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Texas Instruments LM7171 Voltage Feedback Amplifier

Texas Instruments LM7171 Voltage Feedback Amplifier is a high-speed voltage feedback amplifier with the slewing characteristic of a current feedback amplifier. It can also be used in all traditional voltage feedback amplifier configurations. The LM7171 is stable for gains as low as +2 or −1. It provides a very high slew rate at 4100V/μs and a wide unity-gain bandwidth of 200MHz while consuming only 6.5mA of supply current. It is ideal for video and high-speed signal processing applications such as HDSL and pulse amplifiers. With a 100mA output current, the LM7171 can be used for video distribution, a transformer driver, or a laser diode driver.

Operation on ±15V power supplies allows for large signal swings and provides greater dynamic range and signal-to-noise ratio. The LM7171 offers low SFDR and THD, ideal for ADC/DAC systems. In addition, the LM7171 is specified for ±5V operation for portable applications. The LM7171 is built on Texas Instruments’ advanced VIP III (Vertically Integrated PNP) complementary bipolar process.

Features

  • Easy-to-use voltage feedback topology
  • 2400V/μs very high slew rate
  • 200MHz wide unity-gain bandwidth
  • −3dB frequency @ AV = +2 (220MHz)
  • 6.5mA low supply current
  • 85dB high open-loop gain
  • 100mA high output current
  • Specified for ±15V and ±5V operation
  • Available with radiation guarantee
  • Total ionizing dose 300 Krad(Si)
  • ELDRS free 300 Krad(Si)

Applications

  • HDSL and ADSL drivers
  • Multimedia broadcast systems
  • Professional video cameras
  • Video amplifiers
  • Copiers/scanners/fax
  • HDTV amplifiers
  • Pulse amplifiers and peak detectors
  • CATV/fiber optics signal processing

Simplified Schematic

Schematic - Texas Instruments LM7171 Voltage Feedback Amplifier

Texas Instruments LM7171 Voltage Feedback Amplifier