Maxim offers better PSRR (76dB vs. 65dB for Analog Devices AD1990
Higher efficiency (87% vs. 80% for AD1990)
Wider operating voltage range (10V to 25V vs. 8V to 20V for AD1990)
Spread-Spectrum modulation for lower EMI
Differential audio inputs instead of single ended compared to the AD1990. Offered in a 7x7mm package vs. a 9x9mm package for the AD1990. The AD1990 requires 8 external clamp diodes.
