General Description

NJU72315 / NJU72322 are high performance audio volumes.
Employing external amplifiers will offer designer more flexible circuit design chance.
NJU72315 employs small package that is suitable for potable audio equipment, so achieve low operating voltage, ultra-low noise and ultra-low distortion.
NJU72322 is a product to increase productivity while following MUSES series development concept.
NJU72315 / NJU72322 are suitable for high-end audio equipment and professional audio equipment pursuing high performance and high quality sound.

Features

• • High performance
    • NJU72315
      1. – Low operating voltage, Analog: ±3.0 to ±5.5V, Digital: +1.6 to +3.6V
      2. – Low noise / low distortion ^※1
      3. – SNR 130dB with Ultra-low noise
      4. – Reduce the noise generated during volume adjustment combining zero cross detection circuit ^※2 and soft step circuit ^※3
      5. – Small package　WCSP16 (1.9mm x 1.9mm x 0.41mm)
    • NJU72322
      1. – High dynamic range with the operating voltage up to ±18V
      2. – 0.5dB step adjustment
      3. – Low noise / low distortion ^※1

• Flexible design for sound quality
  • Conventional semiconductor volume has advantage of less variation between channels compared mechanical volume such as variable resistor. But sound quality depends on the built-in amplifiers.
    NJU72315 / NJU72322 are not conventional configuration of built-in amplifier, they need configure external amplifiers, so flexibility for sound quality design is improved. Combined with the MUSES series amplifiers, higher quality sound system can be achieved.

Fig.1 Configuration of common volume ICC                                  Fig.2 Configuration of volume IC with external amplifiers

Application

• High-end audio equipment
• Professional audio equipment
• Car audio system
• Portable audio equipment

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