The LM7171 is a high performance high output current voltage controlled amplifier from National. The chip has a very high conversion rate and a wide unit gain bandwidth, providing 4100V/µs conversion rate and 200MHz unit gain bandwidth while consuming only 6.5mA of supply current. The chip is ideal for video and high speed signal processing applications such as HDSL and pulse amplifiers. With 100mA output current, the LM7171 can be used for video distribution, transformer driver or laser diode driver. Operating 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 National's advanced VIP™ III (Vertically integrated PNP) complementary bipolar process.
The LM7171 is a high‑speed voltage‑feedback amplifier that combines the slewing characteristics of a current‑feedback device with the flexibility of traditional voltage‑feedback topologies. It operates from ±15 V or ±5 V supplies, draws only 6.5 mA, and can source or sink up to 100 mA of output current, making it suitable for video distribution, transformer drivers, and laser‑diode drivers.
The datasheet provides absolute maximum ratings, detailed DC and AC electrical characteristics, ordering information for multiple package types, and extensive performance graphs such as slew‑rate versus load capacitance and large‑signal pulse response. A design kit and pitch pack are also offered for rapid prototyping.
| Slew Rate | 4100 V/µs |
|---|---|
| Unity‑Gain Bandwidth | 200 MHz |
| Supply Current | 6.5 mA |
| Output Current (source/sink) | 100 mA |
| Input Offset Voltage | 0.2–3 mV |
| Input Bias Current | 2.7–10 µA |
The LM7171 has a maximum slew rate of 4100 V/µs.
The device consumes only 6.5 mA of supply current.
It can source or sink up to 100 mA of output current.