Texas Instruments has introduced two bipolar-input audio operational amplifiers (op-amps) that provide enhanced noise, distortion and bandwidth performance while dissipating a mere 1,5 mA per channel.
The dual-channel OPA1662 and quad-channel OPA1664 enable system designers to develop the next generation of professional and ‘prosumer’ audio equipment capable of producing crisp, clean sound quality. They are targeted at USB and FireWire audio systems, analog and digital mixers, portable recording systems, and other applications that require low noise combined with low power consumption.
The ICs offer low 3,3 nV/rt Hz noise density with total harmonic distortion plus noise of 0,00006% at 1 kHz. A wide gain bandwidth of 22 MHz and slew rate of 17 V/μs provide high signal integrity and fast response to a wide range of input signal frequencies. An operating range of ±1,5 V to ±18 V or +3 V to +36 V provides excellent dynamic performance over a wide choice of loads.
System designers can build an audio signal path by combining the OPA1662 or OPA1664 with the PCM1792A 24-bit, 192 kHz sampling, stereo audio digital-to-analog converter (DAC). The OPAMPEVM universal op-amp evaluation module (EVM) is available to accelerate the development of audio equipment using the OPA1662 and OPA1664, while TI’s Active Filter Designer tool can help system designers implement an op-amp filter design.
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