(ACTIVE) +/-5V Stereo Audio Volume Control


Functional Diagram


The PGA2311 device is a high-performance, stereo audio volume control designed for professional and high-end consumer audio systems. The PGA2311 uses an internal high-performance operational amplifier to yield low noise and distortion. The PGA2311 also provides the capability to drive 660-Ω loads directly without buffering. The 3-wire serial control interface allows for connection to a wide variety of host controllers, in addition to support for daisy-chaining of multiple PGA2311 devices.


  • Digitally-Controlled Analog Volume Control:
    • Two Independent Audio Channels
    • Serial Control Interface
    • Zero Crossing Detection
    • Mute Function
  • Wide Gain and Attenuation Range:
    +31.5 dB to −95.5 dB with 0.5-dB Steps
  • Low Noise and Distortion:
    • 120-dB Dynamic Range
    • 0.0004% THD+N at 1 kHz (U-Grade)
    • 0.0002% THD+N at 1 kHz (A-Grade)
  • Noise-Free Level Transitions
  • Low Interchannel Crosstalk: −130 dBFS
  • Power Supplies: ±5-V Analog, +5-V Digital
  • Available in PDIP-16 and SOIC-16 Packages
  • Pin- and Software-Compatible With the Crystal


Number of channels (#) 2    
Power supply (V) +/-5    
Gain & attenuation (dB) +31.5 to -95.5 with 0.5dB steps    
THD + N @ 1 kHz (%) 0.0002    
Interchannel crosstalk @ 1 kHz (dBFS) -130    
Gain error (gain=31.5dB) (dB) ±0.05    
Dynamic range (dB) 120    
Voltage swing with max supply (Vpp) 7.5    
Load capacitance (pF) 100    
Operating temperature range (C) -40 to 85    
Package Group PDIP|16^SOIC|16    

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