Last week TI put a preliminary datasheet online for the OPA1656, a low noise, very low distortion op amp targeting audio applications and fabricated in a CMOS process.
http://www.ti.com/product/OPA1656
I just checked and the sample button for the prototype devices is now active:
http://www.ti.com/product/OPA1656/samplebuy
I started this project in 2017 with the designer of the OPA1622, and although I had a change in my role at TI before the device was released to market, I'm still very proud of what was accomplished. The goals of the project were fairly straightforward:
1. Start with the OPA1688 architecture which gives very good distortion performance, even with low-impedance loads. Beef up the output stage even more.
2. Push the input voltage noise down as much as possible. Ideally below the OPA1652 and OPA1678 levels, which are fabricated in the same process.
3. Don't let power supply current limitations get in the way of performance. OPA2134 and NE5532 both have power supply currents of about 4mA per channel, and have been widely adopted in the market (understatement). That seemed like a reasonable target for the supply current of the OPA1656 as well.
A quick snapshot of the OPA1656 performance specs:
I'm looking forward to seeing what people think of the device, and hopefully it finds its way into a few projects on here!
Christmas comes a bit early this year! The single channel version of the OPA1656, called the OPA1655, released yesterday and the product page is now live on ti.com: https://www.ti.com/product/OPA1655
It doesn't look like units have been stocked yet for ordering, but they should be in-stock soon.
http://www.ti.com/product/OPA1656
I just checked and the sample button for the prototype devices is now active:
http://www.ti.com/product/OPA1656/samplebuy
I started this project in 2017 with the designer of the OPA1622, and although I had a change in my role at TI before the device was released to market, I'm still very proud of what was accomplished. The goals of the project were fairly straightforward:
1. Start with the OPA1688 architecture which gives very good distortion performance, even with low-impedance loads. Beef up the output stage even more.
2. Push the input voltage noise down as much as possible. Ideally below the OPA1652 and OPA1678 levels, which are fabricated in the same process.
3. Don't let power supply current limitations get in the way of performance. OPA2134 and NE5532 both have power supply currents of about 4mA per channel, and have been widely adopted in the market (understatement). That seemed like a reasonable target for the supply current of the OPA1656 as well.
A quick snapshot of the OPA1656 performance specs:
- 2.9nV/rtHz broadband voltage noise
- 6 fa/rtHz broadband current noise
- -131 dB THD+N at 1kHz, 600 ohm load, 3.5Vrms signal, 80-kHz measurement bandwidth
- 53 MHz gain bandwidth product, 24V/us slew rate
- >100mA output current
- 4.0mA typical supply current, 4.5mA max
I'm looking forward to seeing what people think of the device, and hopefully it finds its way into a few projects on here!
Christmas comes a bit early this year! The single channel version of the OPA1656, called the OPA1655, released yesterday and the product page is now live on ti.com: https://www.ti.com/product/OPA1655
It doesn't look like units have been stocked yet for ordering, but they should be in-stock soon.
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