The THS6212 provides the exceptional ac performance of a wideband current-feedback op amp with a highly linear, high-power output stage. Requiring only 19.5 mA of quiescent current, the THS6212 has an output swing of 49 Vpp (100-Ω load) coupled with over 650 mA current drive (25 Ω load). This low-output headroom requirement, along with biasing that is independent of the supply voltage, provides a remarkable 28-V supply operation. The THS6212 delivers greater than 285-MHz bandwidth driving a 2-V_PP output into 100 Ω on a 28-V supply. Previous boosted output stage amplifiers typically suffer from very poor crossover distortion when the output current goes through zero. The THS6212 achieves a comparable power gain with improved linearity. The primary advantage of a current-feedback op amp over a voltage-feedback op amp is that ac performance (bandwidth and distortion) is relatively independent of signal gain. Figure 7-1 shows the dc-coupled, gain of 10 V/V, dual power-supply circuit configuration used as the basis of the 28-V Electrical Characteristics tables and Typical Characteristics sections.

Figure 7-1 Noninverting Differential I/O Amplifier