GENERAL 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-compatible interface provides control of reset, mute, and PGA gain, as well as feedback signals for thermal and overcurrent error conditions. The output stage can operate over a power supply voltages range of 8 V to 12 V. The analog modulator and digital logic operate from a 5 V supply.

FEATURES
    Integrated stereo modulator and power stage
    <0.002% THD + N
    101 dB dynamic range (A-weighted)
    2 × 5 W output power (4 Ω, <0.01% THD + N)
    RDS-ON < 0.3 Ω (per transistor)
    PSRR > 65 dB
    On-off-mute pop noise suppression
    EMI optimized modulator
    Short-circuit protection
    Overtemperature protection
    Low cost DMOS process

APPLICATIONS
    Advanced televisions
    Compact multimedia systems
    Minicomponents