描述 Description

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 VPP –75-dBc THD at 8 VPP 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.

特性 Features

? 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 (RL = 50 Ω, RF= 470 Ω)
? 1550-V/μs Slew Rate (G = 2, RL= 50 Ω)

? High Output Current: 450 mA
? High Speed:
? 128-MHz , –3-dB BW (RL = 50 Ω, RF= 470 Ω)
? 1550-V/μs Slew Rate (G = 2, RL= 50 Ω)
? 26-VPP Output Voltage, RL= 50 Ω
? –80 dBc (1 MHz, 2 VPP, G = 2)

? Wide Output Swing:
? 26-VPP Output Voltage, RL= 50 Ω
? –80 dBc (1 MHz, 2 VPP, G = 2)
? 370-μA Shutdown Supply Current

? Low Distortion:
? –80 dBc (1 MHz, 2 VPP, 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