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Texas Instruments OPA2675 Current Feedback Amplifier

Texas Instruments OPA2675 Current Feedback Amplifier provides the low distortion and high output current required for power-line modem driver and test and measurement applications. The OPA2675 operates on power supplies ranging from 4.5V to 13V. The device consumes a low 16.5mA/channel quiescent current to deliver a very high 1000mA output current. The OPA2675 can support the most demanding power-line modem requirements with 850mA assured minimum output current drive (at 25°C).

Power control features are included to minimize system power consumption. Two logic control lines allow for four quiescent power settings: full power, 75% bias power, 50% bias power, and offline mode with active offline control to present a high impedance with large signals present at the output pin. The two channels of Texas Instruments OPA2675 can be configured as a differential-input to differential-output, high current line driver, or used independently as individual op amps.

Features

  • 340MHz (G = 4V/V) wideband operation
  • 730MHz (G = 1V/V) unity-gain stable
  • ±1000mA high output current
  • Active offline mode for TDMA
  • Adjustable power modes
    • Full-bias mode: 16.5mA/channel
    • 75% bias mode: 12.5mA/channel
    • 50% bias mode: 8.5mA/channel
    • Offline mode: 2.4mA/channel
  • ±2.5V to ±6.5V bipolar-supply range
  • 4.5V to 13V single-supply range
  • 3500V/µs high slew rate
  • Overtemperature protection circuit
  • Output current limit (±1.3A)

Applications

  • Power-line modems
  • Matched I/Q channel amplifiers
  • Broadband video line drivers
  • ARB line drivers
  • High-cap load drivers
  • Ultrasonic-Piezo drivers

Functional Block Diagram

Block Diagram - Texas Instruments OPA2675 Current Feedback Amplifier

Texas Instruments OPA2675 Current Feedback Amplifier