MAX97001

19-5130; Rev 0; 1/10 www.DataSheet4U.com TION KIT EVALUA BLE A IL A V A Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers General Description The MAX97001 mono audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier and an analog DPST switch. The headphone and speaker amplifiers have independent volume control and on/off control. The 4 inputs are configurable as 2 differential inputs or 4 single-ended inputs. The entire subsystem is designed for maximum efficiency. The high-efficiency, 700mW, Class D speaker amplifier operates directly from the battery and consumes no more than 1FA in shutdown mode. The Class H headphone amplifier utilizes a dual-mode charge pump to maximize efficiency while outputting a groundreferenced signal that does not require output coupling capacitors. The speaker amplifier incorporates a distortion limiter to automatically reduce the volume level when excessive clipping occurs. This allows high gain for low-level signals without compromising the quality of large signals. All control is performed using the 2-wire I2C interface. The MAX97001 operates over the extended -40NC to +85NC temperature range, and is available in the 2mm x 2.5mm, 20-bump, WLP package (0.5mm pitch). Features S 2.7V to 5.5V Speaker Supply Voltage S 1.6V to 2V Headphone Supply Voltage S 700mW Speaker Output (VPVDD = 3.7V, ZSPK = 8ω + 68µH) S 37mW/Channel Headphone Output (RHP = 16I) S Low-Emission Class D Amplifier S E...