• 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

• 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

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.

at T_A = +25°C, V_S = ±15V, and R_L = 2kΩ (unless otherwise noted)

Figure 5-1 Input Voltage Noise Density and Input Current Noise Density vs Frequency

Figure 5-3 Voltage Noise vs Source Resistance

Figure 5-5 Gain and Phase vs Frequency

Figure 5-7 THD+N Ratio vs Frequency

Figure 5-9 THD+N Ratio vs Frequency

Figure 5-11 THD+N Ratio vs Frequency

Figure 5-13 THD+N Ratio vs Output Amplitude

Figure 5-15 Channel Separation vs Frequency

Figure 5-17 Small-Signal Step Response

Figure 5-19 Small-Signal Step Response

Figure 5-21 Large-Signal Step Response

Figure 5-23 Large-Signal Step Response

Figure 5-25 Small-Signal Overshoot vs Capacitive Load

Figure 5-27 Small-Signal Overshoot vs Capacitive Load

Figure 5-29 Small-Signal Overshoot vs Feedback Capacitor

Figure 5-31 Phase Margin vs Capacitive Load

Figure 5-33 I_B and I_OS vs Temperature

Figure 5-35 Supply Current vs Temperature

Figure 5-37 Short-Circuit Current vs Temperature

Figure 5-39 Positive Overload Recovery

Figure 5-41 Open-Loop Output Impedance vs Frequency

Figure 5-2 0.1Hz to 10Hz Noise

Figure 5-4 Maximum Output Voltage vs Frequency

Figure 5-6 Closed-Loop Gain vs Frequency

Figure 5-8 THD+N Ratio vs Frequency

Figure 5-10 THD+N Ratio vs Frequency

Figure 5-12 THD+N Ratio vs Frequency

Figure 5-14 Intermodulation Distortion vs Output Amplitude

Figure 5-16 CMRR and PSRR vs Frequency (Referred-to-Input)

Figure 5-18 Small-Signal Step Response

Figure 5-20 Small-Signal Step Response

Figure 5-22 Large-Signal Step Response

Figure 5-24 Large-Signal Step Response

Figure 5-26 Small-Signal Overshoot vs Capacitive Load

Figure 5-28 Small-Signal Overshoot vs Capacitive Load

Figure 5-30 Percent Overshoot vs Capacitive Load

Figure 5-32 Open-Loop Gain vs Temperature

Figure 5-34 I_B and I_OS vs Common-Mode Voltage

Figure 5-36 Supply Current vs Supply Voltage

Figure 5-38 Output Voltage vs Output Current

Figure 5-40 Negative Overload Recovery

Figure 5-42 No Phase Reversal