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, 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.
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