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LMH6629 LLP-8 amplifier evaluation board

Posted: 29 Jun 2011     Print Version  Bookmark and Share

Keywords:low noise  operational amplifier  device testing 

The LMH6629 evaluation board is designed to aid in the characterisation of National Semiconductor's High Speed LMH6629 low noise operational amplifier. The evaluation board can be used as a guide for high frequency layout and as a tool to aid in device testing and characterisation.

View the PDF document for more information.


The LMH6629 is a high-speed, ultra low-noise amplifier designed for applications requiring wide bandwidth with high gain and low noise such as in communication, test and measurement, optical and ultrasound systems.

The LMH6629 operates on 2.7 to 5.5V supply with an input common mode range that extends below ground and outputs that swing to within 0.8V of the rails for ease of use in single supply applications. Heavy loads up to �250 mA can be driven by high-frequency large signals with the LMH6629's �3dB bandwidth of 900 MHz and 1600 V/�s slew rate. The LMH6629 (LLP-8 package only) has user-selectable internal compensation for minimum gains of 4 or 10 controlled by pulling the COMP pin low or high, thereby avoiding the need for external compensation capacitors required in competitive devices. Compensation for the SOT23-5 package is internally set for a minimum stable gain of 10 V/V. The LLP-8 package also provides the power-down enable/ disable feature.

The low-input noise (0.69nV/ √Hz and 2.6 pA/ √Hz), low distortion (HD2/ HD3 = −90 dBc/−94 dBc) and ultra-low DC errors (800 �V VOS maximum over temperature, �0.45 �V/�C drift) allow precision operation in both AC- and DC-coupled applications.

The LMH6629 is fabricated in National Semiconductor�s proprietary SiGe process and is available in a 3mm x 3mm 8-pin LLP, as well as the SOT23-5, package.

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