1 Features
• Low noise: 3.3nV/√Hz at 1kHz
• Low distortion: 0.00006% at 1kHz
• Low quiescent current:
1.5mA per channel
• Slew rate: 17V/μs
• Wide gain bandwidth: 22MHz (G = +1)
• Unity gain stable
• Rail-to-rail output
• Wide supply range:
±1.5V to ±18V or 3V to 36V
• Dual and quad versions available
• Small package sizes:
Dual: SOIC-8 and VSSOP-8
Quad: SOIC-14 and TSSOP-14

2 Applications
• USB and firewire audio systems
• Analog and digital mixers
• Portable recording systems
• Audio effects processors
• High-end A/V receivers
• High-end DVD and Blu-Ray™ players
• High-end car audio

3 Description
The dual OPA1662 and quad OPA1664 (OPA166x)
series of bipolar-input SoundPlus™ audio operational
amplifiers achieve a low 3.3nV/√Hz noise density
with an ultra-low distortion of 0.00006% at 1kHz.
The OPA166x series of op amps offer rail-to-rail
output swing to within 600mV with 2kΩ load, which
increases headroom and maximizes dynamic range.
These devices also have a high output drive capability
of ±30mA.
These devices operate over a very wide supply range
of ±1.5V to ±18V, or 3V to 36V, on only 1.5mA of
supply current per channel. The OPA166x op amps
are unity-gain stable and provide excellent dynamic
behavior over a wide range of load conditions.
These devices also feature completely independent
circuitry for lowest crosstalk and freedom from
interactions between channels, even when overdriven
or overloaded.
The OPA166x are specified from –40°C to +85°C.