THS3122 - Dual, High Output Current, 120-MHz Amplifier

The THS3122 and THS3125 are low-noise, high-speed current feedback amplifiers, with high output current drive. This makes them ideal for any application that requires low distortion over a wide frequency with heavy loads. The THS3122 and THS3125 can drive four serially-terminated video lines while maintaining a differential gain error less than 0.03%.

The high output drive capability of the THS3122 and THS3125 enables the devices to drive 50-Ω loads with low distortion over a wide range of output voltages: –80-dBc THD at 2 V_PP –75-dBc THD at 8 V_PP

The THS3122 and THS3125 operate from ±5-V to ±15-V supply voltages while drawing as little as 7.2 mA of supply current per channel. The THS3125 offers a low-power shutdown mode, reducing the supply current to only 370 µA. The THS3122 and THS3125 are packaged in SOIC, HSOP, and HTSSOP packages.

• Low Noise:
  • 2.9-pA/√Hz Noninverting Current Noise
  • 10.8-pA/√Hz Inverting Current Noise
  • 2.2-nV/√Hz Voltage Noise
  • 128-MHz , –3-dB BW (R_L = 50 Ω, R_F= 470 Ω)
  • 1550-V/µs Slew Rate (G = 2, R_L= 50 Ω)
• High Output Current: 450 mA
• High Speed:
  • 128-MHz , –3-dB BW (R_L = 50 Ω, R_F= 470 Ω)
  • 1550-V/µs Slew Rate (G = 2, R_L= 50 Ω)
  • 26-V_PP Output Voltage, R_L= 50 Ω
  • –80 dBc (1 MHz, 2 V_PP, G = 2)
• Wide Output Swing:
  • 26-V_PP Output Voltage, R_L= 50 Ω
  • –80 dBc (1 MHz, 2 V_PP, G = 2)
  • 370-µA Shutdown Supply Current
• Low Distortion:
  • –80 dBc (1 MHz, 2 V_PP, G = 2)
  • 370-µA Shutdown Supply Current
• Low-Power Shutdown Mode (THS3125)
  • 370-µA Shutdown Supply Current
• Standard SOIC, HSOP PowerPAD™, and HTSSOP PowerPAD Packages