SONIC IMAGERY LABS 252AP Discrete OPA

SONIC IMAGERY LABS 252AP Discrete OPA High Performance DIP2520/990 (Unit) New
Sonic Imagery Labs' model 252AP is a high-performance, discrete operational amplifier (OPA) designed for professional audio applications and areas where ultra-low noise and low distortion are required. The 252AP is particularly well suited to circuits with medium to high source impedance, and to microphone input transformers with high transformation ratios (> 1:4).
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Sonic Imagery Labs 252AP Discrete OPA High Performance DIP2520/990 (Unit)

AOP Sonic Imagery Labs 252AP

Sonic Imagery Labs' model 252AP is a high-performance, discrete operational amplifier (OPA) designed for professional audio applications and areas where ultra-low noise and low distortion are required. The 252AP is particularly well suited to circuits with medium to high source impedance, and to microphone input transformers with high transformation ratios (> 1:4).

The 252AP is a modern re-engineering of the classic 2520 discrete OPA.It has been designed as an improved, higher-performance replacement model, with particular attention to superior AC and DC performance. Pin-outs conform to the 2520/990 package, allowing direct replacement.

The fully discrete SMT design is similar to the basic API2520 topology, but has been redesigned to use two pairs of ultra-precise, perfectly matched differential input transistors, specially designed to meet the requirements of ultra-low noise, ultra-low THD audio systems. These transistors are specifically selected by Sonic Imagery Labs to meet the brand's noise, Vos, Ic and Vbe specifications.

DC performance is far superior to that of analog models. With an offset voltage better than ±35uV (at Av1) and an input leakage of less than <30nA, the 252AP is ideally suited to DC-coupled audio applications where output offset errors cannot be tolerated.

In addition to the improved input stage, and unlike the original API2520 OPAs, the Sonic Imagery Labs 252AP uses accurate, temperature-stable, supply-independent current sources. Power supply-independent current sources enable the input bias and matched-pair differential VAS stage to remain locked at the optimum operating point, regardless of the supply voltage.

Another feature not found in the original API2520 model is the addition of matched pairs of active current loads that give the 252AP's differential input and VAS stage its outstanding power supply noise rejection ratio (PSRR) performance.

The Sonic Imagery Labs 252AP can operate with power supplies from ±10V to ±25V. The redesigned input stage circuit offers exceptional common-mode rejection and maintains a low input bias current over its wide input voltage range, minimizing distortion. The 252AP is sandable to unity gain and offers exceptional dynamic behavior over a wide range of load conditions.

Integrated heat sinks for the power transistors, combined with an anodized aluminum case, allow the Sonic Imagery Labs 252AP 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.

Sonic Imagery Labs 252AP : Wiring diagrams and dimensions

Technical characteristics

Specifications
Product typeOPA
THD+N0.00045% @ Rl=600Ω, unitary gain, 1kHz
0.0003% @ Rl=600Ω, 20dB gain inversing, 1kHz
0.00034% @ Rl=600Ω, 20dB non-inversing gain, 1kHz
Noise0.89nV/rtHz typ. @ 1kHz, Rs=150Ω
Output current250mA peak
Output level+28dBu @ 600Ω
Supply voltage range±10V to ±28V
Input offset voltage (Vos) @ Rs=0Ω, Av=unitaryTyp : 0.022mV
Max : 0.035mV
Input offset current (Ios)Typ : 1nA
Max : 5nA
Input bias current (Ib)Min : 50nA
Typ : < 200nA
Voltage gain (open loop) (Avol) @ -3dB, 33HzMin : 118dB
Typ : 120dB
Max : 122.5dB
Output voltage swing (Vom) @ Vs=±24V, Rl=600Ω, Av=10Min : 44Vpp
Typ : 46Vpp
Output voltage swing (Vom) @ Vs=±24V, Rl=75Ω, Av=10Min : 40Vpp
Typ : 44.5Vpp
Input common-mode range (Vcm) @ Rl=600ΩMin : ±12V
Typ : ±12.5V
Common-mode mode rejection ratio (CMRR)Min : 80dB
Typ : 95dB
Power supply rejection ratio ratio (PSRR)Min : 88dB
Typ : 100dB
Supply current (Iq) @ Vo=0, gnd inputs, Vcc=24VMin : 15.9mA
Typ : 16.5mA
Max : 17mA
Supply current (Iq) @ Vo=0, gnd inputs, Vee=24VMin : 16mA
Typ : 16.9mA
Max : 17.5mA
Slew rate (SR) @ Rl=600ΩMin : 15V/uS
Typ : 16V/uS
Max : 17V/uS
Slew rate (SR) @ Rl=75ΩMin : 14V/uS
Typ : 15V/uS
Max : 16V/uS
 
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SONIC IMAGERY LABS 252AP Discrete OPA High Performance DIP2520/990 (Unit)
Sonic Imagery Labs' model 252AP is a high-performance, discrete operational amplifier (OPA) designed for professional audio applications and...

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