Dual Discrete Op-Amp
Audiophile dual discrete op-amp in a DIP8 package. Compatible with a huge number of high-end audio appliances.
FOR PROFESSIONAL AUDIO EQUIPMENT
The Dual Discrete Op-Amp is specially designed for audio and is among the most musical sounding dual discrete op-amps out there. It is available in DIP8 format and can be used in any CD player, DAC or preamplifier that currently uses DIP8-based IC dual op-amp types.
The overall soundstage and transient detail will be greatly improved when used in pretty much all audio equipment that it can physically be fitted to. It has a very low-noise JFET front end so it can be used with input impedances above 1 Mega-ohm if needed. It can replace the following, provided the equipment it’s being used in has 22mm of height clearance and 5mm side clearance (per side).
- OPA2604
- OPA2134
- TL072
- NE5532
- LM4562
- OP275
- OP285
Please check that the appliance’s power supply can supply the extra current needed, especially if replacing more than one existing IC op-amp with our op-amp. As with all discrete types, this op-amp draws more current than most IC types. Please refer to the spec sheet for details.
The Orange Dual Discrete Op-Amp is unity gain stable. When using it in new designs where gain (inverting or non inverting) is being added, a feedback loop bypass capacitor of 15pf is all that’s needed to completely stabilise it. The spec-sheet shows a max +/- rail voltage of 18 volts.
All tests up until now have been conducted with this voltage along with +/-15 volts. As soon as we have test results using it on rails of +/-24 volts, we will add it to the spec sheet.
‘I wanted to design something purely for audio. Many Op-Amps perform well on paper but the trouble is, the human ear does not hear quite the same way as test equipment. To me, this Op-Amp sounds more musical, more natural, with the transient sound feeling more real and less synthetic.’
| Maximum Ratings & Supply Voltage | Minimum: +/- 4.5V | Typical: +/-15V | Maximum: +/-18V |
|---|---|
| Operating Ambient Temperature | -25 to 50 Degrees C |
| Storage Temperate Range | -60 Degrees to 80 Degrees C |
| Quiescent Current (+/- 15V) | 18mA |
| Input Offset Voltage (+/- 15V) | 0.2mV |
| Input Offset Current (mA) | Minimum: 0.05mA | Typical: 0.1mA | Maximum: 0.15mA |
| Input Bias Current (uA) | Minimum:110uA | Typical: 190uA | Maximum: 300uA |
| Open Loop Gain (dB) | 112dB |
| Open Loop Bandwidth (RL=600 Ohms) | 48Khz |
| Gain Bandwidth Product (@ 100kHz) | 50MHz |
| Slew Rate (f = 10KHz; RS = 2K) | Minimum:38V/uS| Typical: 52V/uS | Maximum: 55V/uS |
| Input Resistance (K Ohm) | 50M Ohms |
| Crosstalk Distortion (f = 1KHz; RS = 600 Ohms) | >90dB |
| Total Harmonic Distortion (% 1KHz @ 2V Output RL=600 Ohms) | 0.002% |
| Output Impedance (AV = 30dB Closed Loop f = 10KHz, RL = 600 Ohms) | 0.3 Ohms |
