OPA1622 SoundPlus™ Operational Amplifier

OPA1622 SoundPlus™ Operational Amplifier

Texas Instruments' OPA1622, dual, bipolar-input, SoundPlus audio operational amplifier achieves a very low 2.8 nV/√Hz noise density with an ultra-low THD+N of -119.2 dB at 1 kHz, while driving a 32 Ω load at 100 mW output power. The OPA1622 offers extremely high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 ideal for use in portable-audio applications. This device also has a high output-drive capability of +145 mA / -130 mA.

The OPA1622 operates over a very wide supply range of ±2 V to ±18 V, on only 2.6 mA of supply current per channel. The OPA1622 op amp is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions. The OPA1622 includes a shutdown mode, allowing the amplifiers to be switched from normal operation to a standby current that is typically less than 5 µA. This shutdown feature is specifically designed to eliminate click and pop noise when transitioning into or out of shutdown mode.

The OPA1622 features a unique internal layout for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. This device is specified from -40°C to 125°C.

Features
  • High-fidelity sound quality
  • Ultra-low noise: 2.8 nV/√Hz at 1 kHz
  • Ultra-low total harmonic distortion + noise:
    -119 dB THD+N (142 mW/Ch into 32 Ω/Ch)
  • Wide gain bandwidth product: 32 MHz (G = +1000)
  • High slew rate: 10 V/µs
  • High capacitive-load drive capability: > 600 pF
  • High open-loop gain: 136 dB (600 Ω load)
  • Low quiescent current: 2.6 mA per channel
  • Low-power shutdown mode with reduced pop and click noise: 5 µA per channel
  • Short-circuit protection
  • Wide supply range: ±2 V to ±18 V
  • Available in small VSON-10 µpackage

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