Date: 18/05/2010

High-speed op-amp from National Semiconductor for low noise application

National Semiconductor introduces a new high speed operational amplifier delivering low noise of 0.69 nV/sqrt Hz. It has a -3dB bandwidth of 900 MHz at a gain of 10. The LMH6629 suggested for systems with minimal noise such as communications, test and measurement, medical imaging, industrial, and light detecting and ranging (LIDAR).

The LMH6629 provides low input current noise (2.6 pA/sqrt Hz) and second and third harmonic distortion (f = 1 MHz) performance of -90 dBc and -94 dBc, respectively. LMH6629 features input offset voltage max of 780 uV at 25 degrees C and +/- 0.45 uV per degree C of TCVos. Its input common-mode range extends below ground and the output swings to within 0.8V of either rail with a linear output current greater than +/- 250 mA. The op amp consumes 15.5 mA and works within a supply voltage range from 2.7V to 5.5V. Its selectable internal compensation eliminates the external compensation components and additional design time required with other amplifiers and its minimum gain can be set to 4 or 10 by pulling the minimum gain select pin low or high.

The LMH6629 is manufactured using CBiCMOS8 (complementary bipolar-CMOS) silicon-germanium (SiGe) process technology. This technology features a unique, monolithic combination of SiGe NPN and PNP transistors, as well as low-power CMOS transistors.

Package: 8-pin LLP.

Price: Each at US$1.88 in 1,000-unit quantities.

Availability: Now.

For more information visit: www.national.com/pf/LM/LMH6629.html