DirectDriveのヘッドフォンアンプ、かさばるDCブロッキングコンデンサが不要
SUNNYVALE, CA-May 3, 2002-Maxim Integrated Products introduces the MAX4410 DirectDrive stereo headphone amplifier. The MAX4410 employs a revolutionary architecture that produces a ground-referenced output from a single supply, eliminating the two bulky DC-blocking capacitors that are typically required between the amplifier and headphone. The design produces the industry's lowest profile, smallest amplifier solution, occupying eight times less overall board space than existing designs. The MAX4410 is ideal for portable audio equipment where board space and height are critical. Unlike previous solutions, the MAX4410 does not require a DC bias voltage to be applied to the headphone jack ground pin, significantly simplifying end product design and reliability.
The MAX4410 operates from a single 1.8V to 3.6V supply, produces 80mW per channel into a 16 load, and has only 0.005% THD + N. High, 90dB PSRR allows the part to operate directly from noisy supplies. Independent left and right low-power shutdown controls make it possible to optimize power savings in mixed-mode mono/stereo applications. In addition to minimizing size, eliminating the DC-blocking capacitors also improves the low-frequency response of the amplifier, allowing full-range audio reproduction - especially important for music and video playback. Comprehensive click-and-pop reduction circuitry ensures fast turn-on/turn-off times without audible glitches. The outputs include ±8kV ESD protection.
The MAX4410 is available in a tiny 14-bump UCSP (2mm x 2mm) and a 16-pin TSSOP package making them ideal for cell phones, smart phones, MP3 players, PDAs, notebook computers, DVD, and general portable audio applications. Specifications are guaranteed over a -40°C to +85°C temperature range. An easy-to-use EV kit is available. Prices start at $0.75 (100,000-up, FOB USA).
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