130MHz op-amps improve power-to-performance ratio

The LMH6618 and LMH6619 operational amplifiers are members of the PowerWise™ family designed to offer an enhanced power-toperformance ratio.

The single LMH6618 with shutdown, and dual LMH6619, are 130MHz rail-to-rail input and output amplifiers designed for ease-ofuse and a wide range of applications requiring high speed, low supply current, low noise, and the ability to drive complex ADC and video loads.

The amplifiers’ voltage feedback design topology provides balanced inputs and high open-loop gain for ease of use and accuracy in applications such as active filter design. Offset voltage is typically 0.1mV and settling time to 0.01% is 120ns which, combined with a 100dBc SFDR at 100kHz, makes the parts suitable for use as an input buffer for popular 8-bit, 10-bit, 12-bit and 14-bit megasample ADCs.

The operating voltage range extends from 2.7V to 11V, and the supply current is typically 1.25mA per channel at 5V. The input common mode range extends 200mV beyond the supply rails. On a single 5V supply with a ground-terminated 150Ω load, the output swings to within 37mV of the ground rail. A mid-rail terminated 1kΩ load will swing to 77mV of either rail, providing true single-supply operation and maximum signal dynamic range on low-power rails. The amplifier output will source and sink 35mA and drive up to 30pF loads without the need for external compensation.

The LMH6618 has an active low disable pin which reduces the supply current to 72µA and is offered in the space-saving 6-pin TSOT23 package. The LMH6619 is offered in the 8-pin SOIC package. The LMH6618 and LMH6619 are available with a -40°C to 125°C extended industrial temperature range.

 

FEATURES 130MHz small-signal bandwidth 55V/µs slew rate 90ns settling time to 0.1% 120ns settling time to 0.01% 100dBc Spurious Free Dynamic Range (SFDR) (f = 100kHz, AV = +1, VOUT = 2VPP) 15MHz 0.1dB bandwidth (AV = +2) 10nV/√Hz voltage noise

APPLICATIONS ADC driver DAC buffer Active filters High-speed sensor amplifier Current-sense amplifier Portable video STB or TV video amplifier

 

 

	National Semiconductor/LMH6618
	National Semiconductor/LMH6619