LM3875

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage |V⁺| + |V⁻| (No Signal) .....................................94V
Supply Voltage |V⁺| + |V⁻| (Input Signal) .................................84V
Common Mode Input Voltage ..................................(V⁺ or V⁻) and
..............................|V⁺| + |V⁻| 80V
Differential Input Voltage ..........................................................60V
Output Current ....................................................Internally Limited
Power Dissipation (Note 3) ....................................................125W
ESD Susceptibility (Note 4)................................................... 2500V
Junction Temperature (Note 5)............................................ 150°C
Soldering Information
T package (10 seconds)...................................................... 260°C
Storage Temperature .......................................−40°C to +150°C
Thermal Resistance
JC .....................................................................................1°C/W
JA ...................................................................................43°C/W

The LM3875 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8W load with 0.1% (THD + N) from 20 Hz20 kHz. The performance of the LM3875, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) Protection Circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe Protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.

The LM3875 maintains an excellent Signal-to-Noise Ratio of greater than 95 dB(min) with a typical low noise floor of 2.0 V. It exhibits extremely low (THD + N) values of 0.06% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.