Audio subsystems use Class D and H technologies to maximize battery life
The MAX97000/MAX97001/MAX97002 mono audio subsystems integrate a Class D mono speaker amplifier with limiter; a Class H DirectDrive II stereo headphone amplifier; and an analog bypass switch all in a WLP package. According to the company, they provide the industry’s best efficiency (87% typ) and audio quality making them ideal for cellular phones, portable media players (PMPs), and other applications that require high audio quality, output power, and efficiency.
The company’s DirectDrive II technology uses a dual-mode internal charge pump that operates at ±0.9 V for low signal levels, only switching to ±1.8 V for signals that require higher output power. The MAX97000-MAX97002 deliver over 710 mW of output power from a 3.7-V supply into an 8-Ω load.
All parts feature a high RF/TDMA noise rejection and best-in-class click-and-pop suppression with no audible artifacts at power on/off, both of which simplify the design iteration process. The subsystems also feature input mixing, volume control, and a flexible, user-defined input architecture with preamplifier gain settings. All controls are enabled through an I2 C interface. (From $0.75 ea/1,000 contact company for availability.)
Maxim Integrated Products , Sunnyvale , CA
Customer Service 800-998-8800
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