Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Controls/MCUs

Maxim headphone amplifier eliminates dc-blocking capacitors

Posted: 08 Jul 2002 ?? ?Print Version ?Bookmark and Share

Keywords:max4410? directdrive amplifier? stereo headphone amplifier?

Employing a revolutionary architecture that produces a ground-referenced output from a single supply, the MAX4410 DirectDrive stereo headphone amplifier from Maxim Integrated Products Inc. eliminates the need for two bulky dc-blocking capacitors typically required between the amplifier and headphone.

The company claims that the design produces the world's lowest profile, smallest amplifier solution, occupying eight times less overall board space than existing designs, making the amplifier suitable 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 amplifier operates from a single 1.8V to 3.6V supply, produces 80mW per channel into a 16-ohm load, and has only 0.005 percent THD+N.

High, 90dB PSRR allows the part to operate directly from noisy supplies, while 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.

A click-and-pop reduction circuitry is included to ensure fast turn-on/turn-off times without audible glitches. The outputs include 18kV ESD protection.

The MAX4410 is available in a 14-bump UCSP and a 16-pin TSSOP casing, and is rated for operation from -400C to 850C. Prices start at 75 cents in 100,000-up quantities.

Article Comments - Maxim headphone amplifier eliminates...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top