21ics Recently, Texas Instruments (TI) announced two dual-input audio operational amplifiers that provide excellent noise, distortion, and bandwidth performance with a current consumption of only 1.5 mA. The low-power dual-channel OPA1662 and 4-channel OPA1664 help system designers develop next-generation professional and semi-professional audio devices that deliver the ultimate in clear sound quality for live recording. This op amp is ideal for USB and FireWire audio systems, analog and digital mixers, portable recording systems, and other applications that require low noise and low power.
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Key features and benefits of the OPA1662 and OPA1664:
· Best Noise/Distortion Performance: Supports ultra-low total harmonic distortion at 1 kHz (0.00006%) with a low noise density of 3.3-nV/rt Hz to help design audio devices that perform much better than expected;
· Lowest power consumption: 1.5 mA per channel Low quiescent current helps designers to control power consumption within the system budget while ensuring clear sound quality;
· Higher signal integrity: a wide gain bandwidth of 22 MHz and a slew rate of 17 V/us for improved signal integrity and faster response for wider input signal frequencies;
· The widest power range: +/-1.5 V to +/-18 V or +3 V to +36 V for excellent dynamic performance under a wide range of loads.
System designers can combine the OPA1662 or OPA1664 with a PCM1792A 24-bit 192kHz sampled stereo audio digital-to-analog converter (DAC) to build an audio signal path.
Tools and support
The OPAMPEVM General Purpose Operational Amplifier Evaluation Board (EVM) can be used to accelerate the development of audio equipment using the OPA1662 and OPA1664. Active filter design tools help system designers design op amp filters. In addition, the TINA-TI SPICE model and reference designs are currently available for the OPA1662 and OPA1664 op amps.
Availability and packaging
The dual-channel OPA1662 in SO-8 and MSOP-8 packages is available now, along with the 4-channel OPA1664 in SO-14 and TSSOP-14 packages.
Wired headphones
Wired headphones have a plug-and-play setup. Simply plug it into your audio device and it can play your audio right away. With them, you don't run the risk of any unwelcome wireless interferences and pairing issues. Considering these factors, they're undeniably more user-friendly than wireless ones.
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