OPA2134PA vs OPA2604AP vs OPA1611AID Comparison

The OPA2134 is a ultra-low distortion, low noise operational amplifiers fully specified for audio applications. A true FET input stage was incorporated to provide superior sound quality and speed for exceptional audio performance. This in combination with a high output drive capability and excellent dc performance allows use in a wide variety of demanding applications. In addition the OPA2134"s wide output swing, to within 1V of the rails, allows increased headroom making it ideal for use in any audio circuit. OPA2134 op amps are easy to use and free from phase inversion and overload problems often found in common FET input op amps.

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Superior sound quality

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Ultra low distortion

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Low noise

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True FET-input

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High speed

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High open-loop gain

The OPA2604AP is a dual FET input, low distortion operational amplifier in 8 pin DIP package. It is designed for enhanced AC performance. Very low distortion, low noise and wide bandwidth provide superior performance in high quality audio and other applications requiring excellent dynamic performance. New circuit techniques and special laser trimming of dynamic circuit performance yield very low harmonic distortion. The result is an op amp with exceptional sound quality. The low noise FET input of OPA2604 provides wide dynamic range even with high source impedance. Offset voltage is laser trimmed to minimize need for interstage coupling capacitors.

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Wide gain bandwidth of 20MHz at G = 100

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High slew rate of 25V/µs

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Unity gain stable

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Wide supply voltage range from ±4.5V to ±24V

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Low distortion of 0.0003% at 1KHz

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Low noise of 10nV/√Hz

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Common mode rejection of 100dB

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Input offset voltage of ±1mV

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Input bias current of 100pA

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Operating temperature range from -25°C to 85°C

The OPA1611AID is a low power precision Operational Amplifier achieves very low 1.1nV/√Hz noise density with an ultralow distortion of 0.000015% at 1kHz. The OPA1611 offers rail-to-rail output swing to within 600mV with a 2kR load, which increases headroom and maximizes dynamic range. This device also have a high output drive capability of ±30mA.This device operate over a very wide supply range of ±2.25 to ±18V, on only 3.6mA of supply current per channel. The OPA1611 op-amp is unity-gain stable and provide excellent dynamic behaviour over a wide range of load conditions. The dual version features completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

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Superior sound quality

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1.1nV/√Hz at 1kHz Ultralow noise

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Unity gain stable

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0.000015% at 1kHz Ultralow distortion

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3.6mA per Channel low quiescent current

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Rail-to-rail output

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Green product and no Sb/Br