The SSM2275 and SSM2475 use the Butler Amplifier front end, which combines both bipolar and FET transistors to offer the accuracy and low noise performance of bipolar transistors and the slew rates and sound quality of FETs. This product family includes dual and quad rail-to-rail output audio amplifiers that achieve lower production costs than the industry standard OP275 (the first Butler Amplifier offered by Analog Devices). This lower cost amplifier also offers operation from a single 5 V supply, in addition to conventional ±15 V supplies. The ac performance meets the needs of the most demanding audio applications, with 8 MHz bandwidth, 12 V/ms slew rate and extremely low distortion.
The SSM2275 and SSM2475 are ideal for application in high performance audio amplifiers, recording equipment, synthesizers, MIDI instruments and computer sound cards. Where cascaded stages demand low noise and predictable performance, SSM2275 and SSM2475 are a cost effective solution. Both are stable even when driving capacitive loads.
The ability to swing rail-to-rail at the outputs (see Applications section) and operate from low supply voltages enables designers to attain high quality audio performance, even in single supply systems. The SSM2275 and SSM2475 are specified over the extended industrial (40°C to +85°C) temperature range. The SSM2275 is available in 8-lead plastic DIPs, SOICs, and microSOIC surfacemount packages. The SSM2475 is available in narrow body SOICs and thin shrink small outline (TSSOP) surface-mount packages.
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