OPA604AP is a single operational amplifier, OPA2604AP is a dual operational amplifier. They are all dedicated operational amplifiers specially designed for audio. They have a mellow tone, mellow, neutral warmth, and strong guts. They are known as the operational amplifiers with the most tube tone. The price was not low back then, but it was still chosen by many audiophiles as the upgrader of the motorcycle.
OPA2604AP is a dual-channel FET input high-performance audio operational amplifier. It has low distortion, low noise, high signal-to-noise ratio, and high bandwidth. It is widely used in high-quality audio circuits and other circuits that require first-class dynamic performance.
The low-noise FET input circuit of OPA2604AP provides a large dynamic range and extremely small offset voltage. The operating voltage range can be from ±4.5V to ±24.0V. The distortion is only 0.0003% at 1KHz, the conversion rate is 25V/μs, and the gain bandwidth It is 20MHz.
It can be directly replaced with low- and mid-range dual op amps such as 5532, which will have a good effect, and the work is equal to ±15.0V for better results.
Data sheet: http://www.ti.com/lit/ds/symlink/opa2604.pdf
Brand: Texas Instruments / TI Burr Brown
Model: OPA2604AP Low distortion and low noise FET input high performance audio operational amplifier
Specification: DIP8 double row eight-pin straight plug plastic package
Voltage: ±4.5V~±24.0V
Distortion: 0.0003% 1KHz
Noise: 10nV/ √ ^Hz
Speed: 25V/μs
Bandwidth: 20MHz
Replacing the op amp requires certain electronic knowledge, hands-on ability, and risk. Our shop has passed the instrument test and audition before the op amp is sent out;
Advanced op amps are precision integrated circuit products that are very squeamish. In any case, wrong pins or electrostatic breakdown may cause irreversible damage;
Do not use a hot air gun when soldering the patch op amp. The soldering temperature of the soldering iron must be lower than 300 degrees, otherwise the chip will be damaged;
The operational amplifier can be taken out of the package before welding, and a soldering iron or anti-static soldering station with a solid grounding can be used;
Wear pure cotton clothing for welding operations or wear anti-static clothing;
Wear anti-static bracelets and gloves If you have no conditions, you can do simple protection with one end of copper wire wrapped around your wrist and the other end to connect to the water pipe. Both hands should be used to reduce the consequences of accidental electric shock.