SSM4321

Data Sheet Mono 2.9 W Class-D Audio Amplifier with Digital Current and Voltage Output SSM4321 FEATURES Filterless Class-D amplifier with spread-spectrum Σ-Δ modulation Digitized output of output voltage, output current, and PVDD supply voltage 72 dB signal-to-noise ratio (SNR) on output current sensing and 77 dB SNR on output voltage sensing TDM or multichip I2S slave output interface Up to 4 chips supported on a single bus 8 kHz to 48 kHz operation I2S/left justified slave output interface 1 or 2 chips supported on a single bus 8 kHz to 48 kHz operation PDM output interface operates from 1 MHz to 6.144 MHz 2.2 W into 4 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <1% total harmonic distortion plus noise (THD + N) 89% efficiency at 5.0 V, 1.4 W into 8 Ω + 0.2 Ω RSENSE speaker >100 dB signal-to-noise ratio (SNR) High PSRR at 217 Hz: 86 dB Amplifier supply operation from 2.5 V to 5.5 V Input/output supply operation from 1.42 V to 3.6 V Flexible gain adjustment pin: 0 dB to...