LMH6618_0711 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – PowerWise® 130 MHz, 1.25 mA RRIO Operational Amplifiers

November 27, 2007
LMH6618 Single/LMH6619 Dual
PowerWise^® 130 MHz, 1.25 mA RRIO Operational
Amplifiers
General Description
The LMH6618 (single, with shutdown) and LMH6619 (dual)
are 130 MHz rail-to-rail input and output amplifiers designed
for ease of use in a wide range of applications requiring high
speed, low supply current, low noise, and the ability to drive
complex ADC and video loads. The operating voltage range
extends from 2.7V to 11V and the supply current is typically
1.25 mA per channel at 5V. The LMH6618 and LMH6619 are
members of the PowerWise family and have an exceptional
power-to-performance ratio.
The amplifier’s 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 0.1 mV and settling time to 0.01% is 120
ns which combined with an 100 dBc SFDR at 100 kHz makes
the part suitable for use as an input buffer for popular 8-bit,
10-bit, 12-bit and 14-bit mega-sample ADCs.
The input common mode range extends 200 mV beyond the
supply rails. On a single 5V supply with a ground terminated
150Ω load the output swings to within 37 mV of the ground
rail, while a mid-rail terminated 1 kΩ load will swing to 77 mV
of either rail, providing true single supply operation and max-
imum signal dynamic range on low power rails. The amplifier
output will source and sink 35 mA and drive up to 30 pF loads
without the need for external compensation.
The LMH6618 has an active low disable pin which reduces
the supply current to 72 µA 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
grade.
Features
V_S = 5V, R_L = 1 kΩ, T_A = 25°C and A_V = +1, unless otherwise
specified.
■ ^{Operating voltage range}
2.7V to 11V
■ ^{Supply current per channel}
1.25 mA
■ ^{Small signal bandwidth}
130 MHz
■ ^{Slew rate}
55 V/µs
■ ^{Settling time to 0.1%}
90 ns
■ ^{Settling time to 0.01%}
120 ns
■ ^{SFDR (f = 100 kHz, A}_V ^{= +1, V}_OUT ^{= 2 V}_PP⁾
100 dBc
■ ^{0.1 dB bandwidth (A}_V ^{= +2)}
■ ^{Low voltage noise}
15 MHz
10 nV/√Hz
■ ^{Industrial temperature grade}
−40°C to +125°C
■ ^{Rail-to-Rail input and output}
Applications
■ ^{ADC driver}
■ ^{DAC buffer}
■ ^{Active filters}
■ ^{High speed sensor amplifier}
■ ^{Current sense amplifier}
■ ^{Portable video}
■ ^{STB, TV video amplifier}
Typical Application
PowerWise^® is a registered trademark of National Semiconductor.
WEBENCH^® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 201958
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