AD1990 Description
The AD1990 is a 2-channel, bridge tied load (BTL), switching audio power amplifier with integrated Σ-Δ modulator. The modulator accepts a single-ended, analog input signal and converts it to a switching waveform to drive speakers directly. A digital, microprocessor-patible interface provides control of reset, mute, and PGA gain, as well as feedback signals for thermal and overcurrent error conditions.