SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)

SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
SparkoS Labs has created a range of discrete DIP8-mounted PDOs optimized to deliver excellent audio performance. They will allow you to replace less powerful AOP or quite simply to obtain a different sound.

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Shipping date: 23-07-2024.

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SparkoS Labs SS3601

Discrete Single OPA DIP8 (Unit)

SparkoS Labs SS3601 AOP Discret Simple DIP8 (Unité)

SparkoS Labs has created a range of discrete DIP8-mounted OPAs optimized to deliver excellent audio performance. They will allow you to replace less powerful OPA or quite simply to obtain a different sound. Moreover, with their reduced dimensions, measuring a third of the size of any other discrete OPA, they will integrate without problem in your devices and projects.

Class A biasing and high output current capacity, coupled with a proprietary compensation system requiring multiple NPO dielectric capacitors make these discrete amplifiers impossible to manufacture as monolithic integrated circuits.

Why discrete OPA ?

SparkoS Labs OPA easily outperform any monolithic OPA in terms of open loop gain, noise, output current and Class A bias current amplitude. Even the OPA OPA627 which has a good reputation is more expensive for a lower gain of 30dB and noise about twice as high. The table opposite compares the performance of SparkoS Labs OPAs and monolitchic OPAs.

SparkoS Labs AOP SS3601

SparkoS Labs Technology

Presentation :
All of SparkoS Labs OPAs are bases on Lin 3 Stage topology consisting of an input stage differential pair, a gain stage (VAS) and an output stage, all biased in Class A with two pole compensation. All active components are Bipolar Junction Transistors (BJT) to obtain the greatest linearity. Components are fully protected  from over current by active current limit circuitry in the output and gain stages. They are also protected from large differential input voltages by high-speed Schottky diodes.

Input stage :
The input stage of the SparkoS Labs OPAs contain a dual matched pair of NPN BJTs. Input offset voltage is factory trimmed and typically turns out to be better than 250uV @+/- 12VCC. A cascode Wilson current mirror is utilized as the active load for the input differential pair, for precise current matching between the input pair transistors.

Gain stage (VAS) :
The gain stage is a cascode loaded Darlington for the highest linearity and open loop gain possible. The cascode biasing voltage is derived from precision shunt references, wihch have a much lower dynamic impedance and lower noise than the low voltage Zener diodes which are commonly used to derive the bias voltage. The gain stage is also current limited for a better stability.

Output stage :
The output stage is a push-pull emitter-follower biased in Class A with 8mA standing current. Due to push-pull action, the output stage can source or sink 16mA of current and still remain in class A mode. The output stage will automatically revert to class AB in th event that more output current is demanded. Active current limiting is employed in the output stage to protect it from an over current situation. The output transistors are high gain individual devices in SOT23 package, manufactured by Diodes, Inc. who have developed an encapsulation methode to dissipate two to three times the power of a typical SOT23 packaged components. By using these output components, SparkoS Labs OPAs can have a high Class A bias current and the ability to source or sink far more output current than comparable monolithic IC. 

Compensation :
All the discret OPAs from SparkoS Labs empliy a uniquely implement 2 pole compensation scheme tjat is extremely tolerant of capacitive loading. This allows these discrete OPAs to be used on many PCB in many projects without any stability issue. Two pole compensation despite its superirority ton single pole schemes, in not often used  in monolithic OPAs because of the fabrication difficulty. Capacitors in monolitics OPAs consume a large amount of space on the die so it isn't possible to add more capacitors. SparkoS Labs OPAs are using 3 compensation capacitors so it's not possible to fabricate these OPAs as  monolothics IC. 

Schéma

SparkoS Labs AOP SS3601

Technical characteristics

Technical specifications
OPA TypeSimple discrete Class A OPA
SupportDIP8
Open loop gain140dB
Noise415nV RMS up to 20kHz
Max voltage+/- 18VCC
Output current15mA Class A
Max output current65mA
Supply power14mA
Offset< 300µV
Contacts platingGold
Others featuresOptimized for high performance audio use
2 pole compensation
NPO capacitors
Dimensions13.75 x 15 x 11.68mm
 
Data sheet
OPA TypeSingle
 
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Average votes
5.0 / 5
7 reviews
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 5/5
Date :
Sparkos
Voilà une merveille qui n'est pas une illusion. Il mérite 100%
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This review has been posted for SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
Note :
 5/5
Date :
the perfect upgrade for my x7 soundcard
Bought two of these and two ss3602 for my creative X7 soundcard.
They are a perfect upgrade, because
- they are small, you can´t close the hatch anymore because of the height of the ss3603, but you can still place the x7 on your desk normally

- you can HEAR the difference. I use it with a grado RS1, and the sound became more detailed

Awesome piece of hardware!
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This review has been posted for SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
Note :
 5/5
Date :
Transfigure mon DAC Fostex HPA8C
Complément de mes commentaires laissés sur l'AOP Burson Supreme sound orange.
Je souhaité remplacer les AOP des étages de sortie de mon DAC par des Burson mais la place manquait en hauteur pour les loger. J'ai alors exploré les autres solutions et je suis ravi d'avoir essayé ces Sparkos selon les conseils d'Audiophonics . Ils m'apparaissent extrêmement performants et dopent mon DAC désormais capable driver tout type de charge. Le son n'est plus seulement bon en sortie casque mais aussi sur mon ampli.
Attention, ces AOP sont plus longs et plus larges que les AOP d'origine. Il faut leur faire de la place. Je n'ai pas voulu utiliser de prolongateur, ceci a nécessité de souder les petits condensateurs aux dos de la carte et d'éloigner les gros condensateurs de quelques mm . Je pensais mon DAC de 2014 dépassé, avec ces deux transformations il sonne aussi bien que les DAC actuels du commerce à plus de 2000€.
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This review has been posted for SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
Note :
 5/5
Date :
AOP au top
Un véritable gain de définition du signal audio, détail et précision : un super produit. Facile à mettre en oeuvre car assez compact, en remplacement d'un CI existant. Ca m'ouvre de belles promesses de réalisations futures. N'hésitez pas ça vaut son prix.
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This review has been posted for SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
Note :
 5/5
Date :
Une alternative aux Burson
J’ai branché deux Sparkos SS3601 sur un DAC AK4497 à la place de deux Burson V6 classic, les Sparkos se placent très facilement sur les support DIP8. Après une semaine de rodage, le son des Sparkos est plus défini, plus détaillé, plus transparent la localisation des instruments très précise en largeur et en profondeur. Pourtant, je conserve mes Burson, qui sont un peu moins brillant dans le médium/aigu mais donnent plus de relief aux instruments, c’est le constat sur mes enceintes isodynamiques. J’ai apporté les Burson chez un ami qui possède un DAC DIY avec TDA1541/OPA627 et des enceintes Proac reponse 3 avec membranes en polypropylène et là les Sparkos ont amélioré la restitution de manière incroyable.
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This review has been posted for SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
 
SPARKOS LABS SS3601 Single Discrete OPA DIP8 (Unit)
SparkoS Labs has created a range of discrete DIP8-mounted PDOs optimized to deliver excellent audio performance. They will allow you to replace...

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