TI aims at audio with low-noise low-power op amps
Texas Instruments has introduced two bipolar input op amps for sound mixers and USB audio systems.
Called OPA1662 (dual) and OPA1664 (quad), quiescent current is 1.5mA per channel with 3.3nV/?Hz noise density and 0.00006% total harmonic distortion plus noise at 1kHz.
“These op amps are targeted at USB and FireWire audio systems, analogue and digital mixers, portable recording systems, and other applications that require the highest noise performance combined with low power consumption,” said the firm.
Gain bandwidth is 22MHz, slew rate is 17V/µs, and the amps will operate from +/-1.5 to 18V dual rails or 3 to 36V single rail.
“System designers can build an audio signal path by combining the OPA1662 or OPA1664 with the PCM1792A 24bit, 192kHz sampling, stereo audio DAC,” said TI.
The 1622 comes in SO-8 and MSOP-8 packages, and 1664 in SO-14 and TSSOP-14.
Support comes from the OPAMPEVM universal op amp evaluation module and Active Filter Designer tool. TINA-TI SPICE models and reference designs are available.