FAB3346 is an unbalanced to balanced line driver module using a THAT1646 PDIP8 chip.
The THAT 1646 is a new generation of monolithic audio differential line driver offering improved performance over conventional cross-coupled designs. Based on a high-performance, fully differential opamp and laser-trimmed thin-film resistors, the THAT 1646 exhibits low noise and distortion, high slew rate, and wide output swing. The THAT1646 is stable when driving difficult loads, and have short-circuit protected outputs.