THAT 1646W16-U

The THAT 1606 and 1646 are a new generationof monolithic audio differential line drivers offering improved performance over conventional cross-coupled designs. Based on a high-performance, fully differential opamp and laser-trimmed thin-film resistors, both families exhibit low noise and distortion, high slew rate, and wide output swing. The parts are stable when driving difficult loads, and have short-circuit protected outputs
Designed from the ground up in THAT's complementary dielectric isolation process, both models in corporate THAT's patented OutSmarts 1 technology.
This is a dual feedback-loop design that prevents the excessive ground currents typical of cross-coupled output stages (CCOS) when clipping into single-ended loads. OutSmarts uses two individual negative-feedback loops to separately control the differential output voltage and common mode output currents, making the designs inherently more stable and less sensitive to component tolerances than common CCOSes. As a result, THAT's topology prevents the loss of common-mode feedback that plagues common CCOS designs when clipping into single-ended loads. This avoids excessive ground currents that would otherwise upset power supplies and create additional distortion, even in adjacent channels.
The 1646 is pin-compatible with the TI DRV134 and DRV135, as well as the Analog Devices SSM2142. The 1606 offers an advanced com- mon-mode offset voltage reduction scheme, which requires a small single capacitor instead of the two electrolytics required by the 1646 and its pin-compatible cousins. Additionally, the 1606 features differential inputs in a space-saving 16-pin QSOP package. Both parts offer +6dB gain.

Specifications:

Balanced, transformer-like floating output

OutSmarts technology improves clipping into single-ended loads

Stable driving long cables and capacitive loads

High output: 18Vrms into 600

Low noise: -101 dBu

Low distortion: 0.0007% @ 1kHz

Industry-standard pinout