INA1620 - INA1620 High-Fidelity Audio Operational Amplifier With Integrated Thin-Film Resistors

The INA1620 integrates 4 precision-matched thin-film resistor pairs and EMI filteringon-chip with a low-distortion, high output current, dual audio operational amplifier. The amplifierachieves a very low,
2.8-nV/√Hz noise density with an ultra-low THD+N of –119.2 dB at 1 kHzand drives a 32-Ω load at 150-mW output power. The integrated thin-film resistors are matched towithin 0.004% and can be used to create a large number of very high-performance audio circuits.

The INA1620 operates over a very wide supply range of ±2 V to ±18 V on only 2.6 mA ofsupply current per channel. The INA1620 also has a shutdown mode, allowing the amplifiers to beswitched from normal operation to a standby current that is typically less than 5 µA. Shutdown modeis specifically designed to eliminate click-and-pop noise when transitioning into or out ofshutdown mode.

The INA1620 has a unique internal layout for lowest crosstalk, and freedom frominteractions between channels, even when overdriven or overloaded. This device is specified from–40°C to +125°C.

• High-Quality Thin-Film Resistors
  Matched to 0.004% (Typical)
• Integrated EMI Filters
• 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 24-pin WQFN Package

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