
Mono or Stereo Stereo
SE Yes
Class-D or AB D
Power Limit No
Anti-Sat No
Headphone Out Yes
Efficiency N/A %
Volume/ Gain 4-Settings
Gain Min -6 dB
Gain Max 6 dB
SNR 100 dB
PSRR 75 dB
Special Feature N/A

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Technical Documents

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 1785 6/14/2021 Europe, Asia, North America Buy Now
Farnell, An Avnet Company 2978 6/14/2021 England Buy Now
Farnell, An Avnet Company 2978 6/14/2021 England Buy Now
Mouser Electronics Inc. 2776 6/14/2021 South America, North America, Asia, Europe, Middle East Buy Now
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Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site