Produit professionnel excellent. Offset quasiment nul même à grand gain. Ne remplace pas la version 990 Enh plus adaptée aux sources basse impédance.
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Sonic Imagery Labs' Model 995FET-TICHA is a high-performance, discrete operational amplifier (OPA) designed for professional audio applications and areas where ultra-low noise, low distortion and highly linear, uncolored operation are required. A matched-pair FET input stage is integrated to provide superior sound quality and speed for outstanding audio performance. This, combined with a high output level and excellent DC performance, enables use in a wide variety of applications. What's more, the 995FET's output amplitude allows for increased headroom, making it ideal for any audio circuit.
The OPA 995FET-TICHA can operate over a supply range of ±10V to ±24V. The input cascode circuit provides excellent common-mode rejection and maintains a low input bias current over its wide input voltage range, minimizing distortion. It is also stable at unity gain and offers excellent dynamic behavior over a wide range of load conditions.
The fully discrete SMT design uses a pair of highly accurate matched differential FETs to meet the requirements of ultra-low noise and THD audio systems. In addition to the enhanced input stage, the 995FET-TICHA uses high-precision, temperature-stable, supply-independent current sources. Supply-independent current sources ensure that the bias remains locked at the optimum operating point, whatever the supply voltage. The low-distortion Class A output stage can absorb or supply 250mA, enabling this module to drive transformers with ease.
Built-in heat sinks for the power transistors, combined with an anodized aluminum case, allow the Sonic Imagery Labs 995FET-TICHA to operate within a wide safe area (SOA) and not suffer from Beta drop when using heavy loads. Each amplifier is fully individually tested and meets or exceeds published specifications.
Technical characteristics
Specifications | |
---|---|
Product type | OPA |
THD+N | 0.00048% @ 1kHz |
Noise | 1.1nV/rtHz typ. |
Output current | 250mA |
Output level | +26.5dBu @ 600Ω |
Supply voltage range | ±10V to ±24V |
Input offset voltage (Vos) @ Rs=0Ω, Av=unitary | Typ : 1.0mV Max : 2.5mV |
Input offset current (Ios) | Typ : 200pA |
Input bias current (Ib) | Min : 400pA Typ : 500uA Max : 600uA |
Voltage gain (open loop) (Avol) @ -3dB, 28Hz | Min : 108dB Typ : 110dB Max : 112dB |
Output voltage swing (Vom) @ Vs=±24V, Rl=600Ω, Av=10 | Min : 41Vpp Typ : 42Vpp |
Output voltage swing (Vom) @ Vs=±24V, Rl=75Ω, Av=10 | Min : 38Vpp Typ : 38.5Vpp |
Input common mode range (Vcm) @ Rl=600Ω | Min : ±12V Typ : ±12.5V |
Common mode rejection ratio (CMRR) | Typ : 90dB |
Power supply rejection ratio (PSRR) | Typ : 110dB |
Supply current (Iq) @ Vo=0, gnd inputs, Vcc=+24V | Min : 15mA Typ : 17mA Max : 19mA |
Supply current (Iq) @ Vo=0, gnd inputs, Vee=-24V | Min : 22mA Typ : 24mA Max : 27mA |
Slew rate (SR) @ Rl=600Ω | Min : 21V/uS Typ : 22V/uS Max : 23V/uS |
Slew rate (SR) @ Rl=75Ω | Min : 19.7V/uS Typ : 20.5V/uS Max : 21V/uS |
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Roland T.