National Semiconductor LM4562 is a newly launched ultra-low distortion, low noise, high slew rate operational amplifier series, a member of the series entirely for high-performance, high fidelity applications. By using the most cutting-edge technology and new circuit design, LM4562 audio op amps offer excellent audio signal amplification. The op amp has a very low voltage noise density (2.7nV/Hz 1 / 2 ) and THD + N (0.00003%), and high gain bandwidth product (55MHz) can easily meet the most demanding audio applications. To ensure that the most difficult to deal with a smooth drive load, LM4562 has a ± 20V/us high conversion rate and ± 30mA output current capability. In addition, the output stage drives 2kO loads the required power supply voltage less than 1V, the power required to drive 600O load voltage less than 1.4V, the maximum dynamic range can.
LM4562's CMRR (120dB), PSRR (120dB), Vos (0.1mV) and other indicators is also very prominent, the amplifier provides excellent DC characteristics. It also has output short circuit protection.
LM4562 wide operating voltage range ± 2.5 ~ ± 17V. In this range, the input circuit can guarantee its excellent common-mode and power supply rejection ratio, while maintaining low input bias current. Single-gain stable LM4562. The value of audio content transported on driver loads up to 100pF of the complex can still get excellent AC characteristics.
LM4562 total of 8 pins, shown in Figure 1. The package is SOIC, Plastic DIP, TO-99 metal package shown in Figure 2. Schedule for the LM4562's electrical characteristics. Test conditions for the Vs = ± 15V, RL = 2kO, Rsource = 10kO, fin = 1kHz, unless otherwise noted, TA = 25 . Typical at 25 to determine, on behalf of the standard parameters. Within the test conditions, National Semiconductor Corporation to ensure performance. Thus the measured PSRR: ± 5V and ± 15V in the two voltages measured Vos,PSRR = | 20log(Vos / Vs) |.
LM4562 can be widely used in high-quality audio amplification, high fidelity pre-amplifier, high-fidelity multimedia, high-quality cartridge pre-amplifier, high-performance professional audio, high-fidelity equalization and crossover networks, high performance line driver, high-performance line receivers devices, high-fidelity active filters. Figure 3 to Figure 8, some typical applications for the LM4562.
Figure 3 Balance - single-ended converter
Figure 4 tone controls
Figure 5 RIAA preamplifier
Figure 6 Line Driver
Figure 7 balanced microphone amplifier input
Figure 8 10-band graphic equalizer