Maxim Integrated Products Inc. (Sunnyvale, CA) introduced the new MAX9720 headphone amplifier with a low 5mA supply current that combines Maxim's patented DirectDrive architecture and SmartSense feature, which is an automatic mono/stereo switching feature that eliminates battery drain into a shorted load, and prevents damage to the amplifier.
The device operates from a single 1.8V to 3.6V supply, exhibits 0.003% THD + N, and delivers up to 50mW per channel into a 16-ohm load. A 92dB power supply rejection ratio allows operation from noisy digital supplies without additional power conditioning. Two preset gain options are available (0dB for the MAX9720A and 3dB for the MAX9720B), eliminating the need for external gain setting resistors and simplifying system design.
The MAX9720 is available in 2mm x 2mm x 0.6mm, 16-bump CSP, and a 16-pin TSSOP, both specified over the -40°C to +85°C temperature range.
