1 Features
1• High-Fidelity Sound Quality
• Ultralow Noise: 2.8 nV/√Hz at 1 kHz
• Ultralow 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

2 Applications
• High-Fidelity (HiFi) Headphone Drivers
• Professional Audio Equipment
• Analog and Digital Mixing Consoles
• Audio Test and Measurement
• High-End Blu-ray™ Players
• High-End Audio and Video (A/V) Receivers

3 Description
The OPA1622, dual, bipolar-input, SoundPlus™
audio operational amplifier achieves a very low,
2.8-nV/√Hz noise density with an ultralow THD+N of
–119.2 dB at 1 kHz and drives a 32-Ω load at 100-
mW output power. The OPA1622 offers extremelyhigh
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 per –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 unitygain
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.