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Maxim IC MAX97200 Class H Headphone AmplifiersMaxim IC MAX97200 Class H DirectDrive® II headphone amplifiers are compact, 45mw devices that provide nearly two times greater efficiency than the closest competitive Class G headphone amplifiers. Maxim IC MAX97200 Class H headphone amplifiers feature second-generation, dual-mode DirectDrive II technology that saves power by switching between two supply voltages. The dual-mode charge pump uses ±0.9V rails when the output signal is small, only switching to ±1.8V supply voltage when more output power is needed. This technology renders a continuous signal without the glitches seen in Class G amplifiers. MAX97200 headphone amplifiers are offered in a tiny, 12-bump wafer level packaging (WLP 1.27mm x 1.65mm) with a small, 0.4mm lead pitch and specified over the -40°C to +85°C extended temperature range. These Maxim IC devices are designed for use in cellular phones, smartphones, VoIP phones, and MP3 players.
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Features
- Second-Generation DirectDrive Technology
- Dynamic, Class H, Dual Mode Charge Pump
- Low Voltage Operation, VPVIN = 1.8V
- Low Quiescent Current, 1.15mA (typ) at VPVIN = 1.8V
- Eliminates Large Output DC-Blocking Capacitors
- Industry-Leading Click-and-Pop Performance
- High-Fidelity, SNR 105dB (5.6μV Output Noise)
- Output Power 34mW into 32I (THD+N 1%)
- Output Power 45mW into 16I (THD+N 10%)
- Tiny, 12-Bump, 1.27mm x 1.65mm (0.4mm Lead Pitch) WLP Package
Applications
- Cellular Phones
- Smartphones
- MP3 Players
- VoIP Phones
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Block Diagram
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Application Circuit
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