ANALOG DEVICES’ CLASS-D AUDIO AMPLIFIERS REDUCE DESIGN COMPLEXITY AND ENHANCE SOUND QUALITY IN PORTABLE ELECTRONICS

- SSM2375 Class-D amp offers a variety of gain-stage settings while achieving exceptional SNR and PSRR performance.
- SSM2380 stereo Class-D amp offers flexible ALC functions and easy programming.

Norwood, MA (03/31/2010) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced a pair of Class-D audio amplifiers for smart phones, GPS units and other handheld electronics where premium sound quality offers a major competitive advantage. The SSM2375 and SSM2380 amplifiers provide audio system designers with the option of fixed or programmable gain settings combined with low noise and superior audio performance

The SSM2380 low-power, stereo Class-D amplifier incorporates an I2C interface, which allows gain stages to be set from 1 dB to 24 dB (plus mute) in 47 distinct steps with no other external components required. The programmable interface also enables independent L/R channel shutdown, a variable low-EMI (electro-magnetic interference) emission control mode, and programmable ALC (automatic level control) functions for speaker protection. The SSM2380 achieves a 100-dB SNR (signal-to-noise ratio) and extends battery life by achieving 93 percent power efficiency at 5 V while running at 1.4 W into an 8-ohm speaker.

The SSM2375 is a high-performance, fully-integrated Class-D amplifier with single-pin 5-level gain setting in 3-dB stages from 0 dB to 12 dB. The single-pin gain setting eliminates input resistors and ensures a better input match that reduces noise and improves audio quality. Operating from a single 2.5-V to 5.5-V supply, the amplifier delivers 3 W of continuous output power with less than 1 percent THD (total harmonic distortion) when driving a 3-ohm load from a 5-V supply.

The SSM2375 offers greater than 100-dB SNR performance and at 215 Hz achieves an 80-dB PSRR (power-supply rejection ratio) that is 10 dB higher than the closest competing Class-D amplifier. The amplifier’s low noise and EMI allow engineers more flexibility to place the speaker on the board in end product designs.

Availability and Pricing

Product Samples Availability Temperature
Range
Price Each
Per 1,000
Packaging
SSM2375 March May -40°C to +85°C $0.57 9-Lead WLCSP
SSM2380 March April -40°C to +85°C $0.75 16-Lead WLCSP

For more information, visit http://www.analog.com/pr/SSM2375 or http://www.analog.com/pr/SSM2380. For more information on ADI’s amplifier portfolio, visit http://www.analog.com/audio-amplifiers. To connect with a specialist, cross reference tools, and for more resources on how to use and obtain ADI products, please click here: http://www.analog.com/buy.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

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Editor's Contact Information:

Bob Olson
781/937-1666

bob.olson@analog.com

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