LMH6644-MIL Low Power, 130MHz, 75mA Rail-to-Rail Output Amplifiers | TI.com


Low Power, 130MHz, 75mA Rail-to-Rail Output Amplifiers


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Other device variants can also be found in the  LMH6644 product page


The LMH6644-MIL true single supply voltage feedback amplifier offers 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 performance.

Input common mode voltage range extends to 0.5 V 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 (0.1-dB gain flatness up the 12 MHz under 150-Ω load and AV = +2) with minimal peaking (typically 2-dB maximum) for any gain setting and under both heavy and light loads. This along with fast settling time (68 ns) and low distortion allows the device to operate well in an ADC buffer as well as high-frequency filter applications.

This device offers professional quality video performance with low differential gain (0.01%) and differential phase (0.01°) characteristics. Differential gain and differential phase characteristics are also well maintained under heavy loads (150 Ω) and throughout the output voltage range.


  • (VS = ±5 V, TA = 25°C, RL = 2 kΩ, AV = +1. Typical Values Unless Specified).
  • –3 dB BW (AV = +1) 130 MHz
  • Supply Voltage Range 2.7 V to 12.8 V
  • Slew Rate, (AV = –1) 130 V/µs(1)
  • Supply Current (no load) 2.7 mA/amp 
  • Output Short Circuit Current +115 mA to 145 mA
  • Linear Output Current ±75 mA
  • Input Common Mode Voltage 0.5 V Beyond V, 1 V from V+
  • Output Voltage Swing 40 mV from Rails 
  • Input Voltage Noise (100 kHz) 17 nV/√Hz
  • Input Current Noise (100 kHz) 0.9 pA/√Hz
  • THD (5 MHz, RL = 2 kΩ, VO = 2 VPP, AV = +2) –62 dBc
  • Settling Time 68 ns
  • Fully Characterized for 3 V, 5 V, and ±5 V
  • Overdrive Recovery 100 ns
  • Output Short Circuit Protected(2)
  • No Output Phase Reversal with CMVR Exceeded

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