The LMH664X family true single supply voltage feedback amplifiers offer high speed (130
MHz), low distortion (−62 dBc), and exceptionally high output current (approximately 75 mA) at low
cost and with reduced power consumption when compared against existing devices with similar
Input common mode voltage range extends to 0.5V below V− and 1
V from V+. Output voltage range extends to within 40 mV of either supply
rail, allowing wide dynamic range especially desirable in low voltage applications. The output
stage is capable of approximately 75 mA in order to drive heavy loads. Fast output Slew Rate (130
V/µs) ensures large peak-to-peak output swings can be maintained even at higher speeds, resulting
in exceptional full power bandwidth of 40 MHz with a 3 V supply. These characteristics, along with
low cost, are ideal features for a multitude of industrial and commercial applications.
Careful attention has been paid to ensure device stability under all operating voltages
and modes. The result is a very well behaved frequency response characteristic (0.1dB gain flatness
up the 12 MHz under 150 Ω load and AV = +2) with minimal peaking (typically
2dB maximum) for any gain setting and under both heavy and light loads. This along with fast
settling time (68ns) and low distortion allows the device to operate well in ADC buffer, and high
frequency filter applications as well as other applications.
This device family offers professional quality video performance with low DG (0.01%) and
DP (0.01°) characteristics. Differential Gain and Differential Phase characteristics are also well
maintained under heavy loads (150 Ω) and throughout the output voltage range. The LMH664X family is
offered in single (LMH6642), dual (LMH6643), and quad (LMH6644) options.
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